|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | A survey on rough set theory and its applications显示文摘 | Qinghua Zhang Qin Xie Guoyin Wang | 2016 | CAAI Transactions on Intelligence Technology2016，1，4： | 13 |
| 2 | Estimation of ground heat flux and its impact on the surface energy budget for a semi-arid grassland显示文摘Three approaches,i.e.,the harmonic analysis(HA) technique,the thermal diffusion equation and correction(TDEC) method,and the calorimetric method used to estimate ground heat flux,are evaluated by using observations from the Semi-Arid Climate and Environment Observatory of Lanzhou University(SACOL) in July,2008.The calorimetric method,which involves soil heat flux measurement with an HFP01SC self-calibrating heat flux plate buried at a depth of 5 cm and heat storage in the soil between the plate and the surface,is here called the ITHP approach.The results show good linear relationships between the soil heat fluxes measured with the HFP01SC heat flux plate and those calculated with the HA technique and the TDEC method,respectively,at a depth of 5 cm.The soil heat fluxes calculated with the latter two methods well follow the phase measured with the HFP01SC heat flux plate.The magnitudes of the soil heat flux calculated with the HA technique and the TDEC method are close to each other,and they are about 2 percent and 6 percent larger than the measured soil heat flux,respectively,which mainly occur during the nighttime.Moreover,the ground heat fluxes calculated with the TDEC method and the HA technique are highly correlated with each other(R2 = 0.97),and their difference is only about 1 percent.The TDEC-calculated ground heat flux also has a good linear relationship with the ITHP-calculated ground heat flux(R2 = 0.99),but their difference is larger(about 9 percent).Furthermore,compared to the HFP01SC direct measurements at a depth of 5 cm,the ground heat flux calculated with the HA technique,the TDEC method,and the ITHP approach can improve the surface energy budget closure by about 6 percent,7 percent,and 6 percent at SACOL site,respectively.Therefore,the contribution of ground heat flux to the surface energy budget is very important for the semi-arid grassland over the Loess Plateau in China.Using turbulent heat fluxes with common corrections,soil heat storage be-tween the surface and the heat flux plate can improve the surface energy budget closure by about 6 to 7 percent,resulting in a clo-sure of 82 to 83 percent at the SACOL site. | JinQing Zuo JieMin Wang JianPing Huang WeiJing Li GuoYin Wang HongLi Ren | 2011 | Research in Cold and Arid Regions2011，3，1： | 11 |
| 3 | Determination of rare earth elements in plant protoplasts by MAA显示文摘A preliminary study on the speciation of rare earth elements in plant cells has been carried out by molecular activation analysis (MAA). Mesophyll protoplasts of Brassica napus were isolated by enzymatic digestion. After being washed with isosmotic solution containing EDTA for several times, the protoplasts were purified by gradient centrifugation. Then the concentration of rare earth elements (REEs) in the protoplasts was determined by neutron activation analysis. The result shows that REEs can enter the cells of the plant. | ZHANG Zhiyong WANG Yuqi SUN Jingxin LI Fuliang CHAI Zhifang XU Lei LI Xin CAO Guoyin | 2000 | Chinese Science Bulletin2000，45，16： | 8 |
| 4 | Association study of the single nucleotide polymorphisms in adiponectin-associated genes with type 2 diabetes in Han Chinese显示文摘Single-nucleotide polymorphisms (SNPs) of ADIPOQ, ADIPOR1, and ADIPOR2 have been associated with type 2 diabetes mellitus (T2DM), but there are many conflicting results especially in Chinese populations. To investigate the contribution of the adiponectin genes and their receptors to T2DM, a case-control study was performed and 11 SNPs of ADIPOQ, ADIPOR1, and ADIPOR2 were genotyped in 985 T2DM and 1,050 control subjects. rs16861194 (-11426 A>G) in the putative promoter of ADIPOQ was associated with T2DM (P = 0.007; OR = 1.29, 95% CI 1.08-1.55). None of the other 10 SNPs were associated with T2DM in this study, although rs2241766 and rs1501299 were reported to be associated with T2DM in previous Chinese studies. There was also no significant difference found from the ADIPOQ haplotype analysis, which contains rs16861194. In addition, we also assessed potential gene-gene interactions in three genes and no interactions were found. In conclusion, our results supported the ADIPOQ gene as a possible risk factor for type 2 diabetes in Han Chinese population. | Yabing Wang Di Zhang Yun Liu Yifeng Yang Teng Zhao Jie Xu Sheng Li Zuofeng Zhang Guoyin Feng Lin He He Xu | 2009 | Journal of Genetics and Genomics2009，36，7： | 7 |
| 5 | Rough set extensions in incomplete information systems显示文摘All eight possible extended rough set models in incomplete information systems are proposed.By analyzing existing extended models and technical meth-ods of rough set theory,the strategy of model extension is found to be suitable for processing incomplete information systems instead of filling possible values for missing attributes.After analyzing the definitions of existing extended models,a new general extended model is proposed.The new model is a generalization of indiscernibility relations,tolerance relations and non-symmetric similarity relations.Finally,suggestions for further study of rough set theory in incomplete informa-tion systems are put forward. | Guoyin WANG Lihe GUAN Feng HU | 2008 | Frontiers of Electrical and Electronic Engineering in China2008，3，4： | 7 |
| 6 | Indian hedgehog mutations causing brachydactyly type A1 impair Hedgehog signal transduction at multiple levels显示文摘Brachydactyly 打 A1 (BDA1 ) ,第一在人记录了孟德尔的正染色体的主导的混乱,被弄短或中间的指骨的缺席描绘。在印度刺猬(IHH ) 基因的异质接合的错误感觉变化作为 BDA1 的一个原因被识别了;然而,这些变化的生物化学的后果是不清楚的。在这份报纸,我们在印度刺猬(IhhN ) 的 N 终端碎片分析了三个 BDA1 变化(E95K, D100E,和 E131K ) 。结构的分析证明 E95K 变化在一条钙绑定沟把一个否定地控告的区域改变到一个断然控告的区域,并且 D100E 变化改变本地第三级的结构。而且,我们证明 E95K 和 D100E 变化导致了一温度敏感并且 IhhN 的钙依赖者不稳定性,它可能经由 lysosome 贡献变异的蛋白质的提高的细胞内部的降级。尤其是,所有三个变化影响了对受体 Patched1 (PTC1 ) 有约束力的 Hh,减少它的能力导致细胞的区别。我们建议这些是引起 BDA1 的变化的普通特征,影响 Hh 第三级的结构,细胞内部的命运,到受体 / 搭挡的绑定,和到细胞外的部件的绑定。这些特征的联合改变发信号的能力和范围,但是影响是可能的是变量和变化依赖者。在发信号的范围的潜在的变化被和 heparan 硫酸盐的一个提高的相互作用与 E95K 变化,然而并非 E131K 变化为 IHH 描绘。一起拿,我们的结果建议这些 IHH 变化影响在多重层次,引起的反常骨头发展和反常的位形成发信号的 Hh。 | Gang Ma Jiang Yu Yue Xiao Danny Chan Bo Gao Jianxin Hu Yongxing He Shengzhen Guo Jian Zhou Lingling Zhang Linghan Gao Wenjuan Zhang Yan Kang Kathryn SE Cheah Guoyin Feng Xizhi Guo Yujiong Wang Cong-zhao Zhou Lin He | 2011 | Cell Research2011，21，9： | 6 |
| 7 | SmMYB2 promotes salvianolic acid biosynthesis in the medicinal herb Salvia miltiorrhiza显示文摘MYB transcription factors play vital roles in plant growth and metabolism.The phytohormone methyl jasmonate(MeJA)promotes phenolic acid accumulation in the medicinal herb Salvia miltiorrhiza,but the regulatory mechanism is poorly understood.Here,we identified the MeJA-responsive R2R3-MYB transcription factor gene 5mMYB2 from a transcriptome library produced from MeJAtreated S.mi'/horr/ifza hairy roots.Sm/VIYB2 expression was tightly correlated with the expression of key salvianolic acid biosynthetic genes including CYP^8Ai^.5mMYB2 was highly expressed in the periderm of S.miltiorrhiza and SmMYB2 localized to the nucleus.Overexpressing Sml\AYB2 in S.miltiorrhiza hairy roots significantly increased the levels of salvianolic acids(including rosmarinic acid and salvianolic acid B)by upregulating salvianolic acid biosynthetic genes such as CYP98A14.SmMYB2 binds to the MYB-binding motifs in the promoter of CYP98A14,as confirmed by a dual-luciferase assay and electrophoretic mobility shift assays.Anthocyanin contents were significantly higher in Sm/ViyB2-overexpressing hairy root lines than the control,primarily due to the increased expression of CHI,DFR,and ANS.These findings reveal the novel regulatory role of SmMYB2 in MeJA-mediated phenolic acid biosynthesis,providing a useful target gene for metabolic engineering and shedding light on the salvianolic acid regulatory network. | Changping Deng Yao Wang Fenfen Huang Sunjie Lu Limei Zhao Xingyuan Ma Guoyin Kai | 2020 | Journal of Integrative Plant Biology2020，62，11： | 6 |
| 8 | Protective effects of curcumin against human immunodeficiency virus 1 gp120 V3 loop-induced neuronal injury in rats显示文摘Curcumin improves the learning and memory deficits in rats induced by the gp120 V3 loop. The present study cultured rat hippocampal neurons with 1 nM gp120 V3 loop and 1 μM curcumin for 24 hours. The results showed that curcumin inhibited the gp120 V3 loop-induced mitochondrial membrane potential decrease, reduced the mRNA expression of the pro-apoptotic gene caspase-3, and attenuated hippocampal neuronal injury. | Zheng Gong Lijuan Yang Hongmei Tang Rui Pan Sai Xie Luyan Guo Junbin Wang Qinyin Deng Guoyin Xiong Yanyan Xing Jun Dong | 2012 | Neural Regeneration Research2012，7，3： | 5 |
| 9 | Controlled growth and photoconductive properties of hexagonal SnS2 nanoflakes with mesa-shaped atomic steps显示文摘We demonstrated the controlled growth of two-dimensional (2D) hexagonal tin disulfide (SnS2) nanoflakes with stacked monolayer atomic steps. The morphology was similar to flat-topped and step-sided mesa plateaus or step pyramids. The SnS2 nanoflakes were grown on mica substrates via an atmospheric-pressure chemical vapor deposition process using tin monosulfide and sulfur powder as precursors. Atomic force microscopy (AFM), electron microscopy, and Raman characterizations were performed to investigate the structural features, and a sequential layer-wise epitaxial growth mechanism was revealed. In addition, systematic Raman characterizations were performed on individual SnS2 nanoflakes with a wide range of thicknesses (1-100 nm), indicating that the A1g peak intensity and Raman shifts were closely related to the thickness of the SnS2 nanoflakes. Moreover, photoconductive AFM was performed on the monolayer-stepped SnS2 nanoflakes, revealing that the flat surface and the edges of the SnS2 atomic steps had different electrical conductive properties and photoconductive behaviors. This is ascribed to the dangling bonds and defects at the atomic step edges, which caused a height difference of the Schottky barriers formed at the interfaces between the PtIr-coated AFM tip and the step edges or the flat surface of the SnS2 nanoflakes. The 2D SnS2 crystals with regular monolayer atomic steps and fast photoresponsivity are promising for novel applications in photodetectors and integrated optoelectronic circuits. | Yi Hu Tao Chen Xiaoqi Wang Lianbo Ma Renpeng Chen Hongfei Zhu Xin Yuan Changzeng Yan Guoyin Zhu Hongling Lv Jia Liang Zhong Jin Jie Liu | 2017 | Nano Research2017，10，4： | 5 |
| 10 | Survey on cloud model based similarity measure of uncertain concepts显示文摘It is a basic task to measure the similarity between two uncertain concepts in many real-life artificial intelligence applications,such as image retrieval,collaborative filtering,public opinion guidance,and so on.As an important cognitive computing model,cloud model has been used in many fields of artificial intelligence.It can realise the bidirectional cognitive transformation between qualitative concept and quantitative data based on the theory of probability and fuzzy set.The similarity measure of two uncertain concepts is a fundamental issue in cloud model theory.Popular similarity measure methods of cloud model are surveyed in this study.Their limitations are analysed in detail.Some related future research topics are proposed. | Shuai Li Guoyin Wang Jie Yang | 2019 | CAAI Transactions on Intelligence Technology2019，4，4： | 3 |
| 11 | Numerical Simulation of Warm Forming Behavior of High Strength Aluminum Alloy 7075显示文摘Numerical analysis is critically important to understanding the complex deformation mechanics that occur during sheet forming processes.It has been widely used in simulation of sheet metal forming processes at room temperature in the automotive industry.However,material at elevated temperature behaves more differently than at room temperature and specific material parameters and models need to be developed for the simulation of warm forming.Based on the experimental investigation of material behavior of high strength aluminum alloy 7075(AA7075),constitutive equations with strain rate sensitivity at 140,180 and 220 ℃ are developed.Anisotropic yield criterion Barlat 89 is used in the simulation.Warm forming of limit dome height tests and limit drawing ratio tests of AA7075 at 140,180 and 220℃are performed.Forming limit diagrams developed from experiment at several elevated temperatures in the previous study are used to predict the failure in the simulation results.Punch force and displacement predicted from simulation are compared with the experimental data.Simulation results agree with experimental results,so the developed material model can be used to accurately predict material behavior during isothermal warm forming of the AA7075-T6 alloy. | Wang Hui Yan Dawei Liang Yangmin Xie Guoyin | 2016 | Transactions of Nanjing University of Aeronautics and Astronautics2016，33，5： | 3 |
| 12 | A Multi-granularity Decomposition Mechanism of Complex Tasks Based on Density Peaks显示文摘There are many algorithms for solving complex problems in supervised manner. However, unsupervised tasks are more common in real scenarios. Inspired by the idea of granular computing and the characteristics of human cognitive process, this paper proposes a complex tasks decomposition mechanism based on Density Peaks Clustering(DPC) to address complex tasks with an unsupervised process, which simulates the multi-granular observation and analysis of human being. Firstly, the DPC algorithm is modified to nullify its essential defects such as the difficulty of locating correct clustering centers and classifying them accurately. Then, the improved DPC algorithm is used to construct the initial decomposition solving space with multi-granularity theory. We also define subtask centers set and the granulation rules to guide the multi-granularity decomposing procedure. These rules are further used to decompose the solving space from coarse granules to the optimal fine granules with a convergent and automated process. Furthermore, comprehensive experiments are presented to verify the applicability and veracity of our proposed method in community-detection tasks with several benchmark complex social networks.The results show that our method outperforms other four state-of-the-art approaches. | Ziling Pang Guoyin Wang Jie Yang | 2018 | Big Data Mining and Analytics2018，1，3： | 3 |
| 13 | High-Pressure Experimental Studies on Geo-Liquids Using Synchrotron Radiation at the Advanced Photon Source显示文摘We review recent progress in studying silicate, carbonate, and metallic liquids of geological and geophysical importance at high pressure and temperature, using the large-volume high-pressure devices at the third-generation synchrotron facility of the Advanced Photon Source, Argonne National Laboratory. These integrated high-pressure facilities now offer a unique combination of experimental techniques that allow researchers to investigate structure, density, elasticity, viscosity, and interfacial tension of geo-liquids under high pressure, in a coordinated and systematic fashion. Experimental techniques are described, along with scientific highlights. Future developments are also discussed. | Yanbin Wang Guoyin Shen | 2014 | Journal of Earth Science2014，25，6： | 3 |
| 14 | Curcumin ameliorates hippocampal neuron damage induced by human immunodeficiency virus-1显示文摘Our previous studies have shown that infection with the gp120 V3 loop can cause human immunodeficiency virus-1 associated neurocognitive disorders. Curcumin has been shown to improve these effects to some degree, but the precise mechanisms remain unknown. The present study analyzed the neuroprotective effect and mechanism of curcumin in relation to hippocampal neurons. Results showed that 1 nmol/L gp120 V3 loop suppressed the growth of synapses. After administration of 1 μmol/L curcumin, synaptic growth improved. Curcumin is neuroprotective against gp120 V3 loop-induced neuronal damage by inhibiting the activation of L-type calcium currents, relieving intracellular Ca2+ overload, promoting Bcl-2 expression, and inhibiting Bax activation. The effect of curcumin was identical to nimodipine, suggesting that curcumin has the same neuroprotective effects against gp120 V3 loop-induced neuronal damage. | Hongmei Tang Rui Pan Wenli Fang Yanyan Xing Dexi Chen Xiaobao Chen Yuanyuan Yu Junbing Wang Zheng Gong Guoyin Xiong Jun Dong | 2013 | Neural Regeneration Research2013，8，15： | 3 |
| 15 | 胎儿期恰逢1959~1961年饥荒的中国成人精神分裂症的发病率显示文摘背景:精神分裂症是一种常见的中度精神障碍。子宫内营养缺乏可增大患精神分裂症的危险。其主要依据来自1944~1945年荷兰饥饿冬天(Dutch Hunger Winter)研究,当时食品摄入在短期内极剧下降。这项有关饥荒期间受孕人群的大型队列研究显示,发生精神分裂症的危险增大两倍。
目的:确定经受1959~1961年大饥荒的中国人是否有相似的结果。
设计、地点及参试者:发生精神分裂症危险的调查于安徽省芜湖地区进行,这是当初受灾最重的地区之一。对饥荒之前、饥荒期间和饥荒以后出生的人群发病率进行比较。芜湖及其周围6个县是由一所精神病院负责的。对1971~2001年所有的精神病病历记录均进行检查。精神分裂症患者的临床和社会人口学资料由对自然灾害暴露情况不知情的研究者摘录。有关饥荒年出生人数和死亡人数的数据是有效可用的,累积死亡率根据以后的人口学调查进行估计。
主要观测指标:饥荒的证据已经核实,计算未校正的以及对死亡率进行校正后的发生精神分裂症的相对危险度。
结果:安徽省的出生率(每1000人)在饥荒期问降低了约80%,从1958年的28.28降至1959年的20.97、1960年的8.61和1961年的11.06。在饥荒期间出生的人,晚年发生精神分裂症的校正后危险明显增高,从1959年的0.84%增至1960年的2.15%和1961年的1.81%。死亡率校正相对危险在1960年出生者为2.30(95%可信区间,1.99~2.05),1961年出生者为1.93(95%可信区间,1.68~2.23)。
结论:我们的调查重复了荷兰不同种族人群的数据,结果显示,出生前遭受饥荒可增高晚年患精神分裂症的危险。 | David St Clair Mingqing Xu Peng Wang Yaqin Yu Yourong Fang Feng Zhang Xiaoying Zheng Niufan Gu Guoyin Feng Pak Sham Lin He 张继志(译) | 2006 | 美国医学会杂志(中文版)2006，25，4： | 3 |
| 16 | Intelligent resource allocation in mobile blockchain for privacy and security transactions:a deep reinforcement learning based approach显示文摘In order to protect the privacy and data security of mobile devices during the transactions in the industrial Internet of Things(IIoT),we propose a mobile edge computing(MEC)-based mobile blockchain framework by considering the limited bandwidth and computing power of small base stations(SBSs).First,we formulate a joint bandwidth and computing resource allocation problem to maximize the long-term utility of all mobile devices,and take into account the mobility of devices as well as the blockchain throughput.We decompose the formulated problem into two subproblems to decrease the dimension of action space.Then,we propose a deep reinforcement learning additional particle swarm optimization(DRPO)algorithm to solve the two subproblems,in which a particle swarm optimization algorithm is leveraged to avoid the unnecessary search of a deep deterministic policy gradient approach.Simulation results demonstrate the effectiveness of our method from various aspects. | Zhaolong NING Shouming SUN Xiaojie WANG Lei GUO Guoyin WANG Xinbo GAO Ricky YKKWOK | 2021 | Science China(Information Sciences)2021，64，6： | 3 |
| 17 | The methyl jasmonate-responsive transcription factor SmMYB1 promotes phenolic acid biosynthesis in Salvia miltiorrhiza显示文摘Water-soluble phenolic acids are major bioactive compounds in the medicinal plant species Salvia miltiorrhiza.Phenolic acid biosynthesis is induced by methyl jasmonate(MeJA)in this important Chinese herb.Here,we investigated the mechanism underlying this induction by analyzing a transcriptome library of S.miltiorrhiza in response to MeJA.Global transcriptome analysis identified the MeJA-responsive R2R3-MYB transcription factor-encoding gene SmMYB1.Overexpressing SmMYB1 significantly promoted phenolic acid accumulation and upregulated the expression of genes encoding key enzymes in the phenolic acid biosynthesis pathway,including cytochrome P450-dependent monooxygenase(CYP98A14).Dual-luciferase(dual-LUC)assays and/or an electrophoretic mobility shift assays(EMSAs)indicated that SmMYB1 activated the expression of CYP98A14,as well as the expression of genes encoding anthocyanin biosynthesis pathway enzymes,including chalcone isomerase(CHI)and anthocyanidin synthase(ANS).In addition,SmMYB1 was shown to interact with SmMYC2 to additively promote CYP98A14 expression compared to the action of SmMYB1 alone.Taken together,these results demonstrate that SmMYB1 is an activator that improves the accumulation of phenolic acids and anthocyanins in S.miltiorrhiza.These findings lay the foundation for in-depth studies of the molecular mechanism underlying MeJA-mediated phenolic acid biosynthesis and for the metabolic engineering of bioactive ingredients in S.miltiorrhiza. | Wei Zhou Min Shi Changping Deng Sunjie Lu Fenfen Huang Yao Wang Guoyin Kai | 2021 | Horticulture Research2021，8，1： | 3 |
| 18 | A hydrothermal investigation system for the Qianlong-Ⅱ autonomous underwater vehicle显示文摘Qianlong-Ⅱ is a fully autonomous underwater vehicle designed for the investigation of submarine resources,particularly polymetallic sulfides. It was used to successfully explore hydrothermal fields on the Southwest Indian Ridge. Here, we summarized the exploration of hydrothermal systems using Qianlong-Ⅱ, including detailed descriptions of its implementation along with the systems used for data management and fast mapping. We also introduced a method to remove platform magnetic interference using magnetic data while Qianlong-Ⅱ is spinning. Based on hydrothermal anomalies collected by Qianlong-Ⅱ, we developed a rapid method for locating hydrothermal vents. Taking one dive as an example, we systemically demonstrated the process for analyzing hydrothermal survey data to locate hydrothermal vents. | Tao Wu Chunhui Tao Jinhui Zhang Ao Wang Guoyin Zhang Jianping Zhou Xianming Deng | 2019 | Acta Oceanologica Sinica2019，38，3： | 2 |
| 19 | High-performance Li-ion capacitor based on black-TiO2-x/graphene aerogel anode and biomass-derived microporous carbon cathode显示文摘Lithium-ion capacitor (LIC) has been regarded as a promising energy storage system with high powder density and high energy density.However,the kinetic mismatch between the anode and the cathode is a major issue to be solved.Here we report a high-performance asymmetric LIC based on oxygen-deficient black-TiO2-x/graphene (B-TiO2-x/G) aerogel anode and biomass derived microporous carbon cathode.Through a facile one-pot hydrothermal process,graphene nanosheets and oxygen-vacancy-rich porous B-TiO2-x/G nanosheets were self-assembled into three-dimensional (3D) interconnected B-TiO2-x/G aerogel.Owing to the rich active sites,high conductivity and fast kinetics,the B-TiO2-x/G aerogel exhibits remarkable reversible capacity,high rate capability and long cycle life when used as anode material for lithium ion storage.Moreover,density functional theory (DFT) calculation reveals that the incorporation of graphene nanosheets can reduce the energy barrier of Li^+ diffusion in B-TiO2-x.The asymmetric LIC based on B-TiO2-x/G aerogel anode and naturally-abundant pine-needles derived microporous carbon (MPC) cathode work well within a large voltage window (1.0-4.0 V),and can deliver high energy density (166.4 Wh·kg^-1 at 200 mA·g^-1),and high power density (7.9 kW·kg^-1 at 17.1 Wh·kg^-1).Moreover,the LIC shows a high capacitance retention of 87% after 3,000cycles at 2,000 mA·g^-1.The outstanding electrochemical performances indicate that the rationally-designed LICs have promising prospect to serve as advanced fast-charging energy storage devices. | Guoyin Zhu Lianbo Ma Huinan Lin Peiyang Zhao Lei Wang Yi Hu Renpeng Chen Tao Chen Yanrong Wang Zuoxiu Tie Zhong Jin | 2019 | Nano Research2019，12，7： | 2 |
| 20 | Three-dimensional spongy framework as superlyophilic, strongly absorbing,and electrocatalytic polysulfide reservoir layer for high-rate and long-cycling lithiumsulfur batteries显示文摘In the development of lithium-sulfur (Li-S)batteries,various approaches have been adopted to enhance the electronic conductivity of the sulfur cathode and alleviate the shuttle effect of polysulfides;however,the strategies providing efficient solutions are still limited.To further improve the electrochemical performance of Li-S batteries,in this work we propose a new strategy involving the incorporation of a three-dimensional functional spongy framework as polysulfide reservoir layer,with strong absorbability and electrocatalytic activity towards sulfur species.The spongy framework has a hierarchical architecture composed of highly conductive Ni foam/graphene/carbon nanotubes/MnO2nanoflakes (NGCM).The strongly interconnected Ni foam,graphene,and carbon nanotubes of the NGCM sponge facilitate electron transfer during discharge/charge processes;moreover,the superlyophilic properties of the NGCM sponge ensure good wettability and interface contact with the Li-S electrolyte,and the porous MnO2nanoflakes provide strong chemisorptive and electrocatalytic effects on polysulfides (as confirmed theoretically and experimentally).The NGCM sponge, serving as a polysulfide reservoir layer attached on a conventional sulfur-mixed carbon nanotubes (S/CNTs)cathode,can provide improved reversible capacity, rate capability (593mAh·g^-1at 3.0C),and cycling stability.In addition,the self-discharge rate is greatly reduced,owing to the efficient conservation of polysulfides in the NGCM spongy framework. | Lianbo Ma Guoyin Zhu Wenjun Zhang Peiyang Zhao Yi Hu Yanrong Wang Lei Wang Renpeng Chen Tao Chen Zuoxiu Tie Jie Liu Zhong Jin | 2018 | Nano Research2018，11，12： | 2 |
您所在的机构暂未开通此部分的功能，请联系管理员