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35篇 您的检索式:作者名="Xianli Xu"
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1Novel Insights into Energy Storage Mechanism of Aqueous Rechargeable Zn/MnO2 Batteries with Participation of Mn2+显示文摘Aqueous rechargeable Zn/MnO2 zinc-ion batteries(ZIBs)are reviving recently due to their low cost,non-toxicity,and natural abundance.However,their energy storage mechanism remains controversial due to their complicated electrochemical reactions.Meanwhile,to achieve satisfactory cyclic stability and rate performance of the Zn/MnO2 ZIBs,Mn2+ is introduced in the electrolyte(e.g.,ZnSO4 solution),which leads to more complicated reactions inside the ZIBs systems.Herein,based on comprehensive analysis methods including electrochemical analysis and Pourbaix diagram,we provide novel insights into the energy storage mechanism of Zn/MnO2 batteries in the presence of Mn2+.A complex series of electrochemical reactions with the coparticipation of Zn2+,H+,Mn2+,SO42-,and OH-were revealed.During the first discharge process,co-insertion of Zn2+ and H+ promotes the transformation of MnO2 into ZnxMnO4,MnOOH,and Mn2O3,accompanying with increased electrolyte pH and the formation of ZnSO4·3 Zn(OH)2-5 H2O.During the subsequent charge process,ZnxMnO4,MnOOH,and Mn2O3 revert to a-MnO2 with the extraction of Zn2+ and H+,while ZnSO4·3Zn(OH)2·5H2O reacts with Mn2+ to form ZnMn3O7·3 H2O.In the following charge/discharge processes,besides aforementioned electrochemical reactions,Zn2+ reversibly insert into/extract from α-MnO2,ZnxMnO4,and ZnMn3O7·3H2O hosts;ZnSO4·3Zn(OH)2·5 H2O,Zn2Mn3O8,and ZnMn2O4 convert mutually with the participation of Mn2+.This work is believed to provide theoretical guidance for further research on high-performance ZIBs.Yongfeng Huang Jian Mou Wenbao Liu Xianli Wang Liubing Dong Feiyu Kang Chengjun Xu 2019Nano-Micro Letters2019,11,3:11
2Hysteresis in sap flow and its controlling mechanisms for a deciduous broad-leaved tree species in a humid karst region显示文摘The critical zone(CZ) represents the intersection of the biosphere with the atmosphere, hydrosphere and lithosphere.Understanding the hydrological processes and human impact factors on the CZ is fundamental to sustainable water resources management for agroforestry. Transpiration(T) is an important component of terrestrial evapotranspiration(ET), and understanding the time lag(TL) between vegetation transpiration and meteorological factors can improve our knowledge of the mechanisms of vegetation adaptability to a changing environment. However, the controlling factors on the TL remain poorly understood. Therefore, the objective of this study is identifying the temporal dynamics of key controlling factors on the TL, using a typical deciduous broad-leaved tree species(Zenia insigins Chun) of CZ in subtropical humid karst regions. This species is used as an example to explore the characteristics of the TL between SF(sap flow) and hydro-meteorological forcing. Sap flow in these 6 trees was monitored using the thermal dissipation probes(TDP). Results showed that:(1) the peak of diurnal sap flow generally lagged behind PAR but preceded Ta(air temperature), RH(relative humidity) and VPD(vapor pressure deficit), with the mean TL of-67.4 min(PAR), 90.5 min(Ta), 91.6 min(RH) and 92.9 min(VPD), respectively;(2) TL had no significant relationships with the daily mean meteorological factors and soil moisture, but was highly(R^2>0.66) correlated to CRs(changing rates of meteorological factors) in the morning;(3) At seasonal scale, the sap flow rate and TL both were controlled by the seasonality of precipitation and temperature. Overall, the seasonality of the TL was caused by plants' high water loss and strongly active physiological response in hot seasons, leading to close stomata earlier than in cold seasons;(4) The reason why CRs proposed can explain the TL better than mean values of metrological factors is that the CRs considered the distribution and change processes of metrological factors in the daytime. This study may be helpful for understanding the physiological response of vegetation to climatic change, and may be useful for constructing models to simulate transpiration processes more accurately during a day.Rongfei ZHANG Xianli XU Meixian LIU Yaohua ZHANG Chaohao XU Ruzhou YI Wei LUO Chris SOULSBY 2019Science China Earth Sciences2019,62,11:9
3Polybrominated diphenyl ether (PBDE) in blood from children (age 9–12) in Taizhou, China显示文摘Polybrominated diphenyl ethers (PBDEs) as ubiquitous persistent organic pollutants have attracted much attention in recent years. Exposure to PBDEs could induce a high health risk for children. The aim of this study was to investigate the PBDEs exposure of children (9–12 years) from Taizhou, China. Fifty-eight blood samples were collected in one school in a mountainous area in Taizhou. The concentrations of ∑9PBDEs (sum of BDE-28, -47, -99, -100, -153, -154, -183, -197 and -209) ranged from 2.66 to 33.9 ng/g lipid wet (lw) with a median of 7.22 ng/g lw. These concentrations were lower than those of children in USA, but close to European and Asian general population levels. The results showed that children in Taizhou countryside were at a low level of PBDEs exposure. The predominant congener was BDE-209, followed by BDE-28, -47, -197 and -153. High abundance of BDE-209 was consistent with the pollution background of PBDEs in China characterized by high brominated congeners as main pollutants.Xiaoyou Zhang Xianli Ruan Minchan Yan Yaxian Zhao Wuji Wei Zhanfen Qin Yongjian Yang Haiming Xu Yan Li 2011Journal of Environmental Sciences2011,23,7:5
4High-Performance Aqueous Zinc-Ion Batteries Realized by MOF Materials显示文摘Rechargeable aqueous zinc-ion batteries(ZIB s) have been gaining increasing interest for large-scale energy storage applications due to their high safety,good rate capability,and low cost.However,the further development of ZIB s is impeded by two main challenges:Currently reported cathode materials usually suffer from rapid capacity fading or high toxicity,and meanwhile,unstable zinc stripping/plating on Zn anode seriously shortens the cycling life of ZIBs.In this paper,metal-organic framework(MOF) materials are proposed to simultaneously address these issues and realize high-performance ZIB s with Mn(BTC) MOF cathodes and ZIF-8-coated Zn(ZIF-8@Zn) anodes.Various MOF materials were synthesized,and Mn(BTC) MOF was found to exhibit the best Zn^2+-storage ability with a capacity of 112 mAh g^-1.Zn^2+ storage mechanism of the Mn(BTC) was carefully studied.Besides,ZIF-8@Zn anodes were prepared by coating ZIF-8 MOF material on Zn foils.Unique porous structure of the ZIF-8 coating guided uniform Zn stripping/plating on the surface of Zn anodes.As a result,the ZIF-8@Zn anodes exhibited stable Zn stripping/plating behaviors,with 8 times longer cycle life than bare Zn foils.Based on the above,high-performance aqueous ZIBs were constructed using the Mn(BTC) cathodes and the ZIF-8@Zn anodes,which displayed an excellent long-cycling stability without obvious capacity fading after 900 charge/discharge cycles.This work provides a new opportunity for high-performance energy storage system.Xuechao Pu Baozheng Jiang Xianli Wang Wenbao Liu Liubing Dong Feiyu Kang Chengjun Xu 2020Nano-Micro Letters2020,12,11:5
5Spatial Distribution of Land Cover and Vegetation Activity along Topographic Gradient in an Arid River Valley, SW China显示文摘Anthropogenic activities have become more and more important in characterizing the landscape, but their impacts are still restricted by natural environments. This paper discusses the interactions of anthropogenic activity, vegetation activity and topography through describing the spatial distribution of land cover and vegetation activity (represented by Normalized Difference Vegetation Index, NDVI) along topographic gradient in a mountainous area of southwestern China. Our results indicate that the existing landscape pattern is controlled by anthropogenic activities as well as topographic factors. Intensive anthropogenic activities mainly occur in areas with relatively low elevation, gentle and concave slopes, as these areas are easy and convenient to attain for human. Because of the destruction by human, some land cover types (mainly grassland and shrub) are only found in relatively harsher environments. This study also finds that topographic wetness index (W) used in other places only reflects runoff generation capacity, but not indicate the real spatial pattern of soil water content in this area. The relationships between NDVI and W, and NDVI and length slope factor (LSF) show that runoff and erosion have complex effects on vegetation activity. Greater values of W and LSF will lead to stronger capacity to produce runoff and transport sediment, and thereby increase soil water content and soil deposition, whereas beyond a certain threshold runoff and erosion are so strong that they would destruct vegetation growth. This study provides information needed to successfully restore native vegetation, improve land management, and promote sustainable development in mountainous areas, especially for developing regions.LIU Wen XU Xianli LUO Jiancheng SHEN Zhanfeng ZHONG Qiuhai 2009Journal of Mountain Science2009,6,3:2
6Preliminary study on photoproduction of hydroxyl radicals in aqueous solution with Aldrich humic acid, algae, and Fe ( Ⅲ ) under high - pressure mercury lamp irradiation 显示文摘Liu Xianli Xu Dong Wu Feng 2004Photochemistry and Photobiology2004,79,3:1
7Controlling the lateral and vertical dimensions of Bi2Se3 nanoplates via seeded growth显示文摘nanostructures 的形态学的调整经常是一项令人满意却挑战性的任务。我们采用了播种生长方法并且导致了运动控制综合双性人 < 潜水艇 class= “ a-plus-plus ” > 2 Se < 潜水艇 class= “ a-plus-plus ” > 有可修改的形态学的 3 nanoplates。由操作先锋答案与注射泵在被注入种子答案的率,二个特殊生长模式能被认识到。与快注射,双性人的厚度<潜水艇class=“ a-plus-plus ”> 2 Se <潜水艇class=“ a-plus-plus ”>当边长度从 160 nm (种子)长大了到 12 m 时, 3 nanoplates 稍微从 7.5 nm (种子)增加了到 9.5 nm ,在播种生长的 6 个连续回合以后。与慢注射,厚度和边长度分别地在 6 轮生长以后同时增加了到 35 nm 和 6 m。这二个模式能被看作在原子免职和表面移植之间的一场比赛。产品出现了有趣,厚度依赖者拉曼性质。另外, NIR 透明,高度传导性、灵活的双性人<潜水艇class=“ a-plus-plus ”> 2 Se <潜水艇class=“ a-plus-plus ”> 3 有不同厚度的薄电影被同样综合的双性人的集会构造<潜水艇class=“ a-plus-plus ”> 2 Se <潜水艇class=“ a-plus-plus ”> 3 nanoplates 。这条途径能显著地与多样的形态学基于播种生长和运动控制支持万用的 nanostructures 的发展。Awei Zhuang Yuzhou Zhao Xianli Liu Mingrui Xu Youcheng Wang Unyong Jeong Xiaoping Wang Jie Zeng 2015Nano Research2015,8,1:1
8Runoff and watererosion on road side-slopes:Effects of rainfallcharacteristics and slope length显示文摘Xu Xianli Liuwen Kong Yaping 2009TransportationResearch Part D:Transport and Environment2009,14,7:1
9Soil erodibility and its estimation for agricultural soils in China显示文摘Zhang Keli Shu Anping Xu Xianli 2008Jour- nal of Arid Environments2008,72,6:1
10Local and global factors controlling water-energy balances within the Budyko framework 显示文摘XU Xianli LIU Wen BRIDGET R S 2013Geophysical Research Letters2013,40,:1
11Low frequency and intensity ultrasound induces apoptosis of brain glioma in rats mediated by caspase-3, Bcl-2, and survivin显示文摘Zhen Zhang Jiang Chen Lufeng Chen Xianli Yang Hongshan Zhong Xun Qi Yonghua Bi Ke Xu 2012Brain Research2012,,:1
12Effectiveness of erosion control measures along the Qinghai-Tibet highway, Tibetan plateau, China显示文摘Xianli Xu Keli Zhang Yaping Kong Jiding Chen Bofu Yu 2006Transportation Research Part D2006,,11:1
13Few-layer Ti3C2Tx MXene delaminated via flash freezing for high-rate electrochemical capacitive energy storage显示文摘Few-layer Ti3C2Tx MXene is synthesized from multi-layered Ti3C2Tx via a flash freezing-assisted delamination process.During the flash freezing process,the water molecules in the interlayers of multi-layered MXene are induced to rearrange and produce volume expansion,thus notably expand the MXenes’interlayer distance to form few-layer MXene.The synthesized few-layer Ti3C2Tx MXene nanosheets display a very small thickness(less than 5 Ti3C2 atom-layers)and expanded interlayer spacing.Consequently,the few-layer Ti3C2Tx exhibits enhanced capacitance(255 F g^-1 vs.177 F g^-1 for the multi-layered Ti3C2Tx)and significantly optimized rate capability(150 F g^-1 at 200 mV s^-1 vs.25 F g^-1 for the multi-layered Ti3C2Tx),because redox-active sites in the few-layer MXene are easily accessible to electrolyte ions.Moreover,an asymmetric supercapacitor is constructed using the few-layer Ti3C2Tx negative electrode and an activated carbon fiber positive electrode.The asymmetric supercapacitor presents a high energy density of 17.9 Wh kg^-1 and a high power density of 14 kW kg^-1,which is inseparable from its wide voltage window of 1.4 V and the good rate performance of the few-layer Ti3C2Tx MXene electrode.Overall,the flash freezing-assist delamination provides an effective and environmental-friendly strategy to synthesize few-layer MXene materials for high-rate electrochemical energy storage.Xianli Wang Liubing Dong Wenbao Liu Yongfeng Huang Xuechao Pu Jinjie Wang Feiyu Kang Jia Lia Chengjun Xu 2020Journal of Energy Chemistry2020,29,9:1
14Is southwestern China experiencing more frequent precipitation extremes?显示文摘Meixian Liu Xianli Xu Alexander Y Sun Kelin Wang Wen Liu Xiaoyan Zhang 2014Environmental Research Letters2014,,6:1
15Runoff and water erosion on road side-slopes: effects of rainfall characteristics and slope length 显示文摘Xu Xianli Liu Wen Kong Yaping 2009Transportation Re- search Part D: Transport and Environment2009,14,7:1
16AhR expression is increased in hepatocellular carcinoma显示文摘Ziyu Liu Xing’an Wu Fanglin Zhang Lurong Han Guoqiang Bao Xianli He Zhikai Xu 2013Journal of Molecular Histology2013,,4:1
17Adipose-derived stem cells in stroke treatment: translational possibility and mechanism显示文摘Stroke has become one of the secondary worldwide mortal diseases that burdens the family and the society both emotionally and economically.The announcement of China's Ministry of Health in 2008 showed that stroke had been the first cause of death in urban and rural residents.1,2 Traditional therapies such as thrombolysis,anti-platelets,and rehabilitation showed limited effects.Replacement therapy with stem cells promises to be a good solution due to its possible thorough therapy for the damaged brain area,reconstruction of neuronal circuitry,and probable long-term efficacy.Zhou Fei Gao Shan'e Sun Chenxi Cao Limei Ren Haiyan Li Qiang Wang Guangming Dong Chuanming Zhu Liang Yang Danjing Wang Xianli Xu Jun Chen Xu 2014Chinese Medical Journal2014,,20:1
18Relationships between vegetation and soil and topography in a dry warm river valley, SW China显示文摘Xu Xianli Ma Keming Fu Bojie 2008Catena2008,75,2:1
19TRAP markers generated with resistant gene analog sequences and their application to genetic diversity analysis of radish germplasm显示文摘Dandan Cheng Fenjiao Zhang Liwang Liu Liang Xu Yinglong Chen Xianli Wang Cecilia Limera Rugang Yu Yiqin Gong 2013Scientia Horticulturae2013,,:1
20 -coloring of Kn,n显示文摘Xu Changqing Ma Xianli Hua Shouliang 2009J Appl Math Comput2009,31,:1
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