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| 1 | Cooperation of nitrogen-doping and catalysis to improve the Li-ion storage performance of lignin-based hard carbon显示文摘Hard carbon draws great interests as anode material in lithium ion batteries(LIBs)due to its high theoretical capacity,high rate capability and abundance of its precursors.Herein we firstly synthesize the lignin-melamine resins by grafting melamine onto lignin.Afterwards,nitrogen doped hard carbon is prepared by the pyrolysis of lignin-melamine resins with the aid of catalyst(Ni(NO_3)_2·6H_2O)at 1000°C.Compared with the samples without nitrogen-doping and catalysis,as-prepared nitrogen doped hard carbon exhibits higher reversible capacity(345 mAh g^(–1)at 0.1 A g^(-1)),higher rate capability(145 mAh g^(-1)at 5 A g^(–1))and excellent cycling stability.The superior electrochemical performance is ascribed to the synergistic effect of nitrogen doping,graphitic structure and amorphous structure.Among them,nitrogen doping could create the vacancies around the nitrogen sites,which enhance the reactivity and the electronic conductivity of materials.Additionally,graphitic structure also enhances the electronic conductivity of materials,thus improving the electrochemical performance of hard carbon.It is worthwhile that lignin,renewable and abundant biopolymer,is converted to hard carbon with good electrochemical performance,which realizes the high value utilization of lignin. | Zhewei Yang Huajun Guo Feifei Li Xinhai Li Zhixing Wang Lizhi Cui Jiexi Wang | 2018 | Journal of Energy Chemistry2018，27，5： | 5 |
| 2 | Preheating method of lithium-ion batteries in an electric vehicle显示文摘To improve the low-temperature charge-discharge performance of lithium-ion battery,low-temperature experiments of the charge-discharge characteristics of 35 Ah high-power lithium-ion batteries have been conducted,and the wide-line metal film method for heating batteries is presented.At-40℃,heating and charge-discharge experiments have been performed on the battery pack.The results indicate the charge-discharge performance is substantially worse in cold climates,and can be significantly improved by heating the battery pack with a wide-line metal film.Pulse charge-discharge experiments show that at-40℃ambient temperature,the heated battery pack can charge or discharge at high current and offer almost80%power. | Zhiguo LEI Chengning ZHANG Junqiu LI Guangchong FAN Zhewei LIN | 2015 | Journal of Modern Power Systems and Clean Energy2015，3，2： | 2 |
| 3 | Photoluminescence of carbon quantum dots:coarsely adjusted by quantum confinement effects and finely by surface trap states显示文摘Photoluminescence(PL) mechanism of carbon quantum dots(CQDs) remains controversial up to now even though a lot of approaches have been made. In order to do that, herein a PL color ladder from blue to near infrared of CQDs with the absolute quantum yields higher than 70% were prepared via a one-pot hydrothermal synthesis route and separated by silica gel column.Time-correlated single photon counting measurements suggest that the electron transition takes in effect in the PL progress of the crystalline core-shell structured CQDs, and the PL properties could be coarsely adjusted by tuning the size of the crystalline carbon core owing to quantum confinement effects, and finely adjusted by changing the surface functional groups consisted shell owing to surface trap states,respectively. Both coarse and fine adjustments of PL, as optical and photoelectrical characterizations and density-functional theory(DFT) calculations have demonstrated, make it possible for top-level design and precise synthesis of new CQDs with specific optical properties. | Zexi Liu Hongyan Zou Ni Wang Tong Yang Zhewei Peng Jian Wang Na Li Chengzhi Huang | 2018 | Science China Chemistry2018，61，4： | 1 |
| 4 | Nanoscale Crystalline Sheets and Vesicles Assembled from Nonplanar Cyclic π-Conjugated Molecules显示文摘A fundamental challenge in chemistry and materials science is to create new carbon nanomaterials by assembling structurally unique carbon building blocks,such as nonplanar π-conjugated cyclic molecules.However,self-assembly of such cyclic π-molecules to form organized nanostructures has been rarely explored despite intensive studies on their chemical synthesis.Here we synthesized a family of new cycloparaphenylenes and found that these fully hydrophobic and nonplanar cyclic π-molecules could self-assemble into structurally distinct two-dimensional crystalline multilayer nanosheets.Moreover,these crystalline multilayer nanosheets could overcome inherent rigidity to curve into closed crystalline vesicles in solution.Tese supramolecular assemblies show that the cyclic molecular scafolds are homogeneously arranged on the surface of nanosheets and vesicles with their molecular isotropic x-y plane standing obliquely on the surface.Tese supramolecular architectures that combined exact crystalline order,orientation-specifc arrangement of π-conjugated cycles,controllable morphology,uniform molecular pore,superior forescence quench ability,and photoluminescence are expected to give rise to a new class of functional materials displaying unique photonic,electronic,and biological functions. | Huang Tang Zhewei Gu Haifeng Ding Zhibo Li Shiyan Xiao Wei Wu Xiqun Jiang | 2019 | Research2019，，1： | 0 |
| 5 | Determination of the cluster spectroscopic factor of the 10.3 MeV state in ^(12)Be显示文摘From an inelastic excitation and breakup experiment with a12Be beam at 29 MeV/u,a large4He+8He cluster decay width of 1.1(2)MeV is determined for a state at an excitation energy of 10.3 MeV and with a spin parity of 0+.By using the R-matrix analysis,a cluster spectroscopic factor of 0.53(10)is extracted from the cluster partial width,providing a strong support for the clustering structure in12Be.A specially designed zero-degree telescope played an essential role in the present experiment and has been demonstrated to be a promising tool in future studies of the molecular-like resonances near the cluster separation threshold. | YANG ZaiHong YE YanLin LI ZhiHuan LOU JianLin XU FuRong PEI JunCheng TIAN ZhengYang LI KuoAng SUN YeLei CHEN Jie LI Jing JIANG Wei YANG Biao CHEN SiDong LIU Qiang ZANG HongLiang FENG Jun YIN ZheWei | 2014 | Science China(Physics,Mechanics & Astronomy)2014，57，9： | 0 |
| 6 | Expression of GDF-5 during Limb Skeletal Development of Mice and the effect of GDF-5 on bone marrow mesenchymal stem cells in vitro显示文摘Objective: To investigate the expression of growth differentiation factor 5(GDF-5) during limb skeletal development of mice and the effect of GDF-5 on bone marrow mesenchymal stem cells in vitro. Methods: The expression of GDF-5 mRNA and protein in mouse fetal limb buds were detected in embryonic day 11.5-15.5(E11.5-15.5) by RT-PCR and Western blotting respectively. Type Ⅱ collagen protein was examined with immunocytochemistry and the sulfate glycosaminoglycan was measured by Alcian blue. Results: During early stage of developmental skeletogenesis, the expression of GDF-5mRNA was constant and began with embryos E11.5, highlighted at embryos E12.5 and E13.5, subsequently dropped at embryos E14.5 and E15.5. There was very significant difference(P < 0.01) in average light density ratio of GDF-5/β-actin between E12.5-13.5 and the other three days. The expression of GDF-5 protein had a similar change with mRNA during limb skeletogenesis. Immunocytochemistry showed that GDF-5 could promote expression of Type Ⅱ collagen protein and histological staining of proteoglycan with Alcian blue revealed the deposition of typical cartilage extracellular matrix components. Conclusion: GDF-5 can enhance chondrogenic differentiation of mouse bone marrow mesenchymal stem cells in vitro, which plays an important role in limb skeletal development and joint formation. | Yukun Zhang Shuhua Yang Li Sun Cao Yang Zhewei Ye Dehao Fu | 2006 | Journal of Nanjing Medical University2006，20，6： | 0 |
| 7 | 靶向eIF4AI的N-末端抑制其催化循环显示文摘文章简介蛋白翻译是中心法则的最后一环,是控制细胞内蛋白质稳态的关键生命过程。蛋白翻译起始是整个翻译过程中最关键的限速步骤,翻译过程的失调与神经发育类疾病以及恶性肿瘤等多种疾病密切相关。真核蛋白翻译起始因子eIF4A是最早被发现的DEAD盒(DEAD-box)RNA解旋酶超家族成员。 | 蒋晨晓 汤叶根 丁露露 Renke Tan Xiaojing Li Junyan Lu Jing Jiang Zhaomeng Cui Zhewei Tang Wei Li Zhangjun Cao Tilman Schneider-Poetsch Wei Jiang Cheng Luo 丁滪 刘建伟 党永军 | 2020 | 科学新闻2020，，2： | 0 |
| 8 | Resource Allocation in D2D-Aided High-Speed Railway Wireless Communication Systems: A Matching Theory Approach显示文摘With the rapid deployment of high speed railway(HSR) worldwide,both safety operation and comfort experience can be desired to evolve into a future era of intelligent transportation system.To eliminate boredom and provide entertainment for passengers,an intranet for internal communications among passengers named as onboard social network system(SNS) is needed.In this paper,the latest progress in HSR network architectures and technology building blocks are discussed to enable the implementation of the SNS.Meanwhile,based on the device-to-device(D2 D) communication technology for proximal information interaction,SNS can be efficiently facilitated.A dynamic resource allocation algorithm is proposed to maximize the total utility of the onboard SNS,which is solved with the matching theory method.Simulation results verify the convergence and efficiency of the proposed algorithm. | Meilin Gao Bo Ai Yong Niu Zhewei Zhang YanqingXu Dapeng Li | 2017 | China Communications2017，14，12： | 0 |
| 9 | Synthesis of uniform two-dimensional MoS_(2) films via thermal evaporation显示文摘Two-dimensional(2D)molybdenum disulfide(MoS_(2))holds great potential for various applications such as electronic devices,catalysis,lubrication,anti-corrosion and so on.Thermal evaporation is a versatile thin film deposition technique,however,the conventional thermal evaporation techniques face challenges in producing uniform thin films of MoS_(2) due to its high melting temperature of 1375℃.As a result,only thick and rough MoS_(2) films can be obtained using these methods.To address this issue,we have designed a vacuum thermal evaporation system specifically for large-scale preparation of MoS_(2) thin films.By using K2MoS4 as the precursor,we achieved reliable deposition of uniform polycrystalline MoS_(2) thin films with a size of 50 mm×50 mm and controllable thickness ranging from 0.8 to 2.4 nm.This approach also allows for patterned deposition of MoS_(2) using shadow masks and sequential deposition of MoS_(2) and tungsten disulfide(WS_(2)),similar to conventional thermal evaporation techniques.Moreover,we have demonstrated the potential applications of the obtained MoS_(2) thin films in field effect transistors(FETs),memristors and electrocatalysts for hydrogen evolution reaction(HER). | Xue-Wei Lu Zhewei Li Chen-Kai Yang Weijia Mou Liying Jiao | 2024 | Nano Research2024，17，4： | 0 |
| 10 | Atmospheric Degradation and Performance Recovery of Two-Dimensional MoS2 Field Effect Transistor显示文摘Two-dimensional(2D)transition metal dichalcogenides(TMDCs)showed great potentials in 2D nanoelectronic devices due to their abundant and unique properties.The performance stability of the 2D TMDCs devices turns into one of the keys for their practical applications but has been rarely explored.Here,we investigated stability of MoS_(2)devices in ambient condition and contributed the device performance degradation to the surface oxidation of the contact metals with low work function,which increased the contact barrier and hindered the electron injection.We developed a new approach to recover the performance of the aged devices through the selective doping of contacts with organolithium,which prolonged the lifetime of MoS_(2)devices.Our work not only provides important insights into the stability of 2D TMDCs devices,but also opens up a new avenue for optimizing the performance of 2D MoS_(2)devices. | Lifei Sun Zhixing Lu Rui Xu Zhewei Li Guanchen Xu Fengen Chen Zhihai Cheng Liying Jiao | 2023 | Chinese Journal of Chemistry2023，41，21： | 0 |
| 11 | Self-Assembly of Crystalline Vesicles from Nonplanarπ-Conjugated Nanocycles显示文摘There is a great demand for self-assembled carbon nanomaterials because of their importance in optoelectronics,biomaterials,and so forth.Herein,we report a novel type of self-assembled,nanoscale,crystalline vesicle from nonplanarπ-conjugated nanocycles.We designed four different structural[8]cycloparaphenylenes([8]CPPs)molecules and demonstrated that these nonplanarπ-conjugated CPP nanocycles could self-assemble into multilamellar,crystalline vesicles in tetrahydrofuran(THF)/H2O mixed solvent. | Huang Tang Zhewei Gu Chengyang Qiao Zhibo Li Wei Wu Xiqun Jiang | 2021 | CCS Chemistry2021，3，7： | 0 |
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