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| 1 | The role of oxygen vacancies in the high cycling endurance and quantum conductance in BiVO4-based resistive switching memory显示文摘Resistive random access memory(RRAM)has emerged as a new discipline promoting the development of new materials and devices toward a broad range of electronic and energy applications.Here,we realized a memristive device with weak dependence on the top electrodes and demonstrated the quantized conductance(QC)nature in BiVO4 matrix.The electronic properties have been investigated by the measurements of I-V curves,where the resistive switching(RS)phenomenon with stable switching ratio and excellent longterm retention capabilities are identified.Two more inert materials,TiN and Pd,are applied as the top electrodes to exclude the influence of electrodes on the RS states and QC behavior.The X-ray photoelectron spectroscopy results and transport measurements reveal that the conductive filament(CF)is composed by elemental bismuth.The naturally existed oxygen vacancies in BiVO4 matrix plays as the role of catalyst in the formation and dissolution of CF in BiVO4-based RRAM device,which is the primary cause for the observed weak dependence of switching performance in this device on the type of top electrodes.Our results clearly illustrate that BiVO4 could be a new idea platform to realize the high scalability,high cycling endurance,and multilevel storage RRAM devices. | Mengting Zhao Xiaobing Yan Long Ren Mengliu Zhao Fei Guo Jincheng Zhuang Yi Du Weichang Hao | 2020 | InfoMat2020，2，5： | 2 |
| 2 | Hunting Sodium Dendrites in NASICON-BasedSolid-State Electrolytes显示文摘NASICON-(Na superionic conductor-)based solid-state electrolytes(SSEs)are believed to be attracting candidates for solid-state sodium batteries due to their high ionic conductivity and prospectively reliable stability.However,the poor interface compatibility and the formation of Na dendrites inhibit their practical application.Herein,we directly observed the propagation of Na dendrites through NASICON-based Na3.1Zr2Si2.1P0.9O12 SSE for the first time.Moreover,a fluorinated amorphous carbon(FAC)interfacial layer on the ceramic surface was simply developed by in situ carbonization of PVDF to improve the compatibility between Na metal and SSEs.Surprisingly,Na dendrites were effectively suppressed due to the formation of NaF in the interface when molten Na metal contacts with the FAC layer.Benefiting from the optimized interface,both the Na||Na symmetric cells and Na3V2(PO4)3||Na solidstate sodium batteries deliver remarkably electrochemical stability.These results offer benign reference to the maturation of NASICON-based solid-state sodium batteries. | Qiangqiang Zhang Yaxiang Lu Weichang Guo Yuanjun Shao Lilu Liu Jiaze Lu Xiaohui Rong Xiaogang Han Hong Li Liquan Chen Yong-Sheng Hu | 2021 | Energy Material Advances2021，，1： | 1 |
| 3 | Electroless copper coating on nickel foils in super-gravity field显示文摘 | Gong Yingpeng Guo Zhancheng Lu Weichang | 2005 | Mater Lett2005，，59： | 1 |
| 4 | Current Status and Countermeasures of Forestry Cooperative Organization in China显示文摘From three different historical phases, the article summarizes the development process on forestry cooperative organizations in China since 1949, and analyses the types, functions and existing problems of current forestry cooperative organizations. Drawing on the experience of other countries for reference, the authors bring forward policy suggestions on facilitating the development of forestry cooperative organizations and strengthening standardized management. | WANG Dengju LI Weichang GUO Guangrong | 2007 | Chinese Forestry Science and Technology2007，6，3： | 0 |
| 5 | Electrode structure enabling dendrite inhibition for high cycle stability quasi-solid-state lithium metal batteries显示文摘Lithium(Li)metal batteries(LMBs)are widely regarded as the ultimate choice for the next generation of high-energy–density batteries.However,the uncontrollable growth of Li dendrites formed by inhomogeneous deposition seriously hinders its commercialization.Although many studies have achieved significant results in inhibiting the formation of Li dendrites,it is still impossible to eradicate them completely.Therefore,regulating the deposition behavior,such as the growth direction of unevenly deposited Li,is preferable to unilaterally suppressing them in some cases.Here we report a structured anode that can confine the deposited Li within holes and tune it to become vertical-up/horizontal-centripetal mixed growth mode by optimizing the electric field/Li^(+)concentration gradient.The Li^(+) adsorbed by the poly(amic acid)(PAA)insulating layer coated on the anode surface can form the Li^(+)concentration gradient pointing to the center of the hole.Combined with the special electric field formed by the hole structure,it is favorable for the Li^(+)to move into the vertically arrayed holes and simultaneously deposit on the bottom and walls.Furthermore,both in-situ and ex-situ observations confirm that the growth mode is changed and the Li deposition morphology is denser,which can greatly delay capacity fading and prolong cycle life in both liquid and quasi-solid-state LMBs.All the results show that the novel anode provides a new perspective for deep research into solid-state LMBs. | Kaiming Wang Ao Yu Zhiyi Zhou Fei Shen Manni Li Liang Zhang Weichang Guo Yifei Chen Le Shi Xiaogang Han | 2023 | Journal of Energy Chemistry2023，，4： | 0 |
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