Cobalt（Ⅱ） coordination polymers as anodes for lithium-ion batteries with enhanced capacity and cycling stability
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2018年第8期
论文作者：Yumei Luo Lixian Sun Fen Xu Siyue Wei Qingyong Wang Hongliang Peng Chonglin Chen
文章页码：1412 - 1418
摘 要：Coordination polymer Co-btca（H4 btca = 1,2,4,5-benzenetetracarboxylic acid） was synthesized using a simply hydrothermal method.In particular,the as-prepared Co-btca was applied as an anode material for lithium-ion battery for the first time.Single crystal X-ray diffraction results indicated that the asprepared Co-btca displayed unique layer structure,which was beneficial to transport Li ions and electrons.Also,owing to the porous structure and appropriate specific surface area,Co-btca electrode delivered a reversible capacity of 801.3 m A h/g after 50 cycles at a current density of 200 m A/g.The reversible capacity of 773.9 m A h/g was maintained after 200 cycles at a current density of 500 m A/g,exhibiting enhanced cycle stability.It also showed improved rate performance,making it a promising anode material and a new choice for lithium-ion batteries.
Yumei Luo1，Lixian Sun1，Fen Xu1，Siyue Wei1，Qingyong Wang1，Hongliang Peng1，Chonglin Chen2
1. Guangxi Key Laboratory of Information Materials,Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials,School of Material Science and Engineering,Guilin University of Electronic Technology2. Department of Physics and Astronomy,Texas University at San Antonio
摘 要：Coordination polymer Co-btca（H4 btca = 1,2,4,5-benzenetetracarboxylic acid） was synthesized using a simply hydrothermal method.In particular,the as-prepared Co-btca was applied as an anode material for lithium-ion battery for the first time.Single crystal X-ray diffraction results indicated that the asprepared Co-btca displayed unique layer structure,which was beneficial to transport Li ions and electrons.Also,owing to the porous structure and appropriate specific surface area,Co-btca electrode delivered a reversible capacity of 801.3 m A h/g after 50 cycles at a current density of 200 m A/g.The reversible capacity of 773.9 m A h/g was maintained after 200 cycles at a current density of 500 m A/g,exhibiting enhanced cycle stability.It also showed improved rate performance,making it a promising anode material and a new choice for lithium-ion batteries.
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