Co3O4 mesoporous nanostructures@graphene membrane as an integrated anode for long-life lithium-ion batteries
Co3O4 mesoporous nanostructures@graphene membrane as an integrated anode for long-life lithium-ion batteries
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Co3O4介孔纳米结构@石墨烯膜作为长寿命锂离子电池的集成阳极
DOI：
10.1016/j.jpowsour.2013.12.129
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发表时间：
2014-06-01
影响因子：
9.2
通讯作者：
Cheng, Hui-Ming
中科院分区：
文献类型：
--
作者：
Li, Lu;Zhou, Guangmin;Cheng, Hui-Ming
锂离子电池最吸引人的研究领域之一是设计精细的纳米电极结构，这被认为是解决锂离子和电子传输速度慢、循环过程中电极材料体积变化大等问题的关键。本文采用水热法在石墨烯薄膜上直接生长出结构可控的介孔CO3O4，并将其用作LiBS的集成阳极，而不需要使用金属集电器、粘结剂和导电添加剂。轻质石墨烯薄膜作为集电体具有较高的导电性和稳定性，使得LiBS具有较高的能量密度。具有足够空间的介孔结构有利于锂离子的扩散和CO_3O_4在放电/充电过程中的应变缓冲，使电极具有高性能。在500 mAg(-1)的大电流密度下，集成电极表现出良好的倍率性能和良好的循环稳定性，在500次循环中没有容量损失。(C)2014爱思唯尔B.V.保留所有权利。
One of the most attractive research areas in lithium-ion batteries (LIBs) is to design elaborate nano-structure of the electrode, which has been considered as keys to solve the problems such as the low energy density, slow lithium ion and electron transport, and the large volume change of electrode materials during cycling processes. Here, mesoporous CO3O4 with controllable structures was directly grown on a graphene membrane by hydrothermal reaction followed by annealing treatment, and used as an integrated anode in LIBs without using metallic current collector, binder and conductive additive. The light graphene membrane as current collector with high electrical conductivity and stability contributes to the high energy density of LIBs. A mesoporous structure with enough space is beneficial to lithium ion diffusion and strain buffer of CO3O4 during discharge/charge processes, rendering the electrodes high performance. The integrated electrode shows good rate capability and impressive cycling stability without capacity loss over 500 cycles under a high current density of 500 mA g(-1). (C) 2014 Elsevier B.V. All rights reserved.