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Enhanced electrochemical performance from 3DG/LiFePO4/G sandwich cathode material
Du, Yahui1,2; Tang, Yufeng2; Chang, Chengkang1
2017
发表期刊Journal of Physics and Chemistry of Solids
ISSN00223697
卷号107页码:36-41
摘要In this paper, we have successfully synthesized a three dimensional graphene/LiFePO4/graphene (3DG/LFP/G) sandwich composite by an in-situ hydrothermal method, in which chemical vapor deposited 3D graphene acts as the high conductivity supporting framework, while the LiFePO4nanoparticles are anchored onto the 3D graphene framework covered by graphene sheets. XRD and SEM results confirmed the formation of the 3DG/LFP/G sandwich composite. Cyclic Voltammetry curve of the sandwich composite shows sharper redox peaks and reduced voltage separation when compared to the reference electrodes, suggesting high specific capacity and good rate performance. Further charge/discharge measurements presented high capacity of 164 mAh g−1at 0.2 C and 124 mAh g−1at 10 C (75.7% of its initial capacity) for the sandwich composite, with capacity retention of 95.7% after 100 cycles, implying potential application in lithium ion battery at high rates. The EIS investigation suggests that both the electronic conductivity and the Li ion diffusion are promoted by the underlined 3D graphene framework, which is regarded as the reason for the enhanced electrochemical performance. © 2017 Elsevier Ltd
DOI10.1016/j.jpcs.2017.03.016
EI入藏号20171403517755
EI主题词Lithium-ion batteries
EI分类号761 Nanotechnology - 801.4.1 Electrochemistry - 802.2 Chemical Reactions - 804 Chemical Products Generally
引用统计
文献类型期刊论文
条目标识符http://ir.sic.ac.cn/handle/331005/25767
专题中国科学院上海硅酸盐研究所
通讯作者Tang, Yufeng
作者单位1.School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai; 200235, China;
2.CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China
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GB/T 7714
Du, Yahui,Tang, Yufeng,Chang, Chengkang. Enhanced electrochemical performance from 3DG/LiFePO4/G sandwich cathode material[J]. Journal of Physics and Chemistry of Solids,2017,107:36-41.
APA Du, Yahui,Tang, Yufeng,&Chang, Chengkang.(2017).Enhanced electrochemical performance from 3DG/LiFePO4/G sandwich cathode material.Journal of Physics and Chemistry of Solids,107,36-41.
MLA Du, Yahui,et al."Enhanced electrochemical performance from 3DG/LiFePO4/G sandwich cathode material".Journal of Physics and Chemistry of Solids 107(2017):36-41.
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