NDLI: 3D-assembled graphene–LiFePO$_{4}$ frameworks with enhanced electrochemical performance

Content Provider	Springer Nature Link
Author	Ma, Yuan Li, Xianlei Xie, Zheng Xiu, Zhiliang Wu, Yongzhong Hao, Xiaopeng
Copyright Year	2014
Abstract	In the on-going development of power sources and energy-storage devices, achieving both high power and large energy capacity with a high discharge rate is still a great challenge. In this paper, three dimension assembled graphene–LiFePO$_{4}$ (G–LFP) composites were prepared by one-step hydrothermal method. LiFePO$_{4}$ (LFP) particles became smaller and were dispersed uniformly on the graphene sheets after compositing with graphene. Compared to the pristine LFP, the electrochemical properties of the G–LFP are greatly improved, especially the rate capability and the cyclic performance. At 10 C, the G–LFP holds nearly 80 % of the initial capacity and has a flat voltage platform, while for the LFP, its capacity drops down to 65 % and its voltage platform is not noticeable. After 600 cycles at 10 C, the specific capacity of the G–LFP decreases from 135 to 125 mA hg$^{−1}$ with a capacity loss of 5.1 %, while it drops from 105 to 86 mA hg$^{−1}$ with a capacity loss of 30 % for the LFP. The reason for the improvement of the electrochemical performances could be ascribed to the introduction of graphene which enhances the conductivity and diminishes the LFP size which improves the diffusion of lithium ions.
Starting Page	2716
Ending Page	2723
Page Count	8
File Format	PDF
ISSN	09574522
Journal	Journal of Materials Science: Materials in Electronics
Volume Number	25
Issue Number	6
e-ISSN	1573482X
Language	English
Publisher	Springer US
Publisher Date	2014-04-20
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optical and Electronic Materials Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Biomaterials Biophysics Condensed Matter Physics Electronic, Optical and Magnetic Materials Bioengineering Electrical and Electronic Engineering Biomedical Engineering

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