Citation: YUN Qiang, ZHOU Yuan, HAI Chun-Xi, SHEN Yue, LI Xiang, ZHANG Li-Juan, LI Song, DING Xiu-Ping. Hydrothermal Synthesis of Leaf-like LiFePO₄/C Cathode Composites[J]. Chinese Journal of Inorganic Chemistry, ;2015, (5): 880-887. doi: 10.11862/CJIC.2015.128 shu

Hydrothermal Synthesis of Leaf-like LiFePO₄/C Cathode Composites

YUN Qiang ^1,2 ,
ZHOU Yuan ^1,, ,
HAI Chun-Xi ¹ ,
SHEN Yue ¹ ,
LI Xiang ^1,2 ,
ZHANG Li-Juan ^1,2 ,
LI Song ^1,2 ,
DING Xiu-Ping ¹

1.
1 Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China;
2.
2 University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: ZHOU Yuan,
Received Date: 27 January 2015
Available Online: 25 February 2015
Fund Project: 国家高技术研究发展计划(863)(No.2013AA110100) (863)(No.2013AA110100)国家重点基础研究发展计划(973)(No.2014CB660806) (973)(No.2014CB660806)中国科学院“西部之光”人才培养计划(No.Y412041007) (No.Y412041007)2014年西宁市科技项目(No.2014-6-24)资助。 (No.2014-6-24)

Highly-dispersed LiFePO₄/C composite with micro-leaf structure was synthesized by a facile citric acid-assisted hydrothermal method in this study. Crystal structure and morphology of samples were investigated by XRD, FTIR, SEM, HR-TEM and selected area electron diffraction (SAED). The characterization results indicate that citric acid accelerates the formation of leaf-like LiFePO₄/C composite. The as-prepared leaf-like LiFePO₄/C composite with an enlarged (010) plane has high dispersibility. By comparing the electrochemical properties of the LiFePO₄/C particles in our study, the LiFePO₄/C micro-leaves exhibit larger discharge capacity and better rate performance, which deliver a discharge capacity of 158 mAh·g^-1 at 0.1C and 126 mAh·g^-1 at 5C. The enhanced performance perhaps is attributed to the reduced Li-ion diffusion paths along the [010] direction and larger Li-ion diffusion coefficient.
- materials science;hydrothermal synthesis;electrochemistry;LiFePO₄/C;micro-leaf;citric acid
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Hydrothermal Synthesis of Leaf-like LiFePO4/C Cathode Composites

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Hydrothermal Synthesis of Leaf-like LiFePO₄/C Cathode Composites