共 23 条
Synthesis and electrochemical properties of olivine LiFePO4 prepared by a carbothermal reduction method
被引:93
作者:

Liu, Hui-ping
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Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Peoples R China Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Peoples R China

Wang, Zhi-xing
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Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Peoples R China Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Peoples R China

Li, Xin-hai
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Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Peoples R China Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Peoples R China

Guo, Hua-jun
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Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Peoples R China Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Peoples R China

Peng, Wen-jie
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Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Peoples R China Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Peoples R China

Zhang, Yun-he
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Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Peoples R China Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Peoples R China

Hu, Qi-yang
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Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Peoples R China Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Peoples R China
机构:
[1] Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Peoples R China
关键词:
Lithium ion battery;
Lithium iron phosphate;
Fe2O3;
Carbothermal reduction;
D O I:
10.1016/j.jpowsour.2008.02.084
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
LiFePO4/C composite cathode material was prepared by carbothermal reduction method, which uses NH4H2PO4, Li2CO3 and cheap Fe2O3 as starting materials, acetylene black and glucose as carbon sources. The precursor of LiFePO4/C was characterized by differential thermal analysis and thermogravimetry. X-ray diffraction (XRD), scanning electron microscopy (SEM) micrographs showed that the LiFePO4/C is olivine-type phase, and the addition of the carbon reduced the LiFePO4 grain size. The carbon is dispersed between the grains, ensuring a good electronic contact. The products sintered at 700 degrees C for 8 h with glucose as carbon source possessed excellent electrochemical performance. The synthesized LiFePO4 composites showed a high electrochemical capacity of 159.3 rnAh g(-1) at 0.1 C rate, and the capacity fading is only 2.2% after 30 cycles. (c) 2008 Elsevier B.V. All rights reserved.
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页码:469 / 472
页数:4
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