乙二醇辅助固相法合成LiFePO4
Ethylene Glycol-Assisted Synthesis of LiFePO 4by Traditional Solid-State Method
DOI:10.12677/MS.2013.35041,PDF,HTML,XML,下载: 3,608浏览: 14,996科研立项经费支持
作者:李艳,刘英才*,王洁：中国海洋大学材料科学与工程研究院，青岛
关键词:锂离子电池；LiFePO4；正极材料；固相合成法；乙二醇；Lithium-Ion Battery; Lithium Iron Phosphate; Cathode Material; Solid-State Method; Ethylene Glycol
摘要: 本文以 Li 2 CO 3 ， FeC 2 O 4 ·2H 2 O 和 NH 4 H 2 PO 4 为原料，采用传统的固相法合成锂离子电池正极材料 LiFePO 4 /C ，为了提高电化学性能，加入乙二醇进行表面改性。利用 X 射线衍射仪 (XRD) ，扫描电子显微镜 (SEM) 对材料晶体结构、表观形貌和化学成分进行表征，采用恒电流充放电测试技术对其电化学性能进行测定，并且研究了乙二醇对 LiFePO 4 /C 晶体生长方向的影响。结果表明经乙二醇改性的 LiFePO 4 /C 颗粒呈板状堆积，在 0.1 C 、 0.5 C 、 1.0 C 的电流密度下充放电平台稳定，并且具有较好的循环效率。
Abstract: Lithium-ion battery cathode material LiFePO 4 /C was synthesized by Li 2 CO 3 , FeC 2 O 4 ·2H 2 O, NH 4 H 2 PO 4 ina traditional way, and ethylene glycol was used as surfactant for advancing electrochemical performance. The crystalline structure, morphology and chemical composition of LiFePO 4 /C particles were characterized by X-ray diffraction, scan- ning electron microscopy and electrochemical performance was characterized by constant - current charge-discharge test technique , respectively. In addition, the effec ts of ethylene glycol on the crystal growth direction were discussed in this paper. The results show that the grains of LiFePO 4 /C which are synthesized with ethylene glycol-assisted present plate- type accumulation. The charge-discharge potential flats present smooth in different current density (0.1C,0.5Cand1.0C) and the cycle ability is stable.
文章引用：李艳, 刘英才, 王洁. 乙二醇辅助固相法合成LiFePO 4[J]. 材料科学, 2013, 3(5): 230-235. http://dx.doi.org/10.12677/MS.2013.35041

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