Fabrication of high tap density LiFe0.6Mn0.4PO4/C microspheres by a double carbon coating-spray drying method for high rate lithium ion batteries

被引：85

作者：

Liu, Wen ^{[1
]}

Gao, Ping ^{[1
]}

Mi, Yingying ^{[1
]}

Chen, Jitao ^{[1
]}

Zhou, Henghui ^{[1
]}

Zhang, Xinxiang ^{[1
]}

机构：

[1] Peking Univ, Coll Chem & Mol Engn, Beijing 100871, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2013年 / 1卷 / 07期

关键词：

CATHODE MATERIALS; PHOSPHO-OLIVINES; IRON PHOSPHATE; LIFEPO4; LIMNPO4; PERFORMANCE; MORPHOLOGY; CAPACITY; SIZE;

D O I：

10.1039/c2ta00939k

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：

Spherical LiFe0.6Mn0.4PO4/C particles with high tap density were successfully synthesized by sintering spherical precursor powders prepared by a modified spray drying method with a double carbon coating process. The obtained secondary spheres were made of carbon-coated nanocrystallines (similar to 100 nm), exhibiting a high tap density of 1.4 g cm(-3). The LiFe0.6Mn0.4PO4/C microspheres had a reversible capacity of 160.2 mAh g(-1) at 0.1C, and a volume energy density of 801.5 Wh L-1 which is nearly 1.4 times that of their nano-sized counterparts. This spherical material showed remarkable rate capability by maintaining 106.3 mAh g(-1) at 20C, as well as excellent cycleablity with 98.9% capacity retention after 100 cycles at 2C and 200 cycles at 5C. The excellent electrochemical performance and processability of the LiFe0.6Mn0.4PO4/C microspheres make them very attractive as cathode materials for use in high rate battery application.

引用

页码：2411 / 2417

页数：7

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