Nano-sized cathode material LiMn0.5Fe0.5PO4/C synthesized via improved sol-gel routine and its magnetic and electrochemical properties

被引：37

作者：

Liu, Liying ^{[1
,2
]}

Chen, Guiyuan ^{[1
]}

Du, Bingtian ^{[1
]}

Cui, Yanyan ^{[1
]}

Ke, Xi ^{[1
]}

Liu, Jun ^{[1
]}

Guo, Zaiping ^{[1
,2
]}

Shi, Zhicong ^{[1
]}

Zhang, Haiyan ^{[1
]}

Chou, Shulei ^{[2
]}

机构：

[1] Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510006, Guangdong, Peoples R China

[2] Univ Wollongong, Inst Superconducting & Elect Mat, Australian Inst Innovat Mat, Wollongong, NSW 2522, Australia

来源：

ELECTROCHIMICA ACTA | 2017年 / 255卷

基金：

中国国家自然科学基金;

关键词：

lithium ion battery; cathode material; lithium manganese phosphate; lithium iron phosphate; magnetic property; LITHIUM ION BATTERIES; DOPED LIMNPO4/C; SOLVOTHERMAL SYNTHESIS; PERFORMANCE; COMPOSITES;

D O I：

10.1016/j.electacta.2017.09.165

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Cathode materials LiMn0.5Fe0.5PO4/C and LiMnPO4/C were synthesized by a high-energy ball-milling assisted sol-gel method. The LiMn0.5Fe0.5PO4 consists of nanorods and nanoparticles homogeneously wrapped with highly ordering carbon. The increased Neel-temperature and decreased effective magnetic moment of LiMn0.5Fe0.5PO4/C revealed the microstructure differences from LiMnPO4/C. Meanwhile, tiny amount of ferromagnetic impurities is detected in LiMn0.5Fe0.5PO4/C by magnetic tests. The synergetic effects of Fe substitution and carbon coating remarkably improve rate capacity and cyclic stability of LiMn0.5Fe0.5PO4/C. This solid solution delivers initial discharge capacities of 128.6 mAh g(-1) and 116.3 mAh g(-1) and capacity retentions of 93.5% and 90.3% after 100 cycles at 1C and 2C respectively, significantly better than LiMnPO4/C. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：205 / 211

页数：7

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