Preparation and Enhanced Rate Capability of Spinel LiMn_1.9Al_0.1O_3.95F_0.05

Authors

Jun-yan HU, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;
Meng-meng WANG, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;
Hong-tao LIU, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;Follow

Corresponding Author

Hong-tao LIU(liuht@csu.edu.cn)

Abstract

Spinel LiMn_1.9Al_0.1O_3.95F_0.05 cathode materials with good crystallinity were synthesized by a sol-gel process followed with a high-temperature solid reaction. The effects of partial substitution of Al for Mn, and F for O on the structure and the electrochemical performance were investigated. The results showed that LiMn_1.9Al_0.1O_3.95F_0.05 exhibited the same crystalline state as LiMn₂O₄, but much better electrochemical stability at higher rate cycling. As a result, LiMn_1.9Al_0.1O_3.95F_0.05 could maintain stable electrochemical lithium storage even suffering from different rate currents that retains over 90% of the initial capacity after 150 cycles at continuously varying currents (i.e. 0.1C, 0.5C, and 1C).

Graphical Abstract

Keywords

spinel lithium manganese oxide, lithium-ion battery, sol-gel method, rate capability, capacity retention

DOI Link

https://doi.org/10.13208/j.electrochem.150113

Publication Date

2015-08-28

Online Available Date

2015-08-28

Revised Date

2015-03-23

Received Date

2015-01-13

Recommended Citation

Jun-yan HU, Meng-meng WANG, Hong-tao LIU. Preparation and Enhanced Rate Capability of Spinel LiMn_1.9Al_0.1O_3.95F_0.05[J]. Journal of Electrochemistry, 2015 , 21(4): 382-386.
DOI: 10.13208/j.electrochem.150113
Available at: https://jelectrochem.xmu.edu.cn/journal/vol21/iss4/12