The Effect of K-Ion on the Electrochemical Performance of Spinel LiMn2O4
- Resource Type
- Article
- Authors
- Lilong Xiong; Youlong Xu; Xiang Xiao; Jie Wang; Yutao Li
- Source
- Electronic Materials Letters, 11(1), pp.138-142 Jan, 2015
- Subject
- 전자/정보통신공학
- Language
- English
- ISSN
- 2093-6788
1738-8090
Spinel LiMn2O4 is regarded as one of the cathode active materials for rechargeablelithium-ion batteries with the most potential. K+-ion modified LiMn2O4 samples aresynthesized by solid-state reaction. The SEM analysis shows that the modifiedsamples exhibit uniform particle size distribution and much better crystallinity. Themodified sample K1 exhibits ionic diffusion coefficient of 1.43 × 10−10 cm−2 s−1 and2.04 × 10−10 cm−2 s−1, which is much higher than that of the un-modified spinelLiMn2O4 sample. The electrochemical measurements show that K+-ion modificationcould effectively reduce the charge transfer resistance, improve the capacityretention and rate capacity of the spinel materials.