Enhanced Electrochemical Performance of Li1.2Mn0.54Ni0.13Co0.13O2 via L-Ascorbic Acid-Based Treatment as Cathode Material for Li-Ion Batteries. Issue 9 (23rd June 2018)

• Record Type: Journal Article
• Authors: Pang, Shengli; Zhu, Meng; Xu, Kaijie; Shen, Xiangqian; Wen, Haoran; Su, Yanjing; Yang, Gongmei; Wu, Xiao; Li, Songwei; Wang, Wenzhi; Xi, Xiaoming; Wang, Haibin
• Is Part Of: Journal of the Electrochemical Society. Volume 165:Issue 9(2018)
• Page Start: A1897
• Page End: A1902
• Publication Date: 2018-06-23
• Subjects: cathode material -- Li-ion battery -- Li-rich layered oxide; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.1481809jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Low rate performance and poor cyclic performance are vital factors undermining the practical application of Li-rich layered oxides as the cathode material for advanced Li-ion batteries. Herein, we demonstrate a significant enhancement in rate capability and cyclic performance of Li1.2 Mn0.54 Ni0.13 Co0.13 O2 via an L-ascorbic acid-based treatment. The discharge capacity ratio at different current rates (0.5C/0.05C) increases from 70.4% to 79.9% after L-ascorbic acid-based modification. Furthermore, the remaning energy for the modified sample after the 100 th cycle is 628.6 Wh Kg −1, which is 35.6% higher than the energy density of pristine sample (463.5 Wh Kg −1 ). The enhancement in electrochemical performance of the L-ascorbic acid treated Li1.2 Mn0.54 Ni0.13 Co0.13 O2 is attributed to the co-contribution of chemical activation of Li2 MnO3 phase, exposure of high proportion of Li-conducting-favorable faces at the particle surface, increase in specific surface area and in-situ formation of minor spinel phase under the surface.