Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 163, Issue 13, Pages A2665-A2672Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0841613jes
Keywords
-
Funding
- National Natural Science Foundation of China [21333002]
- State Key Basic Research Program of PRC [2011CB935903]
- Shanghai Science Technology Committee [13JC1407900]
Ask authors/readers for more resources
The layered Ni-rich oxide cathode (LiNi0.8Co0.1Mn0.1O2) has been significantly attractive due to its large reversible capacity (200 mAh g(-1)). However, the layered Ni-rich oxide cathode suffers from a tremendous structural degradation during long-term cycling, causing the drastic rise of electrode impedance and deterioration of the capacity retention. In this paper, we develop a novel and facile approach to stabilize its structure by per-cycling of the layered Ni-rich oxide cathode at high voltage of 4.5 V (vs Li/Li+). The nano-thickness cation-mixing layers with Fm-3m structure were in-situ formed on the layered Ni-rich oxide LiNi0.8Co0.1Mn0.1O2 cathode by the surface structural transition from rhombohedral phase to cubic phase. The as-prepared LiNi0.8Co0.1Mn0.1O2 cathode coated with the nano-thickness cation-mixing layers shows superior cycling life at a cutoff voltage of 4.3 V, and it keeps a capacity retention of 83% after 500 cycles, which could be attributed to that the nano-thickness cation-mixing layers stabilize the structure of LiNi0.8Co0.1Mn0.1O2 during long-term cycling. (C) 2016 The Electrochemical Society. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available