In:
ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2017-01, No. 1 ( 2017-04-15), p. 89-89
Abstract:
A great deal attention has recently been focused on the Li-rich solid-solution layered oxide cathode material Li 2 MnO 3 -Li M O 2 (LLO, M = Co, Ni, etc.), which exhibits a discharge capacity of more than 200 mAhg -1 when operated above 4.6 V for lithium ion battery. In this study, in order to find the optimal composition of the LLO exhibiting high cathode performance, which are composed of Li 2 MnO 3 , LiCo 1/3 Ni 1/3 Mn 1/3 O 2 (or LiCoO 2 , LiNiO 2 ) and LiNi 0.5 Mn 0.5 O 2 , the selected 120 samples having different composition were synthesized under identical preparation conditions and the dependence of the performance of the cathode material on the percentages of Li 2 MnO 3 , LiCo 1/3 Ni 1/3 Mn 1/3 O 2 (or LiCoO 2 , LiNiO 2 ) and LiNi 0.5 Mn 0.5 O 2 in the LLO samples was examined under same experimental conditions in the viewpoint of discharge capacity, retention of discharge capacity, average discharge voltage, energy density and rate capability. In each viewpoint, using ternary phase diagrams, the dependence of each property on the percentages of Li 2 MnO 3 , LiCo 1/3 Ni 1/3 Mn 1/3 O 2 and LiNi 0.5 Mn 0.5 O 2 in the LLO samples was evaluated. Based on the results obtained, it was comprehensively concluded that Li[Ni 0.208 Li 0.183 Co 0.033 Mn 0.575 ]O 2 (55% Li 2 MnO 3 -35% LiNi 1/2 Mn 1/2 O 2 -10% LiNi 1/3 Co 1/3 Mn 1/3 O 2 ) possesses the best composition as cathode material for LIBs among the testes 120 samples. In addition, the synthesis condition of Li[Ni 0.208 Li 0.183 Co 0.033 Mn 0.575 ]O 2 was examined more in the viewpoint of annealing temperature.
Type of Medium:
Online Resource
ISSN:
2151-2043
DOI:
10.1149/MA2017-01/1/89
Language:
Unknown
Publisher:
The Electrochemical Society
Publication Date:
2017
detail.hit.zdb_id:
2438749-6
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