Advantages of blending LiNi0.8Co0.2O2 into Li1+xMn2-xO4 cathodes

被引:82
作者
Numata, T
Amemiya, C
Kumeuchi, T
Shirakata, M
Yonezawa, M
机构
[1] NEC Corp Ltd, Funct Devices & Mat Res, Miyamae Ku, Kawasaki, Kanagawa 2168555, Japan
[2] NEC Corp Ltd, NEC Electron Devices, Elect Component Operat Unit, Miyamae Ku, Kawasaki, Kanagawa 2168555, Japan
关键词
manganese spinel; LiNi0.8Co0.2O2; Mn dissolution; blended cathode; storage; recovery capacity;
D O I
10.1016/S0378-7753(01)00753-4
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
LiNi0.8Co0.2O2 blending was investigated as a way to overcome the problems associated with lithium ion rechargeable batteries that use manganese: spinel as a cathode material. LiNi0.8Co0.2O2 is a useful additive for preventing HF-generation and Li-loss in electrolytes during storage at elevated temperatures. In experiments, the Mn dissolution from the spinel structure into the electrolyte was decreased by adding LiNi0.8Co0.2O2 This dissolution was almost completely eliminated by 15 wt.% LiNi0.8Co0.2O2 blending. As a result, this blending technique can prevent the decline in capacity caused by storage at elevated temperatures. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:358 / 360
页数:3
相关论文
共 12 条
  • [1] Bylr A., 1998, J ELECTROCHEM SOC, V145, P194
  • [2] Mechanism for limited 55°C storage performance of Li1.05Mn1.95O4 electrodes
    Du Pasquier, A
    Blyr, A
    Courjal, P
    Larcher, D
    Amatucci, G
    Gérand, B
    Tarascon, JM
    [J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1999, 146 (02) : 428 - 436
  • [3] KUMEUCHI T, 2001, ITE BATTERY LETT, V2, P41
  • [4] Numata T, 2000, NEC RES DEV, V41, P8
  • [5] Numata T, 1997, NEC RES DEV, V38, P294
  • [6] NUMATA T, 1996, P 190 M EL SOC, P1014
  • [7] OHTA T, 1999, P 196 ECS FALL M ABS, V99
  • [8] REIMERS JN, 1999, P 196 ECS FALL M ABS, V99
  • [9] Verwey-type transition and magnetic properties of the LiMn2O4 spinels
    Shimakawa, Y
    Numata, T
    Tabuchi, J
    [J]. JOURNAL OF SOLID STATE CHEMISTRY, 1997, 131 (01) : 138 - 143
  • [10] Stability of lithium ion spinel cells III. Improved life of charged cells
    Wang, E
    Ofer, D
    Bowden, W
    Iltchev, N
    Moses, R
    Brandt, K
    [J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2000, 147 (11) : 4023 - 4028