Structure change during charging processes of LiMyNi1-yO2 (M = Ca, In, Nb) as the cathode active material for lithium secondary batteries

被引：15

作者：

Sato, Y ^{[1
]}

Koyano, T ^{[1
]}

Mukai, M ^{[1
]}

Kobayakawa, K ^{[1
]}

机构：

[1] Kanagawa Univ, Fac Engn, Dept Appl Chem, Kanagawa Ku, Yokohama, Kanagawa 2218686, Japan

来源：

DENKI KAGAKU | 1998年 / 66卷 / 12期

关键词：

lithium nickelate; additives; structure change; cycleability;

D O I：

10.5796/kogyobutsurikagaku.66.1215

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In order to improve the cycleability of LiNiO2 as the cathode active material for lithium secondary batteries, impurity-containing LiNiO(2)s (LiMyNi1-yO2, M = Ca, In, Nb) were prepared. By changing the content of y, the largest capacity was obtained at y = 0.005. The charge-discharge cycleability of Ca- or Nb-containing LiNiO2 was improved by about 8-10% for 40 cycles. By measuring the diffusion coefficient of Li+ in the cathode and the in situ XRD change in the charging process, it was found that the structure change of the cathode during the charging process was suppressed by exchanging a part of Ni with Ca or Nb.

引用

页码：1215 / 1222

页数：8

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