Improvement of Cathode Properties by Lithium Excess in Disordered Rocksalt Li2+2xMn1-xTi1-xO4

被引：32
|
作者：
Kitajou, Ayuko [1 ]
Tanaka, Kosuke [2 ]
Miki, Hidenori [3 ]
Koga, Hideyuki [3 ]
Okajima, Toshihiro [4 ]
Okada, Shigeto [1 ]
机构：
[1] Kyushu Univ, Inst Mat Chem & Engn, 6-1 Kasuga Koen, Kasuga, Fukuoka 8168580, Japan
[2] Kyushu Univ, Interdisciplinary Grad Sch Engn Sci, 6-1 Kasuga Koen, Kasuga, Fukuoka 8168580, Japan
[3] Toyota Motor Co Ltd, 1200 Misyuku, Susono 4101193, Japan
[4] Kyushu Synchrotron Light Res Ctr, 8-7 Yayoigaoka, Tosu, Saga 8410005, Japan
来源：
ELECTROCHEMISTRY | 2016年 / 84卷 / 08期
关键词：
Li-ion Batteries; Disordered Rocksalt-type Cathode; Lithium Excess Composition; In-situ XANES Measurement; LI-ION BATTERIES; LI2NITIO4; LI2MNTIO4; ELECTRODE; LINIO2; OXIDES;
D O I：
10.5796/electrochemistry.84.597
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Although Li2MnTiO4 has a large theoretical capacity (295 mAh g(-1)), the cathode utilization is limited due to the mixed cation occupation in the disordered rocksalt structure. In this study, we have attempted to prepare single-phase Li2+2xMn1-xTi1-xO4 compositions (0 <= x <= 0.3) with Li excess to further improve the cathode properties of Li2MnTiO4. The rechargeable capacity of the synthesized Li2.4Mn0.8Ti0.8O4 composition was above 220 mAh g(-1), which is larger than those of other disordered Li2MTiO4 (M = Ni, Co, Mn and Fe) series. Moreover, the discharge capacity of Li2.4Mn0.8Ti0.8O4 was ca. 190 mAh g(-1) after the 15th cycle, and its capacity retention was 82%. (C) The Electrochemical Society of Japan, All rights reserved.
引用
收藏
页码：597 / 600
页数：4
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