制备了颗粒尺寸不同的锂离子电池CoSb3电极材料,研究了颗粒尺寸对电极电化学性能的影响.结果表明,CoSb3的首次可逆容量从粗颗粒(约6 μm)的385 mAhg-1提高到球磨粉(约100 nm)的586 mAhg-1.微米尺寸CoSb3的首次不可逆容量主要是嵌锂时颗粒破碎失效引起的,而球磨纳米粉末的不可逆容量来源于锂的氧化反应和形成表面含锂化合物.球磨CoSb3的循环寿命低于期望值,但50次循环后的体积可逆容量仍比石墨负极材料高很多.
参考文献
| [1] | H.Sakaguchi, H.Honda and T.Esaka, J.Power Sources, 81～82, 229 (1999) |
| [2] | H.Kim, J.Choi, H.-J.Sohn and T.Kang, J.Electrochem. Soc., 146, 4401 (1999) |
| [3] | O.Mao, R.A.Dunlap, I.A.Courtney and J.Dahn, J. Electrochem. Soc., 145, 4195 (1998) |
| [4] | J.Yang, Y.Takeda, Q.Li, N.Imanishi and O.Yamamoto, J. Power Sources, 90, 64 (2000) |
| [5] | R.Alcántara, F.J.Fernándezmadrigal, P.Lavela, J.L.Tirado, J.C.Jumas and J.Olivierfourcade, J. Mater.Chem., 9, 2517 (1999) |
| [6] | R.Fong, U.von Sacken and J.R.Dahn, J. Electrochem. Soc., 137, 2009 (1990) |
| [7] | N.Takami, A.Satoh, M.Hara and T.Ohsaki, J. Electrochem. Soc., 142, 371 (1995) |
| [8] | K.Tatumi, N.Iwashita, H.Sakaebe, H.Shioyama and S. Higuchi, J. Electrochem. Soc., 142, 716 (1995) |
| [9] | W.Xing, J.R.Dahn, J. Electrochem. Soc., 144, 1195 (1997) |
| [10] | Kenji Sato, Minoru Noguchi, Atsushi Demachi, Naohiko Oki and Morinobu Endo, Science, 264, 556 (1994) |
| [11] | ZHANG Lijuan(张丽娟),ZHAO Xinbing(赵新兵),JIANG Xiaobing(蒋小兵),LU Chunping(吕春萍),Rare Metal Materials and Engineering(稀有金属材料与工程),30,268(2001) |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%