Evaluation of nano-crystal sized α-nickel hydroxide as an electrode material for alkaline rechargeable cells

被引:98
作者
Hu, Wei-Kang
Gao, Xue-Ping
Noreus, Dag
Burchardt, Trygve
Nakstad, Nils K.
机构
[1] Revolt Technol AS, N-7014 Trondheim, Norway
[2] Nankai Univ, Inst New Energy Mat Chem, Tianjin 300071, Peoples R China
[3] Univ Stockholm, Dept Struct Chem, Arrhenius Lab, S-10691 Stockholm, Sweden
关键词
nickel hydroxide; nanometer sized material; rechargeable battery; nickel electrode;
D O I
10.1016/j.jpowsour.2006.01.048
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
A new synthetic route including a hydrothermal treatment to produce AI-stabilized a-phase nickel hydroxide with an extremely fine grain size but with good crystallinity has been evaluated. The particle size and morphology were characterized by transmission electron microscopy (TEM). The results showed that a-phase nickel hydroxide with nano-sized, well-crystallized particles exhibits not only a high electrochemical capacity of up to 380-400 mAh g(-1), but also an excellent rate-capacity performance and long time stability during electrochemical cycling with up to 100% overcharge as well as under a long-term float charge. In contrast, the beta-phase nickel hydroxide showed a lower specific capacity and poorer cycling stability under similar overcharge cycling. Except for a lower volumetric energy density than the beta-phase, other properties make the Al-stabilized a-phase nickel hydroxide a superior battery material. There is still, however, room to increase the volumetric energy density of the a-phase beyond what is possible to reach by the beta-phase via further improvement of the tap density and the specific capacity of the alpha-phase. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:704 / 710
页数:7
相关论文
共 53 条