期刊
JOURNAL OF POWER SOURCES
卷 238, 期 -, 页码 117-122出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2013.03.059
关键词
Cobalt-carbon composite; Electrochemical property; Negative material; Alkaline secondary battery
资金
- MOST Project [2010CB631303]
- NSFC [50971071, 51071087]
- 111 Project [B12015]
- Natural Science Foundation of Tianjin [11JCYBJC07700]
Co/CMK-3 composites are synthesized via a facile hydrothermal route. The electrochemical performances of Co/CMK-3 composite as the negative electrode material for alkaline rechargeable Ni/Co batteries have been systemically investigated. Electrochemical measurements show that the CMK-3 can remarkably enhance the electrochemical activity of Co, leading to a notable improvement of the discharge capacity, cycle stability and rate capability. Interestingly, the discharge capacity of Co/CMK-3 (25 mg CMK-3) electrode can reach 519.3 mAh g(-1) and retains about 365.8 mAh g(-1) after 100 cycles at discharge current of 100 mA g(-1). The electrochemical reaction mechanism of Co/CMK-3 composite electrode can be attributed to the electrochemical redox reaction between Co and Co(OH)(2). (C) 2013 Elsevier B.V. All rights reserved.
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