Investigation of novel cobalt–boron–carbon system as negative material for secondary alkaline battery
Investigation of novel cobalt–boron–carbon system as negative material for secondary alkaline battery
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DOI：
10.1016/j.electacta.2011.09.071
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发表时间：
2011-12
影响因子：
6.6
通讯作者：
Qinghong Wang;Lifang Jiao;Hongmei Du;Qingna Huan;Wenxiu Peng;Dawei Song;Yijing Wang;H. Yuan
中科院分区：
文献类型：
--
作者：
Qinghong Wang;Lifang Jiao;Hongmei Du;Qingna Huan;Wenxiu Peng;Dawei Song;Yijing Wang;H. Yuan
A series of novel cobalt–boron–carbon systems have been successfully synthesized by a chemical reduction method with subsequent heat-treatment in the presence of various contents of glucose. The products thus obtained have been investigated as negative electrode materials in KOH aqueous solution. The as-prepared samples are characterized by XRD, ICP, TEM and BET method. It is found that the samples are composed of Co–B particles coated by carbon nanoflakes, which significantly improve their BET surface areas. Electrochemical measurements showed that the Co–B–C electrodes display high discharge capacity, excellent cycle stability and outstanding rate capability. The discharge capacity of the Co–B–C electrode reaches 430.1mAhg−1at the current density of 500mAg−1and it still remains 401.6mAhg−1after 100 cycles, which is attractive compared with other Co-based materials reported before. CV and XRD measurements reveal that the reversible faradic reaction between highly dispersed Co and Co(OH)2is dominant for the Co–B–C composites.
