Effect and function mechanism of amorphous sulfur on the electrochemical properties of cobalt hydroxide electrode
Effect and function mechanism of amorphous sulfur on the electrochemical properties of cobalt hydroxide electrode
复制标题
无定形硫对氢氧化钴电极电化学性能的影响及作用机理
DOI：
10.1016/j.jpowsour.2010.04.088
复制
发表时间：
2010-10
影响因子：
9.2
通讯作者：
Yuan, Huatang
中科院分区：
文献类型：
--
作者：
Wang, Yijing;Wang, Yaping;Wang, Qinghong;Song, Dawei;Jiao, Lifang;Yuan, Huatang
采用共沉淀法制备了S-Co（OH）2复合材料，并将其作为Ni/Co电池负极材料进行了研究。非晶态S的加入改善了Co（OH）2电极的电化学性能。S-Co（OH）2电极的放电容量可达413.2mAhg-1，300次循环后仍保持在340 mAhg-1左右，远高于不含S的Co（OH）2电极。S-Co（OH）2电极中的非晶态S在充放电过程中表现出两种功能。一是高比表面积的非晶态S的加入改善了Co（OH）2片晶的分散性。二是非晶态S在电极中的溶解使Co（OH）_2片晶间产生了新的空隙，这两个因素使Co（OH）_2片晶间的空隙大大增加。空隙越多，与碱性溶液的接触面积越大，有利于表面电化学氧化还原。因此，提高了Co（OH）2的容量利用率。
S-Co(OH)2composite is prepared via a facile co-precipitation method and investigated as negative electrode of Ni/Co battery. The addition of amorphous S improves the electrochemical properties of Co(OH)2electrode. The discharge capacity of S-Co(OH)2electrode can reach 413.2mAhg−1and still keep about 340mAhg−1after 300 cycles, which is much higher than that of S-free Co(OH)2electrode. Amorphous S in S-Co(OH)2electrode shows two functions during the charge–discharge process. One is that the addition of amorphous S with high specific surface area improves the dispersion of Co(OH)2platelets. The other is that the dissolution of amorphous S in electrode brings the new interspaces among the Co(OH)2platelets, these two factors largely increase the interspaces among Co(OH)2platelets. More interspaces are correlated to larger contact area with alkaline solution, which is in favor of the surface electrochemical redox. Thus, the capacity utilization of Co(OH)2is enhanced.
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影响因子：
56.9
作者：
S. Ovshinsky;M. Fetcenko;J. Ross
通讯作者：
S. Ovshinsky;M. Fetcenko;J. Ross
影响因子：
6.6
作者：
Anbao Yuan;Jun Zhao
通讯作者：
Anbao Yuan;Jun Zhao
影响因子：
15
作者：
Liu, ZP;Ma, RZ;Sasaki, T
通讯作者：
Sasaki, T
影响因子：
9.2
作者：
A. Durairajan;B. Haran;B. Popov;R. White
通讯作者：
A. Durairajan;B. Haran;B. Popov;R. White
影响因子：
6.6
作者：
Z. Lu;S. Yao;G. R. Li;T. Y. Yan;X. P. Gao
通讯作者：
Z. Lu;S. Yao;G. R. Li;T. Y. Yan;X. P. Gao