TY - JOUR
T1 - Electrochemical properties of Co(OH)2 powders as an anode in an alkaline battery
AU - Yao, Yan
AU - Zhao, Xiangyu
AU - Ma, Liqun
AU - Qin, Tienan
AU - Yang, Meng
AU - Ding, Yi
PY - 2010/7
Y1 - 2010/7
N2 - The structure and electrochemical properties of β-Co(OH)2 powders, synthesized by a chemical precipitation method, were investigated. The results of X-ray diffraction show that a reversible reaction between β-Co(OH)2 and hcp Co occurs. The cycling induces a capacity loss of β-Co(OH)2 electrode, which is probably attributed to the dissolution of β-Co(OH)2 and the subsequent formation of α-Co(OH)2 and CoOOH. The results of electrochemical impedance spectra indicate that the electrochemical discharge process of the as-prepared Co(OH)2 powders consists of three steps, namely the charge-transfer reactions of Co/CoH x and Co/Co(OH)2, and the hydrogen diffusion within Co, depending on the depth of discharge.
AB - The structure and electrochemical properties of β-Co(OH)2 powders, synthesized by a chemical precipitation method, were investigated. The results of X-ray diffraction show that a reversible reaction between β-Co(OH)2 and hcp Co occurs. The cycling induces a capacity loss of β-Co(OH)2 electrode, which is probably attributed to the dissolution of β-Co(OH)2 and the subsequent formation of α-Co(OH)2 and CoOOH. The results of electrochemical impedance spectra indicate that the electrochemical discharge process of the as-prepared Co(OH)2 powders consists of three steps, namely the charge-transfer reactions of Co/CoH x and Co/Co(OH)2, and the hydrogen diffusion within Co, depending on the depth of discharge.
UR - http://www.scopus.com/inward/record.url?scp=77953285257&partnerID=8YFLogxK
U2 - 10.1007/s10853-010-4424-5
DO - 10.1007/s10853-010-4424-5
M3 - 文章
AN - SCOPUS:77953285257
SN - 0022-2461
VL - 45
SP - 3752
EP - 3756
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 14
ER -