Publication Date:
2018-02-03
Description:
The cotton-like Co(OH) 2 (S-Co(OH) 2 ) was successfully synthesized and its electrochemical performance was systematically investigated. S-Co(OH) 2 was prepared through the “destruction” of the newly formed colloid Co(OH) 2 by the reduction using sodium borohydride. The crystal structure and surface morphology were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). Used as an anode material for alkaline secondary batteries, S-Co(OH) 2 sample exhibited better cycle stability, higher electrochemical capacity, and higher rate performance than those of conventional β-Co(OH) 2 . At a discharge current density of 100 mA/g, the initial discharge capacity of S-Co(OH) 2 is 549.3 mAh/g and the discharge capacity is still sustained to be 329.2 mAh/g after 100 charge-discharge cycles with a capacity retention of 59.9%.
Print ISSN:
1757-8981
Electronic ISSN:
1757-899X
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
