Electrochemical Properties of Ce(OH)3 Coating Zn-Al-LDHs in Zn-Ni Secondary Battery
QU Yasong1, YU Xiaohua1, XIE Gang1,2,3, WU Zhanxin1, SHI Chunyang1, YANG Yagang1, LI Yonggang4
1 School of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China 2 Kunming Metallurgical Research Institute Co., Ltd., Kunming 650503, China 3 State Key Laboratory of Common Associated Non-ferrous Metal Resources Pressure Hydrometallurgy Technology, Kunming 650503, China 4 Yunnan Copper Science & Technology Development Co., Ltd., Kunming 650101, China
Abstract: Ce(OH)3 coating Zn-Al-LDHs were prepared by coprecipitation method and used as a new negative material for Zn-Ni secondary battery. The morphology and microstructure of Ce(OH)3 coating Zn-Al-LDHs were represented by XRD and SEM. The results showed that Ce(OH)3 was successfully coating on the surface of Zn-Al-LDHs. The electrochemical properties were studied by cyclic voltammetry (CV), Tafel polarization curve, electrochemical impedance spectroscope (EIS) and galvanostatic charge-discharge measurements as negative electrode materials for Zn-Ni battery. The results showed that Ce(OH)3 coating Zn-Al-LDHs exhibits good cyclic reversibility and corrosion resistance, and the cyclic stability and charge-discharge characteristics of Ce(OH)3 coating Zn-Al-LDHs are significantly improved in Zn-Ni secondary battery. After 80 cycles, the cycle retention rate can reach 94.5%.
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2021, Vol. 35 
