Electrochemically produced battery-type Ni(OH) 2 /Ni 3 Si electrodes

Micro & nano letters

article

Kai Cui¹  Zhilong Zhao¹  Wenbin Liu¹ 

[1] School of Mechanical Engineering, Northwestern Polytechnical University

关键词: electrodeposition;    voltammetry (chemical analysis);    electrochemistry;    nickel;    electrochemical electrodes;    nickel alloys;    nickel compounds;    lithium compounds;    discharges (electric);    secondary cells;    current 10.0 mA;    current 1.0 mA;    current 20.0 mA;    cycle stability;    electrodes;    cyclic stability;    areal capacity;    discharge current;    galvanostatic charge–discharge results;    cyclic voltammetry;    direct current electrodeposition;    battery-type electrode material;   

DOI  :  10.1049/mnl.2020.0316

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

The fabrication, by an electrochemical process, of a new battery-type electrode material, is presented. Such materials are fabricated by direct current electrodeposition of Ni(OH) 2 on lamellar Ni 3 Si. Microstructure and morphology of Ni(OH) 2 /Ni 3 Si electrodes were characterised. Cyclic voltammetry and galvanostatic charge–discharge results revealed that they are battery-type electrodes. Increasing deposition time or decreasing discharge current can significantly increase the areal capacity. The areal capacity of Ni(OH) 2 /Ni 3 Si-20 with a discharge current of 20 mA is only 2.8% of that with 1 mA. However, the increasing deposition time will reduce the cyclic stability of the electrodes. The initial areal capacity of Ni(OH) 2 /Ni 3 Si-20 is twice that of Ni(OH) 2 /Ni 3 Si-10 with a discharge current of 10 mA, but after 1000 cycles, it can only maintain 59.3% of the initial value. This Letter is expected to provide a powerful reference and guidance for the preparation of electrodes with large areal capacity and cycle stability.

【 授权许可】

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