Open AccessElectrochemically produced battery‐type Ni(OH) 2 /Ni 3 Si electrodes
Author(s) -
Cui Kai,
Zhao Zhilong,
Liu Wenbin
Publication year - 2020
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2020.0316
Subject(s) - electrode , materials science , electrochemistry , battery (electricity) , cyclic voltammetry , deposition (geology) , microstructure , fabrication , lamellar structure , nickel , analytical chemistry (journal) , metallurgy , chemistry , thermodynamics , medicine , paleontology , power (physics) , physics , alternative medicine , pathology , chromatography , sediment , biology
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.