CHEMISTRY AND MATERIAL SCIENCE

Synthesis 2D nanocrystals of Co-doped manganese oxide as cathode materials of zinc-ion hybrid supercapacitor

Artem A. Lobinsky, Maxim I. Tenevich

Ioffe Institute, Saint Petersburg, 194021, Russia

Abstract: In the present work, we propose a novel promising route for synthesis of Co-doped manganese oxide nanostructure via successive ionic layer deposition method as cathode material of zinc-ion hybrid supercapacitor. The synthesized nanolayers were analyzed by SEM, EDX and XRD. It was shown that the synthesized nanolayers were formed from ultrathin (6–8 nm) two-dimensional nanocrystals containing birnessite MnO$_2$ and hausmannite Mn$_3$O$_4$ crystal phases and having the morphology of “nanosheets”. Electrode based on nickel foam and Co-doped manganese oxide nanolayers exhibited a high specific capacity (514.5 F/g at 0.1 A/g) and excellent cycling stability (99% capacity retention after 1000 charge-discharge cycles). Obtained results demonstrate that the 2D Co-doped manganese oxide is a promising material for effective zinc-ion hybrid supercapacitor.

Keywords: nanocrystals, manganese oxides, electrode materials, cathodes, zn-ion hybrid supercapacitor.

Received: 15.08.2022
Revised: 09.10.2022
Accepted: 11.10.2022

Language: English

DOI: 10.17586/2220-8054-2022-13-5-525-529

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