Surface structure control and charge/discharge characteristics of bismuth anode materials by electrodeposition for magnesium-ion batteries

• Published in: Journal of materials science. Materials in electronics Vol. 32; no. 8; pp. 9990 - 9997
• Main Authors: Narumoto, Natsuki, Okamoto, Naoki, Saito, Takeyasu
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.04.2021; Springer Nature B.V
• Subjects: Alternative energy sources; Anodes; Batteries; Bismuth; Characterization and Evaluation of Materials; Charge transfer; Charging; Chemistry and Materials Science; Control equipment; Crystal structure; Crystallography; Diffusion rate; Discharge; Electrochemical analysis; Electrode materials; Electrodeposition; Electrodes; Electrolytes; Energy storage; Magnesium; Materials Science; Morphology; Optical and Electronic Materials; Physical properties; Renewable resources; Spectrum analysis; Storage batteries; Surface structure; Thin films
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-021-05656-5

Bismuth is considered one of the promising anode materials for the magnesium-ion secondary battery (MIB), but it has a short cycle life because of the sluggish diffusion of Mg 2+ into the Bi anode and the slow interfacial charge transfer. In this study, we employed electrodeposition as a simple method to deposit the Bi thin films as an anode material for MIB and tried to control the surface structure of the films. In addition, we measured the deposition behavior while varying experimental parameters. The crystallographic structure, surface morphology, and electrochemical performance of the Bi anodes were evaluated by X-ray diffraction, scanning electron microscopy, and a charging/discharging control device, respectively. Then, the relationships between the physical properties and charging/discharging characteristics of the Bi anode were investigated. In particular, a Bi electrode with the thickness of 1.5 μm deposited at a density of 10 mA/cm 2 showed good cycling capability; its capacity at the 50th cycle was 101 mAh/g.