Prussian Blue Cathode Materials for Aqueous Sodium-ion Batteries: Preparation and Electrochemical Performance

【Author】

LI Yong;HE Wei-Xin;ZHENG Xin-Yue;YU Sheng-Lan;LI Hai-Tong;LI Hong-Yi;ZHANG Rong;WANG Yu

【Institution】

School of Materials Science and Engineering, Nanchang University;School of Materials Science and Engineering, Nanchang University;School of Materials Science and Engineering, Nanchang University;College of Chemistry, Biology and Material Science, East China University of Technology;School of Materials Science and Engineering, Nanchang University;School of Materials Science and Engineering, Nanchang University;School of Materials Science and Engineering, Nanchang University;School of Materials Science and Engineering, Nanchang University

【Abstract】

Prussian blue (PB) is a kind of metal-organic framework complex that displays wide application prospect as cathode material for aqueous sodium-ion batteries. In this study, PB composites were prepared by a single source method. Furthermore, the effects of reaction temperature, time and concentration of hydrochloric acid on the PB morphology and electrochemical performance were systematically investigated. The results showed that the crystallinity and electrochemical stability of PB were improved by increasing the reaction temperature. The aqueous sodium-ion battery with the PB synthesized at 80 °C as cathode material displayed a capacity retention of 93.9% after 100 cycles. The particle size of PB grew with the extension of reaction time until 6 h. It exhibited that the extended reaction time was beneficial to the cycle performance of device fabricated with PB prepared for 10 h, delivering 90% capacity retention after 100 cycles. Increment of the hydrochloric acid concentration changed the surface morphology, and thus improved the electrochemical performance of PB. When the concentration of hydrochloric acid reached 0.20 mol/L, a capacity of 67.5 mAh/g could be maintained after 100 cycles. This work may provide theoretical and experimental guidance for preparing high-performance PB-based aqueous sodium-ion batteries.

【Keywords】

aqueous sodium-ion battery;single source method;Prussian blue;cycle performance

References

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Total: 8 articles

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