Volume 57, Issue 50 pp. 16370-16374
Communication

A Multi-Ion Strategy towards Rechargeable Sodium-Ion Full Batteries with High Working Voltage and Rate Capability

Dr. Chunlei Jiang

Dr. Chunlei Jiang

Functional Thin Films Research Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055 China

These authors contributed equally to this work.

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Yue Fang

Yue Fang

Functional Thin Films Research Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055 China

Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Siping, 136000 China

These authors contributed equally to this work.

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Wenyong Zhang

Wenyong Zhang

Functional Thin Films Research Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055 China

These authors contributed equally to this work.

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Xiaohe Song

Xiaohe Song

Functional Thin Films Research Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055 China

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Dr. Jihui Lang

Dr. Jihui Lang

Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Siping, 136000 China

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Lei Shi

Lei Shi

Functional Thin Films Research Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055 China

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Prof. Dr. Yongbing Tang

Corresponding Author

Prof. Dr. Yongbing Tang

Functional Thin Films Research Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055 China

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First published: 15 October 2018
Citations: 127

Graphical Abstract

Two ions in the fire: A multi-ion strategy to improve the electrochemical performance of sodium-ion full batteries is presented. The optimized sodium-ion-based multi-ion battery achieves a high working voltage of about 4.0 V, superior rate capability (up to 30 C; capacity retention: 87 %), and long cycling stability over 500 cycles at 5 C (capacity retention: 95 %).

Abstract

Sodium-ion batteries (SIBs) are a promising alternative for the large-scale energy storage owing to the natural abundance of sodium. However, the practical application of SIBs is still hindered by the low working voltage, poor rate performance, and insufficient cycling stability. A sodium-ion based full battery using a multi-ion design is now presented. The optimized full batteries delivered a high working voltage of about 4.0 V, which is the best result of reported sodium-ion full batteries. Moreover, this multi-ion battery exhibited good rate performance up to 30 C and a high capacity retention of 95 % over 500 cycles at 5 C. Although the electrochemical performance of this multi-ion battery may be further enhanced via optimizing electrolyte and electrode materials for example, the results presented clearly indicate the feasibility of this multi-ion strategy to improve the electrochemical performance of SIBs for possible energy storage applications.

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