Jiang Chunlei, Fang Yue, Zhang Wenyong, Song Xiaohe, Lang Jihui, Shi Lei, Tang Yongbing
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.
Angew Chem Int Ed Engl. 2018 Dec 10;57(50):16370-16374. doi: 10.1002/anie.201810575. Epub 2018 Nov 21.
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.
由于钠的天然丰度，钠离子电池（SIBs）是大规模储能的一种有前途的替代方案。然而，SIBs的实际应用仍然受到工作电压低、倍率性能差和循环稳定性不足的阻碍。现在提出了一种采用多离子设计的钠离子全电池。优化后的全电池提供了约4.0 V的高工作电压，这是已报道的钠离子全电池的最佳结果。此外，这种多离子电池在高达30 C的倍率下表现出良好的倍率性能，在5 C下500次循环后的容量保持率高达95%。尽管通过优化电解质和电极材料等方法，这种多离子电池的电化学性能可能会进一步提高，但所呈现的结果清楚地表明了这种多离子策略对于改善SIBs在可能的储能应用中的电化学性能的可行性。
