可逆Na15Sn4合金补偿硬碳阳极以提高钠离子电池初始库仑效率

IF 4.3 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Chemical Communications Pub Date : 2025-05-01 DOI:10.1039/d5cc01672j

Ran Wei, Qingsong Lai, Rui Yang, Qi Li, Kejie Mou, Dong-Run Yang, Zhaomeng Liu, Xuanwen Gao, Qinfen Gu, Wenbin Luo

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引用次数: 0

摘要

一种有效的钠补偿策略是将Na15Sn4合金作为动态钠储层与硬碳（HC）阳极结合，在低电位下（<0.5 V vs. Na + /Na）进行可逆脱合金处理，释放活性Na离子，从而补偿初始循环过程中不可逆的钠损失。在Na3V2(PO4)3阴极系统中，NaSn@HC的全电池结构达到90.1%的ICE，比传统的硬碳阳极高出50%以上。

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Reversible Na15Sn4 alloy compensation for hard carbon anodes to enhance initial coulombic efficiency in sodium-ion full cells†

An effective sodium compensation strategy employs Na15Sn4 alloy as a dynamic sodium reservoir paired with hard carbon (HC) anodes, undergoing reversible dealloying at low potentials (<0.5 V vs. Na⁺/Na) to release active Na ions, thereby compensating for irreversible sodium losses during initial cycles. The Full-cell configurations with NaSn@HC in Na3V2(PO4)3 cathode system achieve 90.1% ICE, outperforming conventional hard carbon anodes by more than 50%.

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来源期刊

Chemical Communications 化学-化学综合

CiteScore

8.60

自引率

4.10%

发文量

2705

审稿时长

1.4 months

期刊介绍： ChemComm (Chemical Communications) is renowned as the fastest publisher of articles providing information on new avenues of research, drawn from all the world''s major areas of chemical research.