High‐Performance Aqueous Na–Zn Hybrid Ion Battery Boosted by “Water‐In‐Gel” Electrolyte,Advanced Functional Materials

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High‐Performance Aqueous Na–Zn Hybrid Ion Battery Boosted by “Water‐In‐Gel” Electrolyte
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2021-02-05 , DOI: 10.1002/adfm.202008783
Wending Pan ₁ , Yifei Wang ₁ , Xiaolong Zhao ₁ , Yan Zhao ₂ , Xinhua Liu ₃ , Jin Xuan ₄ , Huizhi Wang ₂ , Dennis Yiu Cheong Leung ₁

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Aqueous hybrid Na–Zn ion batteries (ASZIBs) are promising for large‐scale energy storage due to their low cost and potential for high output voltage. However, most ASZIBs show limited discharge voltage (<2.0 V) and capacity (<100 mAh g^–1) due to inefficient usage of the dual ions. In this study, a novel large‐electrochemical‐window “water‐in‐gel” electrolyte based CuHCF‐CNT/Zn Na–Zn hybrid battery is proposed, which achieves a high extraction voltage of Na ion (2.1 V vs Zn/Zn²⁺), together with a large discharge specific capacity (260 mAh g^–1) thanks to the Zn‐ion insertion, delivering a superior energy density of 440 Wh kg^–1. The hybrid battery also shows a high capacity retention of 96.8% after 450 cycles. Moreover, an ultrahigh discharge capacity of 1250 mAh g^–1 is achieved when further coupled with the Zn‐O₂ reaction, delivering the promising application of ion intercalation and metal–air hybrid battery.

中文翻译：

“水凝胶”电解质助长高性能Na-Zn水性混合离子电池

钠-锌混合离子水电池（ASZIBs）具有低成本和高输出电压潜力，有望用于大规模储能。但是，由于双离子使用效率低，大多数ASZIB的放电电压（<2.0 V）和容量（<100 mAh g ^–1）有限。在这项研究中，提出了一种新型的大电化学窗口“凝胶水”电解质基CuHCF-CNT / Zn Na-Zn混合电池，该电池可实现较高的Na离子提取电压（2.1 V vs Zn / Zn ^{2 +}），再加上大的放电比容量（260 mAh g ^–1），这要归功于Zn-ion的插入，可提供440 Wh kg ^–1的卓越能量密度。混合电池在450次循环后还显示出96.8％的高容量保持率。此外，当进一步与Zn-O ₂反应结合时，可获得1250 mAh g ^–1的超高放电容量，为离子嵌入和金属-空气混合电池提供了有希望的应用。

更新日期：2021-04-08

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