Bipolar Organic Polymer for High Performance Symmetric Aqueous Proton Battery,Small Methods

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Bipolar Organic Polymer for High Performance Symmetric Aqueous Proton Battery
Small Methods ( IF 10.7 ) Pub Date : 2021-06-26 , DOI: 10.1002/smtd.202100367
Tianjiang Sun ₁ , Haihui Du ₁ , Shibing Zheng ₁ , Jinqiang Shi ₁ , Xuming Yuan ₁ , Lin Li ₁ , Zhanliang Tao ₁

Affiliation

Bipolar electroactive organic molecules receive an increasing research attention as electrode materials for rechargeable batteries due to their flexibility, controllability, and environmental friendliness. While its application for symmetric aqueous proton batteries is still in its infancy. Herein, a symmetric aqueous proton battery (APB) based on a bipolar poly(aminoanthraquinone) (PNAQ) is developed. The conductivity and solubility of PNAQ are significantly improved by introducing a polyaniline-like skeleton. It is demonstrated that the quinone-based moieties allow H⁺ reversible uptake/removal and the benzene ring-based units achieve HSO₄^– adsorption/desorption. The fabricated symmetric APB exhibits a high discharge capacity of 85.3 mA h g^–1 at 5 C and excellent rate performance (77 mA h g^–1 at 100 C). The good rate performance benefits from capacitance-like ions diffusion mechanism. Furthermore, surprisingly, the system can also operate at −70 °C and shows superior electrochemical performance (60.4 mA h g^–1 at −70 °C).

中文翻译：

用于高性能对称水性质子电池的双极有机聚合物

双极电活性有机分子由于其灵活性、可控性和环境友好性，作为可充电电池的电极材料受到越来越多的研究关注。而其在对称水性质子电池中的应用仍处于起步阶段。在此，开发了一种基于双极聚（氨基蒽醌）（PNAQ）的对称水性质子电池（APB）。通过引入类聚苯胺骨架，PNAQ 的导电性和溶解性得到显着提高。结果表明，基于醌的部分允许 H ⁺可逆吸收/去除，而基于苯环的单元实现 HSO ₄^-吸附/解吸。制造的对称 APB 具有 85.3 mA hg ^–1的高放电容量在 5 C 和优异的倍率性能（77 mA hg ^–1在 100 C）。良好的倍率性能得益于类似电容的离子扩散机制。此外，令人惊讶的是，该系统还可以在 -70 °C 下运行并显示出优异的电化学性能（-70 °C 下为60.4 mA hg ^–1）。

更新日期：2021-08-12

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