文献类型：期刊文献

英文题名：Long-lifespan Zinc-ion Capacitors Enabled by Anodes Integrated with Interconnected Mesoporous Chitosan Membranes through Electrophoresis-driven Phase Separation

作者：Wang, Ruoyu[1];Wang, Wenqiang[1];Sun, Ming[1];Hu, Yanjie[1];Wang, Gengchao[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China

年份：2024

卷号：63

期号：10

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20240615511803);WOS:【SCI-EXPANDED(收录号:WOS:001156477200001)】；

基金：We greatly appreciate the financial supports of National Natural Science Foundation of China (22109045, 21875065) and the China Postdoctoral Science Foundation Special Fund (2022T150211).

语种：英文

外文关键词：Zinc ion capacitors; chitosan; mesoporous membranes; electrophoresis; phase separation

摘要：The advancement of highly secure and inexpensive aqueous zinc ion energy storage devices is impeded by issues, including dendrite growth, hydrogen evolution and corrosion of zinc anodes. It is essential to modify the interface of zinc anodes that homogenizes ion flux and facilitates highly reversible zinc planarized deposition and stripping. Herein, by coupling zinc ion coordination with acid-base neutralization under the driving of electrophoresis, manageable mesoscopic phase separation for constructing chitosan frameworks was achieved, thereby fabricating interconnected mesoporous chitosan membranes based heterogeneous quasi-solid-state electrolytes integrated with anodes. The framework is constructed by twisted chitosan nanofiber bundles, forming a three-dimensional continuous spindle-shaped pore structure. With this framework, the electrolyte provides exceptional ion conductivity of 25.1 mS cm-1, with a puncture resistance strength of 2.3 GPa. In addition, the amino groups of chitosan molecule can make the surface of the framework positively charged. Thus, reversible zinc planarized deposition is successfully induced by the synergistic effect of stress constraint and electrostatic modulation. As a result, as-assembled zinc ion capacitor has an excellent cycle life and sustains the capacity by over 95 % after 20000 cycles at a current density of 5 A g-1. This research presents a constructive strategy for stable electrolytes-integrated zinc anodes. Interconnected mesoporous chitosan membranes based heterogeneous quasi-solid-state electrolytes integrated with anodes are fabricated through electrophoresis. Reversible zinc planarized deposition is successfully induced by the synergistic effect of stress constraint and electrostatic modulation, endowing zinc ion capacitors with ultra-high stability.+ image