文献类型：期刊文献

英文题名：A multifunctional electrolyte additive for zinc-ion capacitors with low temperature resistant and long lifespan

作者：Sun, Ming[1];Zhang, Zekai[2,3];Fu, Shuqing[4];Zhang, Yifan[1];Wang, Ruoyu[1];Mu, Hongchun[2,3];Lian, Cheng[2,3];Wang, Wenqiang[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;[2]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Frontiers Sci Ctr Materiobiol & Dynam Chem, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[4]Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai 200438, Peoples R China

年份：2024

卷号：94

起止页码：477

外文期刊名：JOURNAL OF ENERGY CHEMISTRY

收录：;EI(收录号：20241415833676);WOS:【SCI-EXPANDED(收录号:WOS:001219376800001)】；

基金：We greatly appreciate the financial supports of the National Natural Science Foundation of China (22109045, 21875065) and the China Postdoctoral Science Foundation Funded Project (2021M701191).

语种：英文

外文关键词：Zinc -ion capacitors; Electrolyte additive; Dendrite -free; Freeze-resistant electrolyte

摘要：Aqueous zinc -ion capacitors (ZICs) are considered as potential candidates for next generation electrochemical energy storage devices due to their high safety and low cost. However, the existing aqueous ZICs usually have the problems of zinc dendrite growth and unsatisfactory performance at low temperature. Herein, an erythritol (Eryt) additive with inhibition of zinc dendrites and anti-freezing capability was introduced into the ZnSO 4 electrolyte. The experimental characterization and theoretical calculation confirm that the Eryt adsorbed on the surface of zinc anodes regulates the deposition orientation of Zn 2+ and inhibits the formation of dendrites. It also reconstructs the solvation structure in the electrolyte to reduce water activity, enabling the electrolyte to have a lower freezing point for operation at low temperature. With the assistance of Eryt, the Zn||Zn symmetric cell exhibits a long cycle life of 2000 h, while the ZIC assembled with activated carbon (AC) cathode and zinc anode (Zn||AC) maintains a capacity retention of 98.2% after 30,000 cycles at a current density of 10 A g -1 (even after 10,000 cycles at -20 degrees C, the capacity retention rate reached 94.8%.). This work provides a highly scalable, low-cost and effective strategy for the protection of the anodes of low-temperature aqueous ZICs. (c) 2024 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.