Screening Anionic Groups Within Zwitterionic Additives for Eliminating Hydrogen Evolution and Dendrites in Aqueous Zinc Ion Batteries

作者：Biao Wang, Chaohong Guan, Qing Zhou, Yiqing Wang, Yutong Zhu, Haifeng Bian, Zhou Chen, Shuangbin Zhang, Xiao Tan, Bin Luo, Shaochun Tang, Xiangkang Meng, Cheng Zhang · 发表于：Nano-Micro Letters · 年份：2025 · DOI：10.1007/s40820-025-01826-w · 被引用次数：51 · 研究领域：Medicine

Three zwitterions with identical quaternary ammonium cations but distinct anionic groups, i.e. carboxylate, sulfonate and phosphate, show distinct impact in aqueous zinc ion batteries. The zwitterion with phosphate group (2-methacryloyloxyethyl phosphorylcholine, MPC) uniquely promotes oriented Zn (002) plane deposition and provides pH buffering capability, effectively suppressing dendrite formation and side reactions. The Zn//NaVO full cell with MPC additive delivers an ultralong cycling life of 4000 cycles with an exceptionally low capacity decay of 0.014% per cycle. Three zwitterions with identical quaternary ammonium cations but distinct anionic groups, i.e. carboxylate, sulfonate and phosphate, show distinct impact in aqueous zinc ion batteries. The zwitterion with phosphate group (2-methacryloyloxyethyl phosphorylcholine, MPC) uniquely promotes oriented Zn (002) plane deposition and provides pH buffering capability, effectively suppressing dendrite formation and side reactions. The Zn//NaVO full cell with MPC additive delivers an ultralong cycling life of 4000 cycles with an exceptionally low capacity decay of 0.014% per cycle. Zwitterionic materials with covalently tethered cations and anions have great potential as electrolyte additives for aqueous Zn-ion batteries (AZIBs) owing to their appealing intrinsic characteristics and merits. However, the impact of cationic and anionic moieties within zwitterions on enhancing the performance of AZIBs remains poorly understood...