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

Shanghai Jiao Tong University Journal Center

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

Caption

  • 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.

Credit

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.

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License

CC BY-NC-ND

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