A Double‐Charged Organic Molecule Additive to Customize Electric Double Layer for Super‐Stable and Deep‐Rechargeable Zn Metal Pouch Batteries

Abstract The electrochemical performance of aqueous zinc metal batteries (AZMBs) is highly dependent on the electric double layer (EDL) properties at Zn electrode/electrolyte interface. Herein, a novel reconfigured EDL is constructed via a double‐charged theanine (TN) additive for super‐stable and deep‐rechargeable AZMBs. Experiments and theoretical computations unravel that the positively charged TN not only serves as preferential anchor to form a water‐poor Helmholtz plane onto the Zn anode, but also its anionic end could coordinate with Zn 2+ to tailor the solvation structure in the diffusion layer and further reconstruct the inner H‐bonds networks, thus effectively guiding uniform Zn deposition and…

• NN
  National Natural Science Foundation of China

  Awards: Grant No. 22308066, 61964002, 22308066
• NS
  Natural Science Foundation of Guangxi Province

  Award: No. 2021GXNSFBA196066
• GU
  Guangxi University
• GK
  Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University

  Award: No. 2022K004
• SR
  Specific Research Project of Guangxi for Research Bases and Talents

  Awards: 2021AC19353, 2022AC20018