Construction of ultrathin solid electrolyte interface on Zn anode within 1 min for high current operating condition

Organic acid treatment can facilitate the in-situ formation of a solid electrolyte interface (SEI) on Zn foil protecting the anode from corrosion. However, the generation of hydrogen (H 2 ) during this process is inevitable, which is often considered detrimental to getting compact SEI. Herein, a H 2 film-assisted method is proposed under concentrated Amino-Trimethylene-Phosphonic-Acid to construct ultrathin and dense SEI within 1 min. Specifically, the (0   0   2) crystal planes survive from the etching process of 1 min due to the adhered H 2 , inducing uniform deposition and enhanced corrosion-resistance. Moreover, the H 2 can effectively regulate the reaction rate, leading to ultrathin SEI and initiating a morphology preservation behavior, which has been neglected by the previous reports. The quick-formed SEI has excellent compatibility, low resistance and effective isolation of electrolyte/anode, whose advantages work together with exposed (0   0   2) planes to get accustomed to high-current surge, leading to the ZAC1@Zn//ZAC1@Zn consistently cycling over 800 h at 15 mA cm −2 and 15 mAh cm −2 , the ZAC1@Zn//Cu preserves high reversibility (CE 99.7 %), and the ZAC1@Zn//MVO exhibits notable capacity retention at 191.7 mAh/g after 1000 cycles.