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In situ BaSO4 coating enabled activation-free and ultra-stable δ-MnO2 for aqueous Zn-ion batteries
Lele Liu1, Shouxiang Ding1, Lu Yao1
1School of Advanced Materials, Peking University Shenzhen Graduate School, Shenzhen 518055, P. R. China. zhaoqh@pku.edu.cn.
Chemical Communications (Cambridge, England)
|May 2, 2023
Abstract:
In situ BaSO4 coating, generated in the first discharging of Ba2+ pre-intercalated δ-MnO2, shortens the activation process by inducing fast proton intercalation and stabilizes the MnO2 crystal by suppressing Mn dissolution. The cathode delivers a decent electrochemical performance of 210 mA h g-1 at 1C with a 98% retention after 200 cycles.
