In Situ BaSO4 Coating Enabled Activation-Free and Ultra-Stable Δ-Mno2 for Aqueous Zn-ion Batteries.

Lele Liu,Shouxiang Ding,Lu Yao,Mingqiang Liu,Shunning Li,Qinghe Zhao,Runzhi Qin,Feng Pan

Chemical communications（2023）

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摘要

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.

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