Activating Transition-Metal Oxides through In Situ Regulation of Lower Hubbard Band for Catalytic Conversion of Lithium Polysulfides DOI
Pan Zeng, Yong‐Sheng Hu, Bin Su

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: April 30, 2025

Catalytic conversion of lithium polysulfides (LiPSs) is regarded as an effective avenue to tackle the shuttle effect lithium-sulfur (Li-S) batteries, especially based upon transition-metal oxides (TMOs). However, activity origin and corresponding mechanistic insights into such catalytic systems remain elusive. Herein, activated state associated with lower Hubbard band (LHB) transition proposed elucidate TMOs by taking Mn3O4 a model electrocatalyst. Specifically, broadening LHB width, upshift position, orbital rearrangement LHB, triggered in situ substitution O atoms S LiPSs under working conditions, synergistically enable fast electron transfer modulate adsorption capability moderate level. Benefiting from these advantages, electrocatalyst converted torpid for expediting LiPS conversion. Eventually, Li-S batteries assembled deliver excellent rate performance over 6 C outstanding cycling stability 1000 cycles. Moreover, Ah-scale pouch cell constructed delivers notable energy density 388.1 W h kg-1. Our work offers promising pathway on regulation designing high-performance electrocatalysts beyond.

Language: Английский

Activating Transition-Metal Oxides through In Situ Regulation of Lower Hubbard Band for Catalytic Conversion of Lithium Polysulfides DOI
Pan Zeng, Yong‐Sheng Hu, Bin Su

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: April 30, 2025

Catalytic conversion of lithium polysulfides (LiPSs) is regarded as an effective avenue to tackle the shuttle effect lithium-sulfur (Li-S) batteries, especially based upon transition-metal oxides (TMOs). However, activity origin and corresponding mechanistic insights into such catalytic systems remain elusive. Herein, activated state associated with lower Hubbard band (LHB) transition proposed elucidate TMOs by taking Mn3O4 a model electrocatalyst. Specifically, broadening LHB width, upshift position, orbital rearrangement LHB, triggered in situ substitution O atoms S LiPSs under working conditions, synergistically enable fast electron transfer modulate adsorption capability moderate level. Benefiting from these advantages, electrocatalyst converted torpid for expediting LiPS conversion. Eventually, Li-S batteries assembled deliver excellent rate performance over 6 C outstanding cycling stability 1000 cycles. Moreover, Ah-scale pouch cell constructed delivers notable energy density 388.1 W h kg-1. Our work offers promising pathway on regulation designing high-performance electrocatalysts beyond.

Language: Английский

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