Mesoporous Ti4O7 Nanosheets with High Polar Surface Area for Catalyzing Separator to Reduce the Shuttle Effect of Soluble Polysulfides in Lithium‐sulfur Batteries

In the effort to accelerate adsorption and catalytic conversion of lithium polysulfides (Li‐PSs) and suppress the shuttle effect of lithium‐sulfur batteries (LSBs), the Ti4O7 nanosheets/carbon material‐modified separator is successfully fabricated to reducing soluble Li‐PSs’ crossover from cathode t...

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Veröffentlicht in:Chemistry, an Asian journal an Asian journal, 2022-07, Vol.17 (14), p.n/a
Hauptverfasser: Zhou, Chuang‐An, Sun, Xiuyu, Yan, Wei, Zuo, Yinze, Zhang, Jiujun
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container_issue 14
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container_title Chemistry, an Asian journal
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creator Zhou, Chuang‐An
Sun, Xiuyu
Yan, Wei
Zuo, Yinze
Zhang, Jiujun
description In the effort to accelerate adsorption and catalytic conversion of lithium polysulfides (Li‐PSs) and suppress the shuttle effect of lithium‐sulfur batteries (LSBs), the Ti4O7 nanosheets/carbon material‐modified separator is successfully fabricated to reducing soluble Li‐PSs’ crossover from cathode to anode. The catalyst of mesoporous Ti4O7 nanosheets with O−Ti−O units synthesized at low temperature shows both excellent conductivity and high surface area. The modified separator can serve as a diffusion barrier of Li‐PSs and catalyst for converting soluble low‐chain sulfides into insoluble ones and then remarkably enhance the sulfur utilization and electrochemical performance of the LSB. This work provides a feasible avenue in both design and synthesis of mesoporous catalyst materials for suppressing the shuttle effect of lithium‐sulfur batteries. The catalyst of M−Ti4O7‐6 NS with O−Ti−O units shows both excellent conductivity and high surface area, which is beneficial to effectively accelerate adsorption and catalytic conversion of Li‐PSs and largely suppress the shuttle effect of LSBs. When this M−Ti4O7‐6 NS are used for the catalyst coated on the separator, the modified separator with CB/M−Ti4O7‐6 NS catalyst layer can serve as a diffusion barrier of Li‐PSs and significantly enhance electrochemical performance of LSBs.
doi_str_mv 10.1002/asia.202200328
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The catalyst of mesoporous Ti4O7 nanosheets with O−Ti−O units synthesized at low temperature shows both excellent conductivity and high surface area. The modified separator can serve as a diffusion barrier of Li‐PSs and catalyst for converting soluble low‐chain sulfides into insoluble ones and then remarkably enhance the sulfur utilization and electrochemical performance of the LSB. This work provides a feasible avenue in both design and synthesis of mesoporous catalyst materials for suppressing the shuttle effect of lithium‐sulfur batteries. The catalyst of M−Ti4O7‐6 NS with O−Ti−O units shows both excellent conductivity and high surface area, which is beneficial to effectively accelerate adsorption and catalytic conversion of Li‐PSs and largely suppress the shuttle effect of LSBs. 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subjects catalyst
Catalysts
Catalytic converters
Chemical synthesis
Chemistry
Diffusion barriers
Electrochemical analysis
Lithium sulfur batteries
Lithium-sulfur battery
Low temperature
Mesoporous nanosheets
Modified separator
Nanosheets
Polysulfides
Separators
shuttle effect
Surface area
Ti4O7
title Mesoporous Ti4O7 Nanosheets with High Polar Surface Area for Catalyzing Separator to Reduce the Shuttle Effect of Soluble Polysulfides in Lithium‐sulfur Batteries
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