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• W4293581465 abstract "Lithium-sulfur battery is an appealing battery system, but it also suffers from the shuttle effect of lithium polysulfide (LiPS) and an unstable cycling life. Physical constraints to polysulfide via coating and chemical constraints from Lewis Acid-Based catalysis are considered as two promising solutions to achieve improvements. Herein, we design a porous polypyrrole-coated cobalt-rich bimetallic oxide (CoFe 2 O 4 @PPy) via a simple method. It endows the cathode with abundant pore structure and adsorption/catalytic sites (N/O and Fe/Co), which can alleviate the polysulfide shuttle phenomenon and protect from sulfur lost. Because of an important synergy between physical and chemical constraints applied to LiPS, CoFe 2 O 4 @PPy/S composite cathode shows excellent performance with a low capacity decay rate of 0.035% per cycle after 300 cycles at 1 C. By in-situ etching and catalysis, a porous polypyrrole-coated cobalt-rich bimetallic oxide was prepared as a sulfur carrier, which provides a dual physical and chemical constrain effect on polysulfides, and exhibits stable cycle performance. It can circulate 300 cycles at a current density of 1 C with a capacity loss per cycle as low as 0.035%. • A simple HCl etching method was utilized to fabricate a porous structure with in-situ polymerized PPy coating cobalt-rich bimetallic oxide. • The porous structure and abundant adsorption/catalytic sites (N/O and Fe/Co) to polysulfide offer synergy of physical and chemical constrain, which endows the battery with stable cycling performance. • It can circulate 300 cycles at a current density of 1 C with a capacity loss per cycle as low as 0.035%." @default.
• W4293581465 created "2022-08-30" @default.
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• W4293581465 date "2022-12-01" @default.
• W4293581465 modified "2023-10-17" @default.
• W4293581465 title "Synergy of physical and chemical constraints for stable lithium-sulfur batteries" @default.
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• W4293581465 doi "https://doi.org/10.1016/j.jallcom.2022.167038" @default.
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