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- W3098030949 abstract "Lithium-sulfur (Li-S) batteries are hampered by the infamous shuttle effect and slow redox kinetics, resulting in rapid capacity decay. Herein, a bifunctional catalysis CoB/[email protected] with integrated structure and synergy effect between adsorption and catalysis is proposed to solve the above problems. The integrated CoB and BN are simultaneously and uniformly introduced on the rGO substrate through a one-step calcination strategy, applied to modify the cathode side of PP separator. The transition metal borides can catalyze the conversion of lithium polysulfides (Li2Sn, n ≥ 4), whereas the bond of B-S is too weak to absorb LPS. Thus BN introduced can effectively restrict the diffusion of polysulfides via strong chemisorption with LiSnLi+ ⋯N, while the rGO substrate ensures smooth electron transfer for redox reaction. Therefore, through the integrated adsorption/catalysis, the shuttle effect is suppressed, the kinetics of redox reaction is enhanced, and the capacity decay is reduced. Using CoB/[email protected] modified PP separator, the Li-S batteries with high initial capacity (1450 mAh g−1 at 0.35 mA cm−2) and long-cycle stability (700 cycles at 1.74 mA cm−2 with a decay rate of 0.032% per cycle) are achieved. This work provides a novel insight for the preparation of bifunctional catalysis with integrated structure for long-life Li-S batteries." @default.
- W3098030949 created "2020-11-23" @default.
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- W3098030949 date "2021-08-01" @default.
- W3098030949 modified "2023-10-14" @default.
- W3098030949 title "CoB and BN composites enabling integrated adsorption/catalysis to polysulfides for inhibiting shuttle-effect in Li-S batteries" @default.
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- W3098030949 doi "https://doi.org/10.1016/j.jechem.2020.11.015" @default.
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