Substituting copolymeric poly(alkylenetetrasulfide) for elemental sulfur to diminish the shuttling effect of modified intermediate polysulfides for high-performance lithium-sulfur batteries.
Substituting copolymeric poly(alkylenetetrasulfide) for elemental sulfur to diminish the shuttling effect of modified intermediate polysulfides for high-performance lithium-sulfur batteries.
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DOI：
10.1039/c8cc09972c
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发表时间：
2019-03
影响因子：
4.9
通讯作者：
He Zhou;Faqi Yu;Min Wei;Yunlan Su;Yuchen Ma;Dujing Wang;Q. Shen
中科院分区：
文献类型：
--
作者：
He Zhou;Faqi Yu;Min Wei;Yunlan Su;Yuchen Ma;Dujing Wang;Q. Shen
合成了聚四硫化二烯（PS），用于壳聚糖衍生的多孔碳（CPC）基锂硫电池复合正极材料。在多硫化物的S-S键之间引入-CH 2-或-CH 2CH 2-单元（例如，Li_2S_4 → Li-S_2-CH_2-S-Li或Li-S-CH_2CH_2-S-Li）减小了不利的穿梭效应。
Poly(alkylenetetrasulfide) can be synthesized to replace sulfur in a chitosan-derived porous carbon (CPC) based composite cathode of lithium-sulfur batteries. Introducing a -CH2- or -CH2CH2- unit in-between the S-S bond of a polysulfide (e.g., Li2S4 → Li-S2-CH2-S-Li or Li-S-CH2CH2-S-Li) diminishes the adverse shuttling effect, proved by experimental tests and first-principle calculations.