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The effect of different poly fibers separator-modified materials on blocking polysulfides for high performance Li-S batteries.

ABSTRACT: Herein, we reported that KOH impregnation can generate a large number of porous structures with fruitful nitrogen self-doped groups during the carbonized process for poly (p-phenylene terephthalamide) fiber and poly (p-phenylene benzobisoxazole) fiber (denoted as PPTA and PBO, respectively). The intrinsical insulation, volume change, and shuttle effect of polysulfides then can be more significantly improved for the PBO-coated separator than the PPTA case. The discharge capacity primary achieves 1,322 mA h/g, which retains 827 mA h/g even after 200 cycles at 0.2 C for the cell with PBO-coated separator. The reversible specific discharge capacity maintains 841 mA h/g with a Coulomb efficiency of 99.7% at 5 C. The nitrogen self-doped nanocarbon particles are etched by KOH with the simple one-step preparation, which has promising application as Li-S battery cathode.

SUBMITTER: Meng L

PROVIDER: S-EPMC9403007 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature

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The effect of different poly fibers separator-modified materials on blocking polysulfides for high performance Li-S batteries.

Meng Ling L Sun Zhaoxia Z Sun Guanghang G Zhang Xiting X Dan Meng M Long Jin J Hu Jian J

Frontiers in chemistry 20220811

Herein, we reported that KOH impregnation can generate a large number of porous structures with fruitful nitrogen self-doped groups during the carbonized process for poly (p-phenylene terephthalamide) fiber and poly (p-phenylene benzobisoxazole) fiber (denoted as PPTA and PBO, respectively). The intrinsical insulation, volume change, and shuttle effect of polysulfides then can be more significantly improved for the PBO-coated separator than the PPTA case. The discharge capacity pri ...[more]

PMID: 36034673

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