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Single lithium-ion channel polymer binder for stabilizing sulfur cathodes.

ABSTRACT: Lithium-sulfur batteries have great potential for high-performance energy-storage devices, yet the severe diffusion of soluble polysulfide to electrolyte greatly limits their practical applications. To address the above issues, herein we design and synthesize a novel polymer binder with single lithium-ion channels allowing fast lithium-ion transport while blocking the shuttle of unnecessary polysulfide anions. In situ UV-vis spectroscopy measurements reveal that the prepared polymer binder has effective immobilization to polysulfide intermediates. As expected, the resultant sulfur cathode achieves an excellent specific capacity of 1310 mAh g^-1 at 0.2 C, high Coulombic efficiency of 99.5% at 0.5 C after 100 cycles and stable cycling performance for 300 cycles at 1 C (1 C = 1675 mA g^-1). This study reports a new avenue to assemble a polymer binder with a single lithium-ion channel for solving the serious problem of energy attenuation of lithium-sulfur batteries.

SUBMITTER: Niu C

PROVIDER: S-EPMC8288923 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature

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Single lithium-ion channel polymer binder for stabilizing sulfur cathodes.

Niu Chaoqun C Liu Jie J Qian Tao T Shen Xiaowei X Zhou Jinqiu J Yan Chenglin C

National science review 20191012 2

Lithium-sulfur batteries have great potential for high-performance energy-storage devices, yet the severe diffusion of soluble polysulfide to electrolyte greatly limits their practical applications. To address the above issues, herein we design and synthesize a novel polymer binder with single lithium-ion channels allowing fast lithium-ion transport while blocking the shuttle of unnecessary polysulfide anions. <i>In situ</i> UV-vis spectroscopy measurements reveal that the prepared polymer binde ...[more]

PMID: 34692047

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