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Issue 28, 2016
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SnO2 as a high-efficiency polysulfide trap in lithium–sulfur batteries

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Abstract

The ithium–sulfur battery stands as one of the most promising successors of traditional lithium-ion batteries due to its super high theoretical energy density, but practical application still suffers from the shuttle effect arising from soluble intermediate polysulfides. Here, we report SnO2 as a chemical adsorbent for polysulfides. As an interlayer between the cathode and separator, SnO2 gives better results to prevent the polysulfides from diffusing to the lithium anode than as a modifier of the carbon matrix directly. The lithium–sulfur battery with an SnO2 interlayer delivers an initial reversible capacity of 996 mA h g−1 and retains 832 mA h g−1 at the 100th discharge at 0.5 C, with a fading rate of only 0.19% per cycle. The improvements benefit from the quasi-open space provided by the interlayer configuration for the diffused sulfur species, which can largely relieve the loss of active substances caused by the volume effect during the lithiation/delithiation process.

Graphical abstract: SnO2 as a high-efficiency polysulfide trap in lithium–sulfur batteries

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Publication details

The article was received on 21 Mar 2016, accepted on 15 Jun 2016 and first published on 16 Jun 2016


Article type: Paper
DOI: 10.1039/C6NR02345B
Citation: Nanoscale, 2016,8, 13638-13645
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    SnO2 as a high-efficiency polysulfide trap in lithium–sulfur batteries

    J. Liu, L. Yuan, K. Yuan, Z. Li, Z. Hao, J. Xiang and Y. Huang, Nanoscale, 2016, 8, 13638
    DOI: 10.1039/C6NR02345B

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