Issue 28, 2016

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

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

Supplementary files

Article information

Article type
Paper
Submitted
21 Mar 2016
Accepted
15 Jun 2016
First published
16 Jun 2016

Nanoscale, 2016,8, 13638-13645

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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