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Two-dimensional Nafion nanoweb anion-shield for improved electrochemical performances of lithium–sulfur batteries

Author:
Kim, Joo Hyun, Choi, Junghyun, Seo, Jihoon, Kwon, Jiseok, Paik, Ungyu
Source:
Journal of materials chemistry A 2016 v.4 no.29 pp. 11203-11206
ISSN:
2050-7496
Subject:
batteries, cathodes, electrochemistry, electrostatic interactions, sulfur
Abstract:
We first demonstrate a facile and effective strategy to directly deposit a Nafion nanoweb onto a sulfur cathode to address the challenges underlying in Li–S batteries. The Nafion nanoweb not only blocks the diffusion of polysulfides by electrostatic repulsion but also allows fast Li-ion exchange with the sulfur cathode through the selective protection layer. The Nafion nanoweb-sulfur cathode retained an excellent cycle performance over 200 cycles and delivered an improved rate capability, as compared to a sulfur cathode and a Nafion layer-sulfur cathode.
Agid:
6418219