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Functionalized boron nitride nanosheets/graphene interlayer for fast and long-life lithium–sulfur batteries

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journal contribution
posted on 01.07.2017, 00:00 authored by Ye Fan, Z Yang, W Hua, Dan LiuDan Liu, Tao Tao, Md Mokhlesur RahmanMd Mokhlesur Rahman, Weiwei LeiWeiwei Lei, S Huang, Ying (Ian) ChenYing (Ian) Chen
Lithium–sulfur (Li–S) batteries have a much higher energy density than Li ion batteries and thus are considered as next generation batteries for electric vehicle applications. However, the problem of rapid capacity fading due to the shuttling of soluble polysulfides between electrodes remains the main obstacle for practical applications. Here, a thin and selective interlayer structure has been designed and produced to decrease the charge transfer resistance and mitigate the shuttling problem, simply by coating the surface of cathode with a thin film of functionalized boron nitride nanosheets/graphene. Due to this thin and ultralight interlayer, the specific capacity and cycling stability of the Li–S batteries with a cathode of sulfur-containing porous carbon nanotubes (≈60 wt% sulfur content) have been improved significantly with a life of over 1000 cycles, an initial specific capacity of 1100 mA h g −1 at 3 C, and a cycle decay as low as 0.0037% per cycle. This new interlayer provides a promising approach to significantly enhance the performance of Li–S batteries.

History

Journal

Advanced energy materials

Volume

7

Issue

13

Article number

1602380

Pagination

1 - 6

Publisher

Wiley

Location

Chichester, Eng.

ISSN

1614-6832

eISSN

1614-6840

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2017, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim