Issue 5, 2016

Rational design of a nested pore structure sulfur host for fast Li/S batteries with a long cycle life

Abstract

A nested pore structure carbon with spherical quad-modal pores was designed and used as a sulfur host material in Li/S batteries. The carbon pores were interconnected and there was an orderly distribution of 2.5, 15, 24 and 100 nm pores, giving a high pore volume of 4.15 cm3 g−1. The delicate nested pore structure allowed a uniform distribution of sulfur and rapid access of the electrolyte across the carbon, leading to an excellent C-rate performance and cycle stability. Even at 3C, the C/S composite containing 78 wt% S still delivered a maximum discharge capacity of 1228 mA h g−1 and maintained a reversible capacity of 914 mA h g−1 after 200 cycles.

Graphical abstract: Rational design of a nested pore structure sulfur host for fast Li/S batteries with a long cycle life

Article information

Article type
Paper
Submitted
07 Nov 2015
Accepted
13 Dec 2015
First published
14 Dec 2015

J. Mater. Chem. A, 2016,4, 1653-1662

Rational design of a nested pore structure sulfur host for fast Li/S batteries with a long cycle life

M. Wang, H. Zhang, W. Zhou, X. Yang, X. Li and H. Zhang, J. Mater. Chem. A, 2016, 4, 1653 DOI: 10.1039/C5TA08999A

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