A strategy of using temporary space-holders to increase the capacity for Li-S batteries

Zhu Mingyang, Nannan Wang, Jun Wang*, Jiang Zinan, Jiarui Huang*, Terence Liu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The porous structure within the cathode material influences the capacity and operating performance of Li-S batteries. Here, we prepared special carbon material using sodium chloride as template/temporary space-holders to design mixture of micro-/meso-/macroporous structure with large surface area through a facile water bath and freeze-drying process. Such modification led to a high sulfur content of 73.2 % with remarkable initial capacity of 1378 mAh g-1 at 0.1 A g‒1, and maintains 48.6% after 100 cycles. Moreover, the Li-S battery displayed superior rate capability of 807 mAh g–1 at 1.0 A g–1. This abundant micro-/meso-/macropores can improve the content of sulfur, relieve the loss of sulfur and exhibit superior cycling performance and rate capability.
Original languageEnglish
Article number115008
Number of pages8
JournalJournal of Electroanalytical Chemistry
Volume882
Early online date13 Jan 2021
Publication statusPublished - 1 Feb 2021

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