Vulcanized polymeric cathode material featuring a polyaniline skeleton for high-rate rechargeability and long-cycle stability lithium-sulfur batteries

Chih Hao Tsao, Chun Han Hsu, Jing De Zhou, Chia Wei Chin, Ping Lin Kuo, Chien Hsiang Chang

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

A novel vulcanized polymeric cathode (S@h-P) is prepared by an inexpensive, simple heat treatment of polyaniline with sulfur particles for lithium–sulfur batteries. Conventional lithium–sulfur batteries easily dissolve free polysulfides, which causes a long-term stability issue; therefore, modified separators and polysulfide absorbents are necessary. In this work, sulfur atoms form covalent bonds with aromatic rings of the polyaniline backbone, and so no free polysulfides from the novel cathode exist, as confirmed by XRD and DSC. From CV analysis, the S@h-P only exhibits lower-order polysulfide on the polymer backbone, which affects the charge-discharge profile during the cell test. S@h-P exhibits a satisfactory cyclic stability of 88% capacity retention after 200 cycles, and it offers the excellent rate performance of 55% capacity preservation at the current density of 10 A g−1 compared to 0.1 A g−1. Most interestingly, this polymeric cathode can function in a carbonated system, whereas conventional lithium–sulfur batteries can not. Accordingly, the novel S@h-P cathode can be employed to fabricate ultra-stable and high-performance lithium–sulfur batteries for practical application.

Original languageEnglish
Pages (from-to)111-117
Number of pages7
JournalElectrochimica Acta
Volume276
DOIs
Publication statusPublished - 2018 Jun 20

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

Fingerprint Dive into the research topics of 'Vulcanized polymeric cathode material featuring a polyaniline skeleton for high-rate rechargeability and long-cycle stability lithium-sulfur batteries'. Together they form a unique fingerprint.

Cite this