Highly flexible, freestanding tandem sulfur cathodes for foldable Li-S batteries with a high areal capacity

Chi Hao Chang, Sheng Heng Chung, Arumugam Manthiram

Research output: Contribution to journalArticlepeer-review

58 Citations (Scopus)

Abstract

Li-S batteries with a high theoretical capacity are considered as the most promising candidate to satisfy the increasing demand for batteries with a high areal capacity. However, the low sulfur loading (<2 mg cm-2) and poor flexibility of current Li-S batteries limit their application in establishing foldable Li-S batteries with a high areal capacity. To solve this problem, we employ here a free-standing flexible tandem sulfur cathode with a remarkably high sulfur loading to demonstrate foldable, high-areal-capacity Li-S batteries. The design of the tandem cathode readily increases the sulfur loading and effectively retards the migration of polysulfides. Therefore, the Li-S cell employing the tandem cathode exhibits a high initial areal capacity of 12.3 mA h cm-2 with stable cycling stability even with a high sulfur loading of up to 16 mg cm-2. These tandem cathodes are promising for foldable Li-S cells with a high areal capacity and energy density.

Original languageEnglish
Pages (from-to)249-258
Number of pages10
JournalMaterials Horizons
Volume4
Issue number2
DOIs
Publication statusPublished - 2017 Mar 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Process Chemistry and Technology
  • Electrical and Electronic Engineering

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