Stable Li Metal Anode by a Hybrid Lithium Polysulfidophosphate/Polymer Cross-Linking Film

Yuming Zhao, Guoxing Li, Yue Gao, Daiwei Wang, Qingquan Huang, Donghai Wang

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

The practical application of rechargeable lithium (Li) metal batteries has long been hindered by the unstable Li metal anode with problems like Li dendrite growth, low Coulombic efficiency (CE), and short cycle life. Here, we demonstrate a multifunctional sulfur-containing hybrid Li polysulfidophosphate and poly(2-chloroethyl acrylate) cross-linking film that can provide effective protection for Li metal anode. This film can facilitate Li metal anode generating a stable organic/inorganic hybrid solid electrolyte interphase (SEI) layer containing multiple components such as polymer-tethered organo(poly)sulfide, inorganic Li polysulfidophosphate, Li sulfides, and Li salts. Thanks to this hybrid robust SEI layer, dendrite-free Li deposition and stable cycling of Li metal anode can be achieved (e.g., CE > 98.7% over 950 cycles). We demonstrated this Li protection technique enables both the protected Li metal anode and Li-metal-free anode cycling with significantly improved CEs and stability in full cells using LiFePO4 (a2.4 mAh/cm2) cathode.

Original languageEnglish (US)
Pages (from-to)1271-1278
Number of pages8
JournalACS Energy Letters
Volume4
Issue number6
DOIs
StatePublished - Jun 14 2019

All Science Journal Classification (ASJC) codes

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry

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