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Title: High‐Performance Silicon Anodes Enabled By Nonflammable Localized High‐Concentration Electrolytes

Journal Article · · Advanced Energy Materials
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  1. Energy and Environment Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
  2. Environmental Molecular Sciences Laboratory Pacific Northwest National Laboratory Richland WA 99354 USA
  3. Physical and Computational Sciences Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
  4. Energy and Environment Directorate Pacific Northwest National Laboratory Richland WA 99354 USA, Department of Energy Engineering Hanyang University Seoul 04763 South Korea

Abstract Silicon anodes are regarded as one of the most promising alternatives to graphite for high energy‐density lithium‐ion batteries (LIBs), but their practical applications have been hindered by high volume change, limited cycle life, and safety concerns. In this work, nonflammable localized high‐concentration electrolytes (LHCEs) are developed for Si‐based anodes. The LHCEs enable the Si anodes with significantly enhanced electrochemical performances comparing to conventional carbonate electrolytes with a high content of fluoroethylene carbonate (FEC). The LHCE with only 1.2 wt% FEC can further improve the long‐term cycling stability of Si‐based anodes. When coupled with a LiNi 0.3 Mn 0.3 Co 0.3 O 2 cathode, the full cells using this nonflammable LHCE can maintain >90% capacity after 600 cycles at C/2 rate, demonstrating excellent rate capability and cycling stability at elevated temperatures and high loadings. This work casts new insights in electrolyte development from the perspective of in situ Si/electrolyte interphase protection for high energy‐density LIBs with Si anodes.

Sponsoring Organization:
USDOE
OSTI ID:
1532577
Alternate ID(s):
OSTI ID: 1609131
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 31 Vol. 9; ISSN 1614-6832
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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