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An electrolyte additive for the improved high voltage performance of LiNiMnO (LNMO) cathodes in Li-ion batteries

Journal of Materials Chemistry A, ISSN: 2050-7496, Vol: 11, Issue: 14, Page: 7670-7678
2023
  • 20
    Citations
  • 0
    Usage
  • 31
    Captures
  • 1
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    20
    • Citation Indexes
      20
  • Captures
    31
  • Mentions
    1
    • News Mentions
      1
      • News
        1

Most Recent News

Findings on Electronics Reported by Investigators at University of Fribourg [An Electrolyte Additive for the Improved High Voltage Performance of Lini0.5mn1.5o4 (Lnmo) Cathodes In Li-ion Batteries]

2023 APR 24 (NewsRx) -- By a News Reporter-Staff News Editor at Electronics Daily -- Investigators publish new report on Electronics. According to news reporting

Article Description

High-voltage cathode materials are important for the implementation of high-energy-density Li-ion batteries. However, with increasing cut-off voltages, interfacial instabilities between electrodes and the electrolyte limit their commercial development. This study addresses this issue by proposing a new electrolyte additive, (3-aminopropyl)triethoxysilane (APTS). APTS stabilises the interface between the LiNiMnO (LNMO) cathode and the electrolyte in LNMO‖Li half-cells due to its multifunctional character. The amino groups in APTS facilitate the formation of a robust protective cathode layer. Its silane groups improve layer stability by neutralising the electrolyte's detrimental hydrogen fluoride and water. Electrochemical measurements reveal that the addition of 0.5 wt% APTS significantly improves the long-term cycling stability of LNMO‖Li half-cells at room temperature and 55 °C. APTS-addition to the electrolyte delivers excellent capacity retention of 92% after 350 cycles at room temperature and 71% after 300 cycles at 55 °C (1C) contrasting with the much lower performances of the additive-free electrolyte. The addition of a 0.5 wt% (3-glycidyloxypropyl)trimethoxysilane (GLYMO) additive, which contains only the siloxane group, but lacks the amine group, displayed a capacity retention of 73% after 350 cycles at room temperature but degraded significantly upon cycling at 55 °C.

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