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Highly electrochemically stable Li2B12H12-Al2O3 nanocomposite electrolyte enabling A 3.8 V room-temperature all-solid-state Li-ion battery

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

  • Chongyang Zhou, Wuhan University of Technology
  • ,
  • Han Sun, Wuhan University of Technology
  • ,
  • Qian Wang, Sichuan University
  • ,
  • Jakob B. Grinderslev
  • Dan Liu, Wuhan University of Technology
  • ,
  • Yigang Yan, Sichuan University
  • ,
  • Torben R. Jensen

Designing solid electrolytes for all-solid-state lithium batteries that can be compatible with high-voltage cathodes is challenging. Here we report that the nanocomposite Li2B12H12-Al2O3 mechano-chemically treated for 120 h achieves an electrochemical stability window up to ∼ 3.8 V owing to the interfacial interaction via B-O bonds and a high lithium ionic conductivity, σ(Li+) = 2.73 × 10−5 S cm−1 at 30 °C. Moreover, this electrolyte shows high compatibility with the lithium metal anode as demonstrated by stable Li plating/stripping for 300 cycles. These electrolyte properties enable the first demonstration of a 3.8 V all-solid-state battery In1.3Li0.3|Li2B12H12-Al2O3 (25 vol%)|LiNi0.8Co0.1Mn0.1O2 (NCM811) operating for 120 cycles with a rate of 0.2 C and at 30 °C, with a reversible specific capacity of 77.5 mAh g−1 and Coulombic efficiency of 99.8 %. The results demonstrate the potential of hydroborates as electrolyte for all-solid-state lithium batteries.

Original languageEnglish
Article number168689
JournalJournal of Alloys and Compounds
Number of pages8
Publication statusPublished - Mar 2023

Bibliographical note

Publisher Copyright:
© 2023

    Research areas

  • All-solid-state battery, Electrochemical stability, Hydroborates, Solid-state electrolyte

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