Nano-Micro Letters (Oct 2024)

Sulfolane-Based Flame-Retardant Electrolyte for High-Voltage Sodium-Ion Batteries

  • Xuanlong He,
  • Jie Peng,
  • Qingyun Lin,
  • Meng Li,
  • Weibin Chen,
  • Pei Liu,
  • Tao Huang,
  • Zhencheng Huang,
  • Yuying Liu,
  • Jiaojiao Deng,
  • Shenghua Ye,
  • Xuming Yang,
  • Xiangzhong Ren,
  • Xiaoping Ouyang,
  • Jianhong Liu,
  • Biwei Xiao,
  • Jiangtao Hu,
  • Qianling Zhang

DOI
https://doi.org/10.1007/s40820-024-01546-7
Journal volume & issue
Vol. 17, no. 1
pp. 1 – 19

Abstract

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Highlights NaTFSI/SUL:OTE:FEC facilitates the formation of S, N-rich, dense and robust cathode–electrolyte interphase on NaNMF cathode, which improves the cycling stability under high voltage. By utilizing NaTFSI/SUL:OTE:FEC, the Na||NaNMF batteries achieved an impressive retention of 81.15% after 400 cycles at 2 C with the cutoff voltage of 4.2 V. The study offers a reference for the utilization of sulfolane-based electrolytes in sodium-ion batteries (SIBs), while the nonflammability of the NaTFSI/SUL:OTE:FEC enhances the safety of SIBs.

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