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

Sodium-ion batteries hold great promise as next-generation energy storage systems. However, the high instability of the electrode/electrolyte interphase during cycling has seriously hindered the development of SIBs. In particular, an unstable cathode-electrolyte interphase (CEI) leads to successive electrolyte side reactions, transition metal leaching and rapid capacity decay, which tends to be exacerbated under high-voltage conditions. Therefore, constructing dense and stable CEIs are crucial for high-performance SIBs. This work reports localized high-concentration electrolyte by incorporating a highly oxidation-resistant sulfolane solvent with non-solvent diluent 1H, 1H, 5H-octafluoropentyl-1, 1, 2, 2-tetrafluoroethyl ether, which exhibited excellent oxidative stability and was able to form thin, dense and homogeneous CEI. The excellent CEI enabled the O3-type layered oxide cathode NaNi<sub>1/3</sub>Mn<sub>1/3</sub>Fe<sub>1/3</sub>O<sub>2</sub> (NaNMF) to achieve stable cycling, with a capacity retention of 79.48% after 300 cycles at 1 C and 81.15% after 400 cycles at 2 C with a high charging voltage of 4.2 V. In addition, its nonflammable nature enhances the safety of SIBs. This work provides a viable pathway for the application of sulfolane-based electrolytes on SIBs and the design of next-generation high-voltage electrolytes.

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Publication Details

Journal
Nano-Micro Letters
Published
2024-10-18
DOI
https://doi.org/10.1007/s40820-024-01546-7
Citations
33
Primary Topic
Advancements in Battery Materials
Type
article
Field-Weighted Citation Impact
6.89

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article

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

Xiaoping Ouyang, Shenghua Ye, Jie Peng, Xuming Yang et al.
33 citations
Nano-Micro Letters
Advancements in Battery Materials
6.89
article

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

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

Abstract

Sodium-ion batteries hold great promise as next-generation energy storage systems. However, the high instability of the electrode/electrolyte interphase during cycling has seriously hindered the development of SIBs. In particular, an unstable cathode-electrolyte interphase (CEI) leads to successive electrolyte side reactions, transition metal leaching and rapid capacity decay, which tends to be exacerbated under high-voltage conditions. Therefore, constructing dense and stable CEIs are crucial for high-performance SIBs. This work reports localized high-concentration electrolyte by incorporating a highly oxidation-resistant sulfolane solvent with non-solvent diluent 1H, 1H, 5H-octafluoropentyl-1, 1, 2, 2-tetrafluoroethyl ether, which exhibited excellent oxidative stability and was able to form thin, dense and homogeneous CEI. The excellent CEI enabled the O3-type layered oxide cathode NaNi<sub>1/3</sub>Mn<sub>1/3</sub>Fe<sub>1/3</sub>O<sub>2</sub> (NaNMF) to achieve stable cycling, with a capacity retention of 79.48% after 300 cycles at 1 C and 81.15% after 400 cycles at 2 C with a high charging voltage of 4.2 V. In addition, its nonflammable nature enhances the safety of SIBs. This work provides a viable pathway for the application of sulfolane-based electrolytes on SIBs and the design of next-generation high-voltage electrolytes.

Nano-Micro LettersVol. 17(1)
Shenzhen University (CN), Grinm Advanced Materials (China) (CN), Shenzhen Technology University (CN), Xiangtan University (CN), Zhejiang University (CN)
National Natural Science Foundation of China, Shenzhen University, Shenzhen Fundamental Research Program, Tsinghua Shenzhen International Graduate School
Affordable and clean energy
Openalex Percentile: Top 2%
Advancements in Battery Materials
6.89
DOIOpen Access PDFOpenAlex
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