摘要
Lithium–sulfur(Li–S)batteries promise high-energy-density potential to exceed the commercialized lithiumion batteries but suffer from limited cycling lifespan due to the side reactions between lithium polysulfides(LiPSs)and Li metal anodes.Herein,a three-way electrolyte with ternary solvents is proposed to enable high-energy-density and long-cycling Li–S pouch cells.Concretely,ternary solvents composed of 1,2-dimethoxyethane,di-isopropyl sulfide,and 1,3,5-trioxane are employed to guarantee smooth cathode kinetics,inhibit the parasitic reactions,and construct a robust solid electrolyte interphase,respectively.The cycling lifespan of Li–S coin cells with 50μm Li anodes and 4.0 mg cm^(−2) sulfur cathodes is prolonged from88 to 222 cycles using the three-way electrolyte.Nano-heterogeneous solvation structure of LiPSs and organic-rich solid electrolyte interphase are identified to improve the cycling stability of Li metal anodes.Consequently,a 3.0 Ah-level Li–S pouch cell with the three-way electrolyte realizes a high energy density of 405 Wh kg^(−1) and undergoes 27 cycles.Thiswork affords a three-way electrolyte recipe for suppressing the side reactions of LiPSs and inspires rational electrolyte design for practical high-energy-density and long-cycling Li–S batteries.
出处
《SusMat》
SCIE
EI
2024年第2期1-12,共12页
可持续发展材料（英文）
基金
Beijing Municipal Natural Science Foundation,Grant/Award Number:Z200011
National Natural Science Foundation of China,Grant/Award Numbers:22061132002,22379013,T2322015
Seed Fund of Shanxi Research Institute for Clean Energy,Grant/Award Number:SXKYJF015
S&T Program of Hebei Province,Grant/Award Number:22344402D
Tsinghua-Jiangyin Innovation Special Fund(TJISF)
Tsinghua-Toyota Joint Research Fund
Institute of Strategic Research,Huawei Technologies Co.,Ltd.
Ordos-Tsinghua Innovative&Collaborative Research Program in Carbon Neutrality
National Key Research and Development Program of China,Grant/Award Numbers:2021YFB2500300,2021YFB2400300。
