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Preparation and Properties of Polysulfonamide Based Li-S Batteries Separator
Received:December 22, 2023  
DOI：10.11980/j.issn.0254-508X.2024.02.012
Key Words:polysulfonamide  electrostatic repulsion  phase transformation  polysulfide
Fund Project:生物质化学与材料国际联合研究中心（2018GHJD-19）；国家自然科学基金（22078187）；陕西省重点产业创新链项目（2020ZDLGY11-03）。
Author NameAffiliationPostcode
ZHANG Sufeng College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
HE Xinning College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
LI Lei College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
LI Nan College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
WANG Xiaoyi College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
YAN Xueyan College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
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Abstract:A-PSA separator was prepared via phase transformation method using aromatic sulfone （PSA） fiber without loss of its thermal stability （shrinkage of 0 at 200 ℃）， which showed asymmetric pore structure （positive side pore size less than 2 nm）. Alkalization treatment improved electrolyte infiltration （340.5%） and electronegativity of the A-PSA separator. The space barrier and electrostatic shielding cooperative strategy was used to limit the shuttle of polysulfide. The results showed that Li-S batteries equipped with A-PSA separator had a lower electrochemical impedance and higher ionic conductivity （1.23 mS/cm）， with the capacity retention rate （89.1%） was higher than that of PP separator （58.7%） after 100 cycles.
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