Preparation and Properties of Polysulfonamide Based Li-S Batteries Separator
A-PSA separator was prepared via phase transformation method using aromatic sulfone(PSA)fiber without loss of its thermal sta-bility(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 coop-erative 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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