Abstract
Solid state lithium-ion batteries(SLIBs)have been considered as one of the most promising sustainable next-generation technologies for energy storage.However,the poor interfacial compatibility and low ion conductivity of solid electrolytes still remain a major challenge for SLIBs.Herein,a free-standing flexible solid polymer LA-PAM-PEO electrolyte is constructed through the electrospinning technology featuring with high Li+conductivity(6.1 x 10-4 S cm-1),strong mechanical strength and high Li+migration num-ber(0.32),which breaks the restriction between ionic conductivity and mechanical strength in polymer solid electrolyte.The cross-linking between LA,PAM and PEO is verified to decrease the crystalline of PEO,thus increasing the Li+conductivity.Moreover,benefiting from the 3D network composed of in-terconnected nanofibers and the covalent bonds between LA,PAM and PEO,the mechanical strength of LA-PAM-PEO SPE was also effectively improved.The LA-PAM-PEO SPE also delivers a high electrochemi-cal window(4.95 V),and low interface resistance(243.8 Ω).As a result,the Li/Li symmetrical cell with the LA-PAM-PEO displayed outstanding stability after 1000 h with the uniform Li deposition on the in-terface of Li electrode,in sharp contrast to the PEO SPE.In addition,the Li/LA-PAM-PEO SPE/LFP displays a discharge capacity of 135 mA h g-1 after 1000 cycles at the rate of 1 C,with a capacity retention of 93.5％.The proposed LA-PAM-PEO SPE thus opens new possibilities for the fabrication and engineering of solid-state Li-ion batteries.
基金项目
National Natural Science Foundation of China(52072193)
National Natural Science Foundation of China(U22A20131)
Shandong Provincial Natural Science Foundation(ZR2021JQ16)
Shandong Provincial Natural Science Foundation(ZR2023YQ040)
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials(KF2217)
Shandong Provincial College Students'Innovation and Entrepreneurship Training Program(S202211065062)
NETL
NSTL
万方数据