Significant
Reduction in Interface Resistance and
Super-Enhanced Performance of Lithium-Metal Battery by In Situ Construction
of Poly(vinylidene fluoride)-Based Solid-State Membrane with Dual
Ceramic Fillers
posted on 2021-08-13, 09:14authored bySajid
Hussain Siyal, Syed Shoaib Ahmad Shah, Tayyaba Najam, Muhammad Sufyan Javed, Muhammad Imran, Jin-Le Lan
Due to the degradation of lithium-metal
anode, lithium dendritic
growth and other challenging problems like interface resistance among
electrolyte and electrode may damage the actual performance of lithium-metal
batteries (LMB). Recently, ceramic nanofillers Li1.3Al0.3Ti1.7P(O4)3 (LATP) and
Li0.33La0.557TiO3 (LLTO) seem to
be suitable solid-state electrolytes for lithium metallic solid-state
batteries with outstanding energy densities and highly safer energy
storage devices. Herein, the solid-state electrolytic materials are
composed of a fast ion-conducting solid-state LATP, LLTO, and optimized
amount of adequate polarized poly(vinylidene fluoride) (PVDF) electrolyte
with lithium salt (LiClO4) to fabricate the dual semi-solid-state
polymer electrolyte (DSPE) membrane. The prepared membrane provides
a promising solution for battery safety and the most challenging problems
of interface resistance. The proposed DSPE membrane is investigated
via analytical techniques; testing results showed that the DSPE membrane
possesses excellent electrochemical performance, including suitable
Li-transference numbers and improved ionic conductivities with enhanced
stability. Furthermore, the DSPE membrane is beneficial to resist
the growth of Li dendrites effectively. The symmetrical cell Li//DSPE//Li
exhibits excellent stability at a high current density of 1 mA/cm2 over 1000 h, and the membrane sustains long-cycle performance
with a high retention of 95% after 100 cycles. The designed DSPE membrane
opens a path of fabricating a safe electrolyte membrane for elevated
temperature metal-ion battery applications.