Lithium sulfur (Li-S) batteries has been investigated as the ideal candidates for future high-density energy storage system with the advantages of abundant reserves, high energy density and competitive cost. The...
Solid-state
electrolytes represent a new trend for designing safe
lithium batteries. However, the application is still plagued by the
relatively low ionic conductivity. Herein, a Li6.4La3Zr1.4Ta0.6O12/poly(vinylene
carbonate) (LLZTO/PVCA) hybrid is fabricated by an in situ polymerization strategy. Benefiting from the integrated interfaces
and extended lithium-ion transfer channels, a superior ionic conductivity
of up to 7.8 × 10–5 S cm–1 is achieved at room temperature. Meanwhile, it presents a wide electrochemical
window over 4.5 V (vs Li+/Li), and the
lithium-ion transference number is 0.556. Additionally, the LLZTO/PVCA
hybrid also exhibits excellent flexibility for buffering volume fluctuation
during cycling. The solid-state LFP|LLZTO/PVCA|Li battery exhibits
an initial capacity of 157 mA h g–1, 83% retention
over 120 cycles, and an average Coulombic efficiency over 99% at 0.1
C, demonstrating good application potential.
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