Journal
ACS APPLIED ENERGY MATERIALS
Volume 4, Issue 9, Pages 9368-9375Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.1c01570
Keywords
in situ polymerization; Li6.4La3Zr1.4Ta0.6O12/poly(vinylene carbonate); hybrid solid-state electrolyte; high ionic conductivity; lithium batteries
Funding
- NSF from Shanghai Government [18JC1412900]
- Shanghai Sailing Program [19YF1436600]
- Shanghai Engineering Research Center of Green Energy Chemical Engineering
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Solid-state electrolytes are crucial for designing safe lithium batteries, but currently face challenges with low ionic conductivity. A hybrid of LLZTO/PVCA has been developed to improve conductivity, leading to enhanced electrochemical performance and cycling stability, demonstrating promising application potential.
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 x 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 vertical bar LLZTO/PVCALi 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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