首页|Revealing the specific role of sulfide and nano-alumina in composite solid-state electrolytes for performance-reinforced ether-nitrile copolymers
Revealing the specific role of sulfide and nano-alumina in composite solid-state electrolytes for performance-reinforced ether-nitrile copolymers
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Composite solid-state electrolytes represent a critical pathway that balances the interface compatibility and lithium-ion conductivity in all-solid-state batteries.The quest for stable and highly ion-conductive combinations between polymers and fillers is vital,but blind attempts are often made due to a lack of understanding of the mechanisms involved in the interaction between polymers and fillers.Herein,we employ in-situ polymerization to prepare a polymer based on an ether-nitrile copolymer with high cath-ode stability as the.foundation and discuss the performance enhancement mechanisms of argyrodite and nano-alumina.With 1％content of sulfide interacting with the polymer at the two-phase interface,the local enhancement of lithium-ion migration capability can be achieved,avoiding the reduction in capac-ity due to the low ion conductivity of the passivation layer during cycling.The capacity retention after 50 cycles at 0.5 C increases from 83.5％to 94.4％.Nano-alumina,through anchoring the anions and interface inhibition functions,eventually poses an initial discharge capacity of 136.8 mA h g-1 at 0.5 C and extends the cycling time to 1000 h without short-circuiting in lithium metal batteries.Through the combined action of dual fillers on the composite solid-state electrolyte,promising insights are provided for future material design.
Composite solid-state electrolytesLithium metal anodeDual fillersInterfacial ionic conductionInert nano-alumina
Department of Chemistry,Collaborative Innovation Center of Chemistry for Energy Materials,Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Institute of New Energy,Fudan University,Shanghai 200438,China
Laboratory of Advanced Materials,Fudan University,Shanghai 200438,China
Science and Technology Commission of Shanghai Municipality China
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