Revealing the specific role of sulfide and nano-alumina in composite solid-state electrolytes for performance-reinforced ether-nitrile copolymers  

作　　者：Haoyang Yuan Changhao Tian Mengyuan Song Wenjun Lin Tao Huang Aishui Yu 

机构地区：[1]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 [2]Laboratory of Advanced Materials,Fudan University,Shanghai 200438,China

出　　处：《Journal of Energy Chemistry》2024年第4期628-636,共9页能源化学（英文版）

基　　金：supported by the Science and Technology Commission of Shanghai Municipality(No.19DZ2270100),China。

摘　　要：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 cathode 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 capacity due to the low ion conductivity of the passivation layer during cycling.The capacity retention after 50cycles 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 m A 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.

关 键 词：Composite solid-state electrolytes Lithium metal anode Dual fillers Interfacial ionic conduction Inert nano-alumina 

分 类 号：O646.1[理学—物理化学] TM912[理学—化学]