LAUSR

Metal-organic frameworks (MOFs), as a promising rechargeable electrochemical energy storage material has emerged in the fields of solid-state lithium battery. However, low ionic conductivity and high interfacial impedance still severely hamper the application of MOFs-based solid-state electrolytes (SSE). Herein, a novel hierarchical porous H-ZIF-8 solid-state electrolyte (SSE) material has been harvested through the in-situ growth of zinc nitrate hydroxide nanosheets, expressing excellent ion conductivity of 1.04×10-3 S cm-1 and Li+ transference number of 0.71. Moreover, the morphology and structure of H-ZIF-8 was further optimized to obtain a composite H-ZIF-8/HNT by decorating halloysite nanotubes (HNT). Notably, functionalized H-ZIF-8/HNT as an electrolyte presents obvious enhancement on electrochemical properties: higher ionic conductivity of 7.74×10-3 S cm-1 , better single-ion transmittability (tLi + = 0.84), good interfacial compatibility as well as excellent rate performance. More importantly, the Li/LiFePO4 battery equipped with H-ZIF-8/HNT SSE owns efficient lithium dendrite suppression and up to 84% capacity retention (104.16 mA h g-1 ) after 200 times galvanostatic charge/discharge cycles. This work enriches the solid-state lithium-ion composite electrolyte materials, opening an entirely new way for enhancing electrochemical performance. This article is protected by copyright. All rights reserved.