Micro-Nano Hierarchical Structure From In Situ Functionalized MOFs Enables High-Performance High-Voltage Electrolytes.

Ideal solid-state electrolytes (SSEs) should simultaneously possess excellent ionic conductivity, mechanical strength, electrochemical stability, and cathode compatibility. Here, inspired by the hierarchical architecture of organisms like the lotus leaf, a micro-nano hierarchical composite electrolyte was fabricated via in situ growth of a bifunctional metal-organic framework (F&OH-ZIF-8) on a cellulose acetate (CA) substrate. The micro- and nano-sized F&OH-ZIF-8 crystals have the same composition but exhibit different size-dependent advantages. The micro-sized crystals provide greater structural continuity and mechanical support, whereas the nano-sized crystals offer more accessible polar sites and interfacial regions for Li + coordination and transport. Their cooperative integration suppresses dendrite penetration and stabilizes the electrode/electrolyte interphases while facilitating Li + transport. An outstanding SSE with a room-temperature ionic conductivity of 2.9 × 10 -3 S cm -1, a lithium-ion transference number of 0.61, and a wide electrochemical stability window extending to 5.5 V was obtained by this strategy, resulting in Li||NCM811 full cells achieving a high-capacity retention of 80.9% after 300 cycles at 1C under a high cut-off voltage of 4.6 V. This strategy of transforming existing commercialized ordinary membrane materials into more valuable electrolyte membranes has extremely high practical significance.

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Authors

Xiao Y; Zhang J; Xia X; Yu Y; Wang M; Chen J; Hu W; Yang H

Published

Jan 1, 2026

Journal or venue

Advanced materials (Deerfield Beach, Fla.)

DOI

10.1002/adma.75227

Paper type

journal article

Source

Pubmed