A Heterogeneous Quasi-solid-State Hybrid Electrolyte Constructed from Electrospun Nanofibers Enables Robust Electrode/Electrolyte Interfaces for Stable Lithium Metal Batteries
Manxi Wang, Shiwen Lv, Manxian Li, Xuan Li, Chuanping Li, Zulin Li, Xiaochuan Chen, Junxiong Wu, Xiaoyan Li, Yuming Chen, Qinghua Chen
Advanced Fiber Materials ›› 2024, Vol. 6 ›› Issue (3) : 727-738.
A Heterogeneous Quasi-solid-State Hybrid Electrolyte Constructed from Electrospun Nanofibers Enables Robust Electrode/Electrolyte Interfaces for Stable Lithium Metal Batteries
Quasi-solid-state electrolytes that possess high ionic conductivity, excellent interface stability, and low interfacial resistance, are required for practical solid-state batteries. Herein, a heterogeneous quasi-solid-state hybrid electrolyte (QSHE) with a robust lithium-ion transport layer composed of Li1+xAlxTi2−x(PO4)3 (LATP) nanoparticles (NPs) at the anode/electrolyte interface was fabricated using electrospun nanofibers as a skeleton via a facile in situ polymerization approach. The QSHE exhibits a high ionic conductivity (0.98 mS cm−1), a wide electrochemical window (4.76 V vs. Li/Li+), and favorable compatibility with lithium metal (maintaining stability over 2000 h in a symmetrical cell) at room temperature. When coupled with a Li|LiFePO4 battery, the QSHE enables the battery to retain 95.4% of its capacity after 300 cycles at 2 C. Moreover, the atomic force microscopy verifies the high Young’s modulus of the LATP-dominated bottom layer, while numerical simulation validates the effective distribution of lithium ions at the interface facilitated by LATP NPs, hence contributing to dendrite-free lithium plating/stripping morphology. This straightforward strategy could pave the way for the development of high-performance and interfacially stable lithium metal batteries.
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