Toward Enhancing Low Temperature Performances of Lithium-Ion Transport for Metal–Organic Framework-Based Solid-State Electrolyte: Nanostructure Engineering or Crystal Morphology Controlling
Xin Wang, Sheng Jin, Lu Shi, Nan Zhang, Jia Guo, Dianqu Zhang, Zhiliang Liu
Abstract
Metal–organic frameworks (MOFs) have emerged as attractive candidates for Li + conducting electrolytes due to their regular channels and controllable morphology, making their presence prominent in the field of solid-state lithium batteries. However, most MOF-based electrolytes are researched at or near room temperature, which poses a challenge to their practical applications at low temperatures. Herein, a thin layer flower-shaped 2D Cu-MOF (CuBDC-10)-based solid-state electrolytes (SSEs) for lithium-ion batteries (LIBs) are developed for facilitating Li + transport at lower temperatures, which achieve an ion conductivity of 10 –4 S cm –1 at −30 °C. The CuBDC-10-based SSE exhibits outstanding ionic conductivity over a wide temperature range of −40 to 100 °C (0.073–3.68 × 10 –3 S cm –1 ). This work provides strategies for exploring MOF-based SSEs with high ionic transport performances at low temperatures.