铝酸锂纳米棒改性固态电解质的制备及电化学性能研究

doi:10.19964/j.issn.1006-4990.2023-0151

Abstract

Abstract:

The low ionic conductivity and narrow electrochemical stability window of solid electrolyte are the key problems restricting their commercial applications.A polypropylene carbonate-based organic/inorganic composite solid electrolyte filled with lithium aluminate nanorods（LAO-CSE） was fabricated，the microstructure and electrochemical properties of LAO nanorods and composite films were characterized by scanning electron microscope，transmission electron microscope and electrochemical workstation，respectively.The results showed that the ionic conductivity of the composite solid electrolyte membrane could be increased to 5.0×10^-4S/cm after adding LAO nanorods，and the electrochemical stability window was greater than 4.8 V.LAO-CSE exhibited excellent room-temperature electrochemical performance when it was applied to solid-state lithium-ion batteries.The NCM622/LAO-CSE/Li solid-state battery filled with 8%（mass fraction） LAO exhibited a first-cycle specific discharge capacity of 180 mA·h/g，and a capacity retention of 97.3% after 100 cycles at 0.5C.The enhanced effect of LAO nanorods could be attributed to the fact that the rod-like fillers provided a more continuous Li-ion transport path compared with nanoparticles.These LAO-CSE composites were expected to be widely used in high-voltage solid-state lithium batteries.

Key words: lithium aluminate nanorods, solid electrolyte, electrochemistry, ion conductivity

CLC Number:

TQ152

KANG Le, JING Maoxiang, LI Donghong, HU Xinyu, JIA Chunyan. Study on preparation and electrochemical performance of lithium aluminate nanorods modified solid electrolyte[J]. Inorganic Chemicals Industry, 2023, 55(8): 65-70.

Figures/Tables 11

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Study on preparation and electrochemical performance of lithium aluminate nanorods modified solid electrolyte

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