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Disorder-driven sintering-free garnet-type solid electrolytes
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DOI：10.1038/s41467-025-58108-7.png)
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Abstract
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Oxide ceramic electrolytes for realization of high-energy lithium metal batteries typically require high-temperature processes to achieve the desired phase formation and inter-particle sintering. However, such high-temperature processing can lead to compositional changes or mechanical deformation, compromising material reliability. Here, we introduce a disorder-driven, sintering-free approach to synthesize garnet-type solid electrolyte via the creation of an amorphous matrix followed by a single-step mild heat-treatment. The softened mechanical property (yield pressure, P-y = 359.8 MPa) of disordered base materials enables the facile formation of a dense amorphous matrix and the preserving of inter-particle connectivity during crystallization. The formation of the cubic-phase garnet is triggered at a lowered temperature of 350 degrees C, achieving a Li(+ )ionic conductivity of 1.8 x 10(-4) S/cm at 25 degrees C through a single-step mild heat treatment at 500 degrees C. The disorder-driven garnet solid electrolyte exhibits electrochemical performance comparable to conventional garnet solid electrolyte sintered at >1100 degrees C. These findings will promote the fabrication of uniform, thin, and wide solid electrolyte membranes, which is a significant hurdle in the commercialization of oxide-based lithium metal batteries, and demonstrate the untapped capabilities of garnet-type oxide solid electrolytes.
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15.7
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9.4W
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91.2W
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ACS ENERGY LETTERSOAAI
ACS ENERGY LETTERSIF18.2
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