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Creep-type all-solid-state cathode achieving long life
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DOI：10.1038/s41467-024-48174-8.png)
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摘要
En 中文
Electrochemical-mechanical coupling poses enormous challenges to the interfacial and structural stability but create new opportunities to design innovative all-solid-state batteries from scratch. Relying on the solid-solid constraint in the space-limited domain structure, we propose to exploit the lithiation-induced stress to drive the active materials creep, thereby improving the structural integrity. For demonstration, we fabricate the creep-type all-solid-state cathode using creepable Se material and an all-in-one rigid ionic/electronic conducting Mo6Se8 framework. As indicated by the in-situ experiment and numerical simulation, this cathode presents unique capabilities in improving interparticle contact and avoiding particle fracture, leading to its superior electrochemical performance, including a superior long-cycle life of more than 3000 cycles at 0.5 C and a high volumetric energy density of 2460 Wh/L at the cathode level. We believe this innovative strategy to utilize mechanics to boost the electrochemical performance could shed light on the future design of all-solid-state batteries for practical applications. Electrochemical-mechanical issues bring challenges but create new opportunities to design innovative all-solid-state batteries. Here, the authors propose to use the (de)lithiation-stress-creep synergistic time-dependent evolution to boost the electrochemical performance of all-solid-state batteries.
Keyword:
MECHANICAL-PROPERTIES
ION BATTERIES
MELTING-POINT
STRAIN-RATE
LITHIUM
PRESSURE
METALS
ROOM
FES
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期刊
IF:
15.7
论文数:
9.3W
被引数:
91.2W
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