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Interfacial architecture for extra Li? storage in all-solid-state lithium batteries.

ABSTRACT: The performance of nanocomposite electrodes prepared by controlled ball-milling of TiS? and a Li?S-P?S? solid electrolyte (SE) for all-solid-state lithium batteries is investigated, focusing on the evolution of the microstructure. Compared to the manually mixed electrodes, the ball-milled electrodes exhibit abnormally increased first-charge capacities of 416 mA h g(-1) and 837 mA h g(-1) in the voltage ranges 1.5-3.0 V and 1.0-3.0 V, respectively, at 50 mA g(-1) and 30°C. The ball-milled electrodes also show excellent capacity retention of 95% in the 1.5-3.0 V range after 60 cycles as compared to the manually mixed electrodes. More importantly, a variety of characterization techniques show that the origin of the extra Li(+) storage is associated with an amorphous Li-Ti-P-S phase formed during the controlled ball-milling process.

SUBMITTER: Shin BR

PROVIDER: S-EPMC4085631 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature

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Interfacial architecture for extra Li⁺ storage in all-solid-state lithium batteries.

Shin Bum Ryong BR Nam Young Jin YJ Kim Jin Wook JW Lee Young-Gi YG Jung Yoon Seok YS

Scientific reports 20140708

The performance of nanocomposite electrodes prepared by controlled ball-milling of TiS₂ and a Li₂S-P₂S₅ solid electrolyte (SE) for all-solid-state lithium batteries is investigated, focusing on the evolution of the microstructure. Compared to the manually mixed electrodes, the ball-milled electrodes exhibit abnormally increased first-charge capacities of 416 mA h g(-1) and 837 mA h g(-1) in the voltage ranges 1.5-3.0 V and 1.0-3.0 V, respectively, at 50 mA g(-1) and 30°C. The ball-milled electro ...[more]

PMID: 25001392

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