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Author

Jung, Yoon Seok
Electrochemical Solid-State Energy Storage Lab
Research Interests
  • Batteries, All-solid-state batteries, solid electrolytes, electrodes, atomic layer deposition,energy storage devices

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

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Title
Interfacial architecture for extra Li+ storage in all-solid-state lithium batteries
Author
Shin, Bum RyongNam, Young JinKim, Jin WookLee, Young-GiJung, Yoon Seok
Keywords
SECONDARY BATTERIES; LICOO2 ELECTRODE; SULFUR BATTERIES; TIS2; LI7LA3ZR2O12; TEMPERATURE; CATHODE; INTERCALATION; CHALLENGES; CONDUCTOR
Issue Date
201407
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v.4, no., pp.1 - 9
Abstract
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-1and 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.
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DOI
http://dx.doi.org/10.1038/srep05572
ISSN
2045-2322
Appears in Collections:
ECHE_Journal Papers
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