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Interfacial Architecture for Extra Li+ Storage in All-Solid-State Lithium Batteries

Title
Interfacial Architecture for Extra Li+ Storage in All-Solid-State Lithium Batteries
Author
정윤석
Keywords
SECONDARY BATTERIES; LICOO2 ELECTRODE; SULFUR BATTERIES; TIS2; LI7LA3ZR2O12; TEMPERATURE; CATHODE; INTERCALATION; CHALLENGES; CONDUCTOR
Issue Date
2014-07
Publisher
Nature Publishing Group
Citation
Scientific Reports, 2014, 4, P.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(-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 degrees 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.
URI
http://www.nature.com/articles/srep05572http://hdl.handle.net/20.500.11754/53503
ISSN
2045-2322
DOI
10.1038/srep05572
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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