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

Bum Ryong Shin, Young Jin Nam, Jin Wook Kim, Young Gi Lee, Yoon Seok Jung

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

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.

Original languageEnglish
Article number5572
JournalScientific reports
Volume4
DOIs
Publication statusPublished - 2014 Jul 8

Bibliographical note

Funding Information:
This work was supported by the Energy Efficiency & Resources Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Trade, Industry & Energy (No. 20112010100150), by the BK21 Plus Program (META-material-based Energy Harvest and Storage Technologies, 10Z20130011057) funded by the Ministry of Education (MOE, Korea) and National Research Foundation of Korea (NRF), and by the Future Strategic Fund (1.130019.01) of UNIST (Ulsan National Institute of Science and Technology).

All Science Journal Classification (ASJC) codes

  • General

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