title: Interfacial architecture for extra Li⁺ storage in all-solid-state lithium batteries.
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°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.
authors.affiliation: School of Energy and Chemical Engineering, Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Korea.
authors.forename: Bum Ryong
authors.initials: BR
authors.lastname: Shin
authors.affiliation: School of Energy and Chemical Engineering, Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Korea.
authors.forename: Young Jin
authors.initials: YJ
authors.lastname: Nam
authors.affiliation: School of Energy and Chemical Engineering, Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Korea.
authors.forename: Jin Wook
authors.initials: JW
authors.lastname: Kim
authors.affiliation: Power Control Device Research Team, Electronics and Telecommunications Research Institute (ETRI), 218, Gajeongno, Yuseong-gu, Daejeon, 305-700, Korea.
authors.forename: Young-Gi
authors.initials: YG
authors.lastname: Lee
authors.affiliation: School of Energy and Chemical Engineering, Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Korea.
authors.forename: Yoon Seok
authors.initials: YS
authors.lastname: Jung