title: Tetrathiafulvalene as a Conductive Film-Making Additive on High-Voltage Cathode.
abstract: Tetrathiafulvalene (TTF) is investigated as a conductive film-making additive on an overlithiated layered oxide (OLO) cathode. When the OLO/graphite cell is cycled at high voltage, carbonate-based electrolyte without the additive decomposes continuously to form a thick and highly resistant surface film on the cathode. In contrast, TTF added into the electrolyte becomes oxidized before the electrolyte solvents, creating a thinner film on the cathode surface. This film inhibits further electrolyte decomposition through cycling and stabilizes the interface between the cathode and the electrolyte. The cells containing the OLO cathode with TTF-added electrolyte afforded enhanced capacity retention and rate capability, making TTF a prospective electrolyte additive for higher energy density lithium-ion cells.
authors.affiliation: Energy Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Co. Ltd. , 130, Samsung-ro, Yeongtong-gu, Suwon-Si, Gyeonggi-do, 16678, South Korea.
authors.forename: Yoon-Sok
authors.identifier: http://orcid.org/0000-0002-7208-6718
authors.initials: YS
authors.lastname: Kang
authors.affiliation: Computer-Aided Engineering Group, Samsung Advanced Institute of Technology, Samsung Electronics Co. Ltd. , 130, Samsung-ro, Yeongtong-gu, Suwon-Si, Gyeonggi-do, 16678, South Korea.
authors.forename: Min Sik
authors.initials: MS
authors.lastname: Park
authors.affiliation: Energy Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Co. Ltd. , 130, Samsung-ro, Yeongtong-gu, Suwon-Si, Gyeonggi-do, 16678, South Korea.
authors.forename: Insun
authors.initials: I
authors.lastname: Park
authors.affiliation: Energy Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Co. Ltd. , 130, Samsung-ro, Yeongtong-gu, Suwon-Si, Gyeonggi-do, 16678, South Korea.
authors.forename: Dong Young
authors.initials: DY
authors.lastname: Kim
authors.affiliation: Energy Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Co. Ltd. , 130, Samsung-ro, Yeongtong-gu, Suwon-Si, Gyeonggi-do, 16678, South Korea.
authors.forename: Jun-Ho
authors.initials: JH
authors.lastname: Park
authors.affiliation: Energy Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Co. Ltd. , 130, Samsung-ro, Yeongtong-gu, Suwon-Si, Gyeonggi-do, 16678, South Korea.
authors.forename: Kwangjin
authors.initials: K
authors.lastname: Park
authors.affiliation: Energy Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Co. Ltd. , 130, Samsung-ro, Yeongtong-gu, Suwon-Si, Gyeonggi-do, 16678, South Korea.
authors.forename: Meiten
authors.initials: M
authors.lastname: Koh
authors.affiliation: Energy Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Co. Ltd. , 130, Samsung-ro, Yeongtong-gu, Suwon-Si, Gyeonggi-do, 16678, South Korea.
authors.forename: Seok-Gwang
authors.initials: SG
authors.lastname: Doo
keywords: cathode passivation; electrolyte additive; lithium-ion battery; overlithiated layered oxide; tetrathiafulvalene