title: A room-temperature sodium rechargeable battery using an SO2-based nonflammable inorganic liquid catholyte.
abstract: Sodium rechargeable batteries can be excellent alternatives to replace lithium rechargeable ones because of the high abundance and low cost of sodium; however, there is a need to further improve the battery performance, cost-effectiveness, and safety for practical use. Here we demonstrate a new type of room-temperature and high-energy density sodium rechargeable battery using an SO2-based inorganic molten complex catholyte, which showed a discharge capacity of 153 mAh g(-1) based on the mass of catholyte and carbon electrode with an operating voltage of 3 V, good rate capability and excellent cycle performance over 300 cycles. In particular, non-flammability and intrinsic self-regeneration mechanism of the inorganic liquid electrolyte presented here can accelerate the realization of commercialized Na rechargeable battery system with outstanding reliability. Given that high performance and unique properties of Na-SO2 rechargeable battery, it can be another promising candidate for next generation energy storage system.
authors.affiliation: Advanced Batteries Research Center, Korea Electronics Technology Institute, Seongnam, 463-816, Korea.
authors.forename: Goojin
authors.initials: G
authors.lastname: Jeong
authors.affiliation: Department of Energy Engineering, Hanyang University, Seoul, 133-791, Korea.
authors.forename: Hansu
authors.initials: H
authors.lastname: Kim
authors.affiliation: CAE Group, Samsung Advanced Institute of Technology, Yongin, 446-712, Korea.
authors.forename: Hyo Sug
authors.initials: HS
authors.lastname: Lee
authors.affiliation: Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul, 100-715, Korea.
authors.forename: Young-Kyu
authors.initials: YK
authors.lastname: Han
authors.affiliation: 1] Advanced Batteries Research Center, Korea Electronics Technology Institute, Seongnam, 463-816, Korea [2] School of Materials Science and Engineering, Andong National University, Andong, 760-745, Korea.
authors.forename: Jong Hwan
authors.initials: JH
authors.lastname: Park
authors.affiliation: 1] Advanced Batteries Research Center, Korea Electronics Technology Institute, Seongnam, 463-816, Korea [2] Department of Energy Engineering, Hanyang University, Seoul, 133-791, Korea.
authors.forename: Jae Hwan
authors.initials: JH
authors.lastname: Jeon
authors.affiliation: 1] Advanced Batteries Research Center, Korea Electronics Technology Institute, Seongnam, 463-816, Korea [2] Department of Energy Engineering, Hanyang University, Seoul, 133-791, Korea.
authors.forename: Juhye
authors.initials: J
authors.lastname: Song
authors.affiliation: Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul, 100-715, Korea.
authors.forename: Keonjoon
authors.initials: K
authors.lastname: Lee
authors.affiliation: Advanced Batteries Research Center, Korea Electronics Technology Institute, Seongnam, 463-816, Korea.
authors.forename: Taeeun
authors.initials: T
authors.lastname: Yim
authors.affiliation: Advanced Batteries Research Center, Korea Electronics Technology Institute, Seongnam, 463-816, Korea.
authors.forename: Ki Jae
authors.initials: KJ
authors.lastname: Kim
authors.affiliation: School of Materials Science and Engineering, Andong National University, Andong, 760-745, Korea.
authors.forename: Hyukjae
authors.initials: H
authors.lastname: Lee
authors.affiliation: Advanced Batteries Research Center, Korea Electronics Technology Institute, Seongnam, 463-816, Korea.
authors.forename: Young-Jun
authors.initials: YJ
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, Seoul, 151-744, Korea.
authors.forename: Hun-Joon
authors.initials: HJ
authors.lastname: Sohn