title: A New Perspective on Li-SO2 Batteries for Rechargeable Systems.
abstract: Primary Li-SO2 batteries offer a high energy density in a wide operating temperature range with exceptionally long shelf life and have thus been frequently used in military and aerospace applications. Although these batteries have never been demonstrated as a rechargeable system, herein, we show that the reversible formation of Li2S2O4, the major discharge product of Li-SO2 battery, is possible with a remarkably smaller charging polarization than that of a Li-O2 battery without the use of catalysts. The rechargeable Li-SO2 battery can deliver approximately 5400 mAh g(-1) at 3.1 V, which is slightly higher than the performance of a Li-O2 battery. In addition, the Li-SO2 battery can be operated with the aid of a redox mediator, exhibiting an overall polarization of less than 0.3 V, which results in one of the highest energy efficiencies achieved for Li-gas battery systems.
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, Seoul 151-742 (Republic of Korea).
authors.forename: Hee-Dae
authors.initials: HD
authors.lastname: Lim
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, Seoul 151-742 (Republic of Korea).
authors.forename: Hyeokjun
authors.initials: H
authors.lastname: Park
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, Seoul 151-742 (Republic of Korea).
authors.forename: Hyungsub
authors.initials: H
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, Seoul 151-742 (Republic of Korea).
authors.forename: Jinsoo
authors.initials: J
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, Seoul 151-742 (Republic of Korea).
authors.forename: Byungju
authors.initials: B
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, Seoul 151-742 (Republic of Korea).
authors.forename: Youngjoon
authors.initials: Y
authors.lastname: Bae
authors.affiliation: Department of Materials Science and Engineering, KAIST, Daejeon 305-701 (Republic of Korea).
authors.forename: Hyeokjo
authors.initials: H
authors.lastname: Gwon
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, Seoul 151-742 (Republic of Korea). matlgen1@snu.ac.kr.
authors.forename: Kisuk
authors.initials: K
authors.lastname: Kang
keywords: Li-SO2 battery; catalysts; electrochemistry; rechargeability; sulfur dioxide