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A New Perspective on Li–SO 2 Batteries for Rechargeable Systems
Author(s) -
Lim HeeDae,
Park Hyeokjun,
Kim Hyungsub,
Kim Jinsoo,
Lee Byungju,
Bae Youngjoon,
Gwon Hyeokjo,
Kang Kisuk
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201504306
Subject(s) - battery (electricity) , organic radical battery , polarization (electrochemistry) , energy density , materials science , energy storage , redox , catalysis , electrochemistry , nanotechnology , engineering physics , chemistry , electrode , engineering , physics , thermodynamics , organic chemistry , metallurgy , power (physics)
Primary Li–SO 2 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 Li 2 S 2 O 4 , the major discharge product of Li–SO 2 battery, is possible with a remarkably smaller charging polarization than that of a Li–O 2 battery without the use of catalysts. The rechargeable Li–SO 2 battery can deliver approximately 5400 mAh g −1 at 3.1 V, which is slightly higher than the performance of a Li–O 2 battery. In addition, the Li–SO 2 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.