A New Perspective on Li–SO2 Batteries for Rechargeable Systems1. (3rd July 2015)

• Record Type: Journal Article
• Authors: Lim, Hee‐Dae; Park, Hyeokjun; Kim, Hyungsub; Kim, Jinsoo; Lee, Byungju; Bae, Youngjoon; Gwon, Hyeokjo; Kang, Kisuk
• Is Part Of: Angewandte Chemie. Volume 127:Number 33(2015)
• Page Start: 9799
• Page End: 9803
• Publication Date: 2015-07-03
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201504306
• Languages: English
• ISSNs: 0044-8249

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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.</p> </abstract>