A new perspective on Li-SO2 batteries for rechargeable systems
- A new perspective on Li-SO2 batteries for rechargeable systems
- 임희대; 박혁준; 김형섭; 김진수; 이병주; 배영준; 권혁조; 강기석
- Issue Date
- Angewandte Chemie international edition
- VOL 54, NO 33-9667
- 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.
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