| 학회 |
한국공업화학회 |
| 학술대회 |
2016년 봄 (05/02 ~ 05/04, 여수 엑스포 컨벤션) |
| 권호 |
20권 1호 |
| 발표분야 |
무기재료_포스터 |
| 제목 |
Dissolution and ionization of sodium superoxide (NaO2) in sodium-oxygen batteries |
| 초록 |
We demonstrate the interplay of the diverse reactions in Na–O2 batteries involving a series of electrochemical and chemical reactions as a function of time. By systematically controlling the operating conditions, we observe that the galvanostatic charge/discharge profiles are sensitively affected by the conditions and durations of electrochemical operations. It is revealed that the electrochemically formed NaO2 is unstable and degrades into Na2O2·2H2O in the absence of the applied current. The spontaneous dissolution and ionization of NaO2 liberates the free O2- in the electrolyte and promotes side reactions involving the formation of Na2O2·2H2O. Based on these observations, we proposed reaction mechanisms of Na–O2 batteries under various operating conditions. This report is the first to reveal the relationships among the different discharge products observed in Na–O2 batteries. |
| 저자 |
박혁준1, 김진수2, 이병주1, 성원모1, 임희대1, 강기석1
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| 소속 |
1서울대, 2현대자동차 |
| 키워드 |
Energy storage; Metal-oxygen batteries; superoxide; discharge product; dissolution
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| E-Mail |
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