| 학회 |
한국공업화학회 |
| 학술대회 |
2020년 가을 (10/28 ~ 10/30, 광주 김대중컨벤션센터(Kimdaejung Convention Center)) |
| 권호 |
24권 1호 |
| 발표분야 |
[전기화학] 에너지분야 전기화학 시스템 연구 및 분석 기술 동향 |
| 제목 |
Ti 치환을 통한, 고에너지/고출력 P2 type Na0.67Co1-xTixO2 소듐 이차 전지 양극 |
| 초록 |
This presentation includes the electrochemical performance improvement of the cathode material, Na0.67Co1-xTixO2 having P2 type crystalline structure to control Na/vacancy ordering for mitigating the Na ion diffusion in the solid matrix as well as for extending the de-sodiation range to 4.4 & 4.5 V. The proposed material having Ti doping relieves electrochemical Na+/vacancy ordering behavior from Na0.67Co1-xO2 having a capacity loss at high potential because of irreversible phase. 10 % Ti-doping highly advances the cycleability by 115 mAh g-1 at the 100th cycle, as well as the rate capability by reaching 108 mAh g-1 at a 1000 mA g-1. The diffusion kinetics and phases from the cathodes are investigated by a combination of TEM, in-situ XRD, and electrochemical methods. |
| 저자 |
강석문1, 김애화1, 문준영2, 성영은1
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| 소속 |
1서울대, 2인천대 |
| 키워드 |
고출력 소듐 전지; Ti 도핑; vancancy ordering
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| E-Mail |
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