DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Kim, Hee-Tak | - |
dc.contributor.advisor | 김희탁 | - |
dc.contributor.author | Chu, Hyunwon | - |
dc.date.accessioned | 2019-09-03T02:43:25Z | - |
dc.date.available | 2019-09-03T02:43:25Z | - |
dc.date.issued | 2019 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=843268&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/266319 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2019.2,[iv, 67 p. :] | - |
dc.description.abstract | Passivation of a sulfur cathode by uncontrolled growth of insulating lithium sulfide imposes a limitation in achieving high sulfur utilization of lithium-sulfur batteries. In electrolytes based on solvents with high Gutmann Donor Number, sulfur utilization can be augmented | - |
dc.description.abstract | however, this approach reveals the drawback of violent lithium metal corrosion. Here we report that particulate lithium sulfide growth can be achieved when using a salt anion with a high donor number such as bromide or triflate. The use of bromide leads to ~95 % sulfur utilization by suppressing electrode passivation. More importantly, the electrolytes with high-donor number salt anions are notably compatible with lithium metal electrodes. The approach enables a high sulfur-loaded cell with areal capacity higher than 4 mA h $cm^{-2}$ and high sulfur utilization (> 90 %). This finding offers a simple but practical strategy to modulate lithium sulfide growth mode, while conserving the stability for high-performance lithium-sulfur batteries. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | Lithium-sulfur battery▼ahigh sulfur utilization▼a$Li_2S$ electrodeposition▼a3D growth▼adonor number▼asalt modification▼asolution-mediated reaction | - |
dc.subject | 리튬 황 전지▼a고황유용 전지▼a전자 기여도▼a리튬 설파이드 도금▼a3차원 성장▼a전해질 염 제어 | - |
dc.title | (The) role of electrolyte anions on $Li_2S$ growth realizing high-performance Li-S batteries | - |
dc.title.alternative | 전해질 염에 따른 리튬 설파이드의 성장 원리 분석을 통한 고성능 리튬 황 전지 개발 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :생명화학공학과, | - |
dc.contributor.alternativeauthor | 추현원 | - |
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