Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1126/science.aas9343 |
A high-energy-density lithium-oxygen battery based on a reversible four-electron conversion to lithium oxide | |
Xia, C.; Kwok, C. Y.; Nazar, L. F.1 | |
2018-08-24 | |
发表期刊 | SCIENCE |
ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2018 |
卷号 | 361期号:6404页码:777-781 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | Lithium-oxygen (Li-O-2) batteries have attracted much attention owing to the high theoretical energy density afforded by the two-electron reduction of O-2 to lithium peroxide (Li2O2). We report an inorganic-electrolyte Li-O-2 cell that cycles at an elevated temperature via highly reversible four-electron redox to form crystalline lithium oxide (Li2O). It relies on a bifunctional metal oxide host that catalyzes O-O bond cleavage on discharge, yielding a high capacity of 11 milliampere-hours per square centimeter, and O-2 evolution on charge with very low overpotential. Online mass spectrometry and chemical quantification confirm that oxidation of Li2O involves transfer of exactly 4 e(-)/O-2. This work shows that Li-O-2 electrochemistry is not intrinsically limited once problems of electrolyte, superoxide, and cathode host are overcome and that coulombic efficiency close to 100% can be achieved. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000442828700039 |
WOS关键词 | LI-O-2 BATTERIES ; AIR BATTERIES ; SUPEROXIDE ; REDUCTION ; PRINCIPLES ; CATALYSIS |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/199431 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Waterloo, Dept Chem, Waterloo, ON N2L 3G1, Canada; 2.Univ Waterloo, Waterloo Inst Nanotechnol, Waterloo, ON N2L 3G1, Canada |
推荐引用方式 GB/T 7714 | Xia, C.,Kwok, C. Y.,Nazar, L. F.. A high-energy-density lithium-oxygen battery based on a reversible four-electron conversion to lithium oxide[J]. SCIENCE,2018,361(6404):777-781. |
APA | Xia, C.,Kwok, C. Y.,&Nazar, L. F..(2018).A high-energy-density lithium-oxygen battery based on a reversible four-electron conversion to lithium oxide.SCIENCE,361(6404),777-781. |
MLA | Xia, C.,et al."A high-energy-density lithium-oxygen battery based on a reversible four-electron conversion to lithium oxide".SCIENCE 361.6404(2018):777-781. |
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