Realizing the Embedded Growth of Large Li2O2 Aggregations by Matching Different Metal Oxides for High-Capacity and High-Rate Lithium Oxygen Batteries | |
He M(贺睦)1,4; Zhang, Shoufeng1,2; Zhang P(张鹏)3; Ren, Aimin2; Xu S(许珊)4; Yan XB(阎兴斌); Xu S(许珊); Lang JW(郎俊伟)3; Yan XB(阎兴斌)3 | |
刊名 | Advanced Science |
2017 | |
卷号 | 4期号:11页码:1700172(1-10) |
关键词 | Discharge Characteristics Li2o2 Lio2 Adsorption Energy Li-o-2 Batteries Metal Oxides |
ISSN号 | 2198-3844 |
DOI | 10.1002/advs.201700172 |
英文摘要 | Large Li2O2 aggregations can produce high‐capacity of lithium oxygen (Li‐O2) batteries, but the larger ones usually lead to less‐efficient contact between Li2O2 and electrode materials. Herein, a hierarchical cathode architecture based on different discharge characteristics of α‐MnO2 and Co3O4 is constructed, which can enable the embedded growth of large Li2O2 aggregations to solve this problem. Through experimental observations and first‐principle calculations, it is found that α‐MnO2 nanorod tends to form uniform Li2O2 particles due to its preferential Li+ adsorption and similar LiO2 adsorption energies of different crystal faces, whereas Co3O4 nanosheet tends to simultaneously generate Li2O2 film and Li2O2 nanosheets due to its preferential O2 adsorption and different LiO2 adsorption energies of varied crystal faces. Thus, the composite cathode architecture in which Co3O4 nanosheets are grown on α‐MnO2 nanorods can exhibit extraordinary synergetic effects, i.e., α‐MnO2 nanorods provide the initial nucleation sites for Li2O2 deposition while Co3O4 nanosheets provide dissolved LiO2 to promote the subsequent growth of Li2O2. Consequently, the composite cathode achieves the embedded growth of large Li2O2 aggregations and thus exhibits significantly improved specific capacity, rate capability, and cyclic stability compared with the single metal oxide electrode. |
学科主题 | 材料科学与物理化学 |
资助项目 | 低维材料与化学储能课题组 ; 多相催化-2研究组 |
语种 | 英语 |
WOS记录号 | WOS:000416155900014 |
资助机构 | the National Nature Science Foundation of China (Grant Nos. 21573265 ; 51501208 ; 21473071) ; China Scholarship Council (Grant No. 201500090190) ; the Natural Science Foundation of Gansu Province of China (Grant No. 1606RJYA258) |
内容类型 | 期刊论文 |
源URL | [http://ir.licp.ac.cn/handle/362003/23815] |
专题 | 兰州化学物理研究所_清洁能源化学与材料实验室 兰州化学物理研究所_OSSO国家重点实验室 兰州化学物理研究所_固体润滑国家重点实验室 |
通讯作者 | Yan XB(阎兴斌); Xu S(许珊) |
作者单位 | 1.Univ Chinese Acad Sci, Beijing 100039, Peoples R China 2.Jilin Univ, State Key Lab Theoret & Computat Chem, Changchun 130023, Jilin, Peoples R China 3.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lab Clean Energy Chem & Mat, Lanzhou 730000, Gansu, Peoples R China 4.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Gansu, Peoples R China |
推荐引用方式 GB/T 7714 | He M,Zhang, Shoufeng,Zhang P,et al. Realizing the Embedded Growth of Large Li2O2 Aggregations by Matching Different Metal Oxides for High-Capacity and High-Rate Lithium Oxygen Batteries[J]. Advanced Science,2017,4(11):1700172(1-10). |
APA | He M.,Zhang, Shoufeng.,Zhang P.,Ren, Aimin.,Xu S.,...&Yan XB.(2017).Realizing the Embedded Growth of Large Li2O2 Aggregations by Matching Different Metal Oxides for High-Capacity and High-Rate Lithium Oxygen Batteries.Advanced Science,4(11),1700172(1-10). |
MLA | He M,et al."Realizing the Embedded Growth of Large Li2O2 Aggregations by Matching Different Metal Oxides for High-Capacity and High-Rate Lithium Oxygen Batteries".Advanced Science 4.11(2017):1700172(1-10). |
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