Boosting Reversibility and Stability of Li Storage in SnO2-Mo Multilayers: Introduction of Interfacial Oxygen Redistribution
作者:
Lan, XX (Lan, Xuexia) [1] ; Cui, J (Cui, Jie) [2] ; Zhang, XF (Zhang, Xiaofeng) [3] ; Hu, RZ (Hu, Renzong) [1] ; Tan, L (Tan, Liang) [1] ; He, JY (He, Jiayi) [1] ; Zhang, HP (Zhang, Houpo) [1] ; Xiong, XY (Xiong, XingYu) [1] ; Yang, XF (Yang, Xianfeng) [2] ; Wu, SQ (Wu, Shunqing) [3] ; ...更多内容
ADVANCED MATERIALS
卷34
期9
文献号2106366
DOI10.1002/adma.202106366
出版时间MAR 2022
在线发表JAN 2022
已索引2022-01-29
文献类型Article
摘要
Among the promising high-capacity anode materials, SnO2 represents a classic and important candidate that involves both conversion and alloying reactions toward Li storage. However, the inferior reversibility of conversion reactions usually results in low initial Coulombic efficiency (ICE, approximate to 60%), small reversible capacity, and poor cycling stability. Here, it is demonstrated that by carefully designing the interface structure of SnO2-Mo, a breakthrough comprehensive performance with ultrahigh average ICE of 92.6%, large capacity of 1067 mA h g(-1), and 100% capacity retention after 700 cycles can be realized in a multilayer Mo/SnO2/Mo electrode. Furthermore, high capacity retentions are also achieved in pouch-type Mo/SnO2/Mo||Li half cells and Mo/SnO2/Mo||LiFePO4 full cells. The amorphous SnO2/Mo interfaces, which are induced by redistribution of oxygen between SnO2 and Mo, can precisely adjust the reversible capacity and cycling stability of the multilayers, while the stable capacities are parabolic with the interfacial density. Theoretical calculations and in/ex situ investigation reveal that oxygen redistribution in SnO2/Mo heterointerfaces boosts Li-ion transport kinetics by inducing a built-in electric field and improves the reaction reversibility of SnO2. This work provides a new understanding of interface-performance relationship of metal-oxide hybrid electrodes and pivotal guidance for creating high-performance Li-ion batteries.
关键词
作者关键词built-in electric fieldsconversion reactionsinterface engineeringoxygen redistributiontin dioxide
Keywords PlusLITHIUM-STORAGEANODE MATERIALSCONVERSION-REACTIONELECTRODE MATERIALSOPTICAL-PROPERTIESPERFORMANCECAPACITYENHANCESNNANOSTRUCTURES
作者信息
通讯作者地址
Hu, Renzong;
Zhu, Min
(通讯作者)
South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Sch Mat Sci & Engn, Guangzhou 510640, Peoples R China
通讯作者地址
Wu, Shunqing
(通讯作者)
Xiamen Univ, Jiujiang Res Inst, Key Lab Low Dimens Condensed Matter Phys, Dept Phys,OSED,Dept Educ Fujian Prov, Xiamen 361005, Peoples R China
地址
1 South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Sch Mat Sci & Engn, Guangzhou 510640, Peoples R China
2 South China Univ Technol, Analyt & Testing Ctr, Guangzhou 510640, Peoples R China
3 Xiamen Univ, Jiujiang Res Inst, Key Lab Low Dimens Condensed Matter Phys, Dept Phys,OSED,Dept Educ Fujian Prov, Xiamen 361005, Peoples R China
电子邮件地址msrenzonghu@scut.edu.cnwsq@xmu.edu.cnmemzhu@scut.edu.cn
类别/分类
研究方向ChemistryScience & Technology - Other TopicsMaterials SciencePhysics