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Oxygen-deficient TiO2 Yolk-shell Spheres for Enhanced Lithium Storage Properties
Li, Zhaoqian1; Peng, Yuqi1; Liu, Chaofeng2; Zhang, Xianxi3; Li, Xiuling4; Huang, Yang1; Ren, Yingke5; Ji, Denghui6; Cao, Guozhong2
2021-02-02
Source PublicationENERGY & ENVIRONMENTAL MATERIALS
Corresponding AuthorHuang, Yang(yhuang@rntek.cas.cn) ; Ren, Yingke(renyingke@yeah.net) ; Ji, Denghui(jidenghui2007@163.com) ; Cao, Guozhong(gzcao@u.washington.edu)
AbstractAnatase TiO2 is a promising anode material for lithium-ion batteries (LIBs) owing to its low cost and stability. However, the intrinsically kinetic limits seriously hindered its lithium-ion storage capability. Here we present that anatase TiO2 with rich oxygen vacancies can enhance its lithium-ion storage performance. We synthesize anatase TiO2 with well-retained hierarchical structure by annealing the H2Ti5O11 center dot 3H(2)O yolk-shell spheres precursor in nitrogen atmosphere. EPR and XPS data evidence that the oxygen-deficient environment could generate abundant oxygen vacancies in the as-derived anatase TiO2, which leads to improved electron conductivity and reduced charge-transfer resistance. The rich oxygen vacancies and high structural integrity of the hierarchical yolk-shell spheres enable the as-derived anatase TiO2 yolk-shell spheres with a high specific capacity of 280 mAh g(-1) at 100 mA g(-1) and 71% of capacity retention after 5000 cycles at 2 A g(-1).
Keywordanatase TiO2 lithium-ion batteries oxygen vacancies yolk-shell spheres
DOI10.1002/eem2.12156
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2019YFB1503200] ; National Science Foundation[CBET-1803256] ; Anhui Provincial Natural Science Foundation[1908085QB52] ; CASHIPS Director's Fund[YZJJ2018QN21] ; Shijiazhuang University Doctoral Scientific Research Startup Fund Project[20BS019] ; Colleges and universities in Shandong Province science and technology projects[J17KA097] ; CAS Key Laboratory of Photovoltaic and Energy Conservation, Chinese Academy of Sciences[PECL2018QN006]
Funding OrganizationNational Key R&D Program of China ; National Science Foundation ; Anhui Provincial Natural Science Foundation ; CASHIPS Director's Fund ; Shijiazhuang University Doctoral Scientific Research Startup Fund Project ; Colleges and universities in Shandong Province science and technology projects ; CAS Key Laboratory of Photovoltaic and Energy Conservation, Chinese Academy of Sciences
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000614921800001
PublisherWILEY
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.hfcas.ac.cn:8080/handle/334002/119633
Collection中国科学院合肥物质科学研究院
Corresponding AuthorHuang, Yang; Ren, Yingke; Ji, Denghui; Cao, Guozhong
Affiliation1.Chinese Acad Sci, Inst Solid State Phys, Hefei Inst Phys Sci, Key Lab Photovolta & Energy Conservat Mat,CAS, Hefei 230031, Peoples R China
2.Hebei Univ Sci & Technol, Coll Sci, Shijiazhuang 050018, Hebei, Peoples R China
3.Shijiazhuang Univ, Coll Phys, Mech & Elect Coll, Shijiazhuang 050035, Hebei, Peoples R China
4.Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA
5.Liaocheng Univ, Shandong Prov Key Lab, Sch Chem & Chem Engn, Collaborat Innovat Ctr Chem Energy Storage & Nove, Liaocheng 252000, Shandong, Peoples R China
6.Hebei Normal Univ, Coll Phys & Informat Engn, Hebei Adv Thin Films Lab, Shijiazhuang 050024, Hebei, Peoples R China
Recommended Citation
GB/T 7714
Li, Zhaoqian,Peng, Yuqi,Liu, Chaofeng,et al. Oxygen-deficient TiO2 Yolk-shell Spheres for Enhanced Lithium Storage Properties[J]. ENERGY & ENVIRONMENTAL MATERIALS,2021.
APA Li, Zhaoqian.,Peng, Yuqi.,Liu, Chaofeng.,Zhang, Xianxi.,Li, Xiuling.,...&Cao, Guozhong.(2021).Oxygen-deficient TiO2 Yolk-shell Spheres for Enhanced Lithium Storage Properties.ENERGY & ENVIRONMENTAL MATERIALS.
MLA Li, Zhaoqian,et al."Oxygen-deficient TiO2 Yolk-shell Spheres for Enhanced Lithium Storage Properties".ENERGY & ENVIRONMENTAL MATERIALS (2021).
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