Oxygen-deficient TiO Yolk-shell Spheres for Enhanced Lithium Storage Properties

被引：0

作者：

Zhaoqian Li ^{[1
]}

Yuqi Peng ^{[1
]}

Chaofeng Liu ^{[2
]}

Xianxi Zhang ^{[3
]}

Xiuling Li ^{[4
]}

Yang Huang ^{[1
]}

Yingke Ren ^{[5
]}

Denghui Ji ^{[6
]}

Guozhong Cao ^{[2
]}

机构：

[1] Key Laboratory of Photovoltaic and Energy Conservation Materials, CAS,Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences

[2] Department of Materials Science and Engineering, University of Washington

[3] Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage & Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University

[4] College of Physics and Information Engineering, Hebei Advanced Thin Films Laboratory, Hebei Normal University

[5] College of Science, Hebei University of Science and Technology

[6] College of Physics, Mechanical and Electronical College, Shijiazhuang University

来源：

Energy & Environmental Materials | 2022年 / 01期

关键词：

D O I：

暂无

中图分类号：

TM912 [蓄电池];

学科分类号：

0808 ;

摘要：

Anatase 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 H2 Ti5 O11·3 H2 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 m Ah g-1 at 100 m A g-1 and 71% of capacity retention after 5000 cycles at 2 Ag-1.

引用

页码：238 / 244

页数：7

共 36 条

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