DataVXAdvanced MaterialsPaper
journal article·2019-11

Heterostructured TiO2 Spheres with Tunable Interiors and Shells toward Improved Packing Density and Pseudocapacitive Sodium Storage

Xin Xu, Bo Chen, Junping Hu, Bowen Sun, Xiaohui Liang, Nan Li, Shengyuan A. Yang, Hua Zhang, Wei Huang, Ting Yu

Advanced Materials· Volume 31· Issue 46
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Source abstract

Abstract

Abstract Insertion‐type anode materials with beneficial micro‐ and nanostructures are proved to be promising for high‐performance electrochemical metal ion storage. In this work, heterostructured TiO2 shperes with tunable interiors and shells are controllably fabricated through newly proposed programs, resulting in enhanced pseudocapacitive response as well as favorable Na+ storage kinetics and performances. In addition, reasonably designed nanosheets in the extrinsic shells are also able to reduce the excess space generated by hierarchical structure, thus improving the packing density of TiO2 shperes. Lastly, detailed density functional theory calculations with regard to sodium intercalation and diffusion in TiO2 crystal units are also employed, further proving the significance of the surface‐controlled pseudocapacitive Na+ storage mechanism. The structure design strategies and experimental results demonstrated in this work are meaningful for electrode material preparation with high rate performance and volume energy density.
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Research context

Energy storageNanomaterials

OpenAlex topics: Advancements in Battery Materials · Supercapacitor Materials and Fabrication · Advanced Battery Materials and Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Shaanxi Institute of Flexible Electronics (SIFE) Northwestern Polytechnical University (NPU) Xi'an 710072 China

Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore

Center for Programmable Materials School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore

Research Laboratory for Quantum Materials Singapore University of Technology and Design Singapore 487372 Singapore

School of Science Nanchang Institute of Technology Nanchang 330099 China

Center for Quantum Transport and Thermal Energy Science School of Physics and Technology Nanjing Normal University Nanjing 210023 China

Department of Chemistry City University of Hong Kong Kowloon Hong Kong China

Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM) Nanjing Tech University (NanjingTech) Nanjing 211800 China

Funding

Natural Science Foundation of Jiangsu Province · Priority Academic Program Development of Jiangsu Higher Education Institutions · Ministry of Education of the People's Republic of China · National Natural Science Foundation of China

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