Understanding the Behavior and Mechanism of Oxygen-Deficient Anatase TiO2 toward Sodium Storage
Source abstract
Abstract
TiO2 has drawn increasing research attention as negative electrode material in sodium ion battery because of its natural abundance, low cost, nontoxicity, and facile preparation. Despite tremendous studies carried out, the sodium storage mechanism is still under discussion, and the electronic and local structures of TiO2 during sodiation/desodiation process are not well understood either. Herein, we reported a mechanism study of graphene-supported oxygen-deficient anatase TiO2 nanotubes (nanowires) as the negative electrode material for sodium ion batteries. Different from the previous reports, the insertion/extraction of Na+ ions leads to almost no changes of titanium valence state but there is a charge redistribution of O 2p orbitals which alters the hybridization between O 2p and Ti 3d states, suggested by the combined electrochemical and X-ray spectroscopic study. Both the electronic and local structures of TiO2 during the reversible sodiation/desodiation process are revealed from the Ti L-edge and O K-edge spectra. This detailed study would shed light on the material design and structural optimization of TiO2 as energy storage material in different systems.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Extraction and Separation Processes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Energy Science and Engineering and Institute of Advanced Materials, Nanjing Tech University, No. 30, Puzhu Road (S), Nanjing, Jiangsu 211800, China
Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China
Capital Normal University, 05 West Third Ring Road North, Haidian District, Beijing 100048, China
National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
South China Normal University, No. 55, West Zhongshan Road, Tianhe District, Guangzhou, Guangdong 510631, China
Funding
Ministry of Science and Technology of the People's Republic of China · Government of Jiangsu Province · National Natural Science Foundation of China
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