journal article·2021-06-28

Hydrogenated Anatase and Rutile TiO2 for Sodium-Ion Battery Anodes

Jagabandhu Patra, Shu-Chi Wu, Ing-Chi Leu, Chun-Chen Yang, Rajendra S. Dhaka, Shigeto Okada, Hsiu-Liang Yeh, Chieh-Ming Hsieh, Bor Kae Chang, Jeng-Kuei Chang

ACS Applied Energy Materials· Volume 4· Issue 6
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Abstract

Defective transition metal oxides prepared via a hydrogenation treatment have attracted growing attention for use as electrode materials of batteries and supercapacitors due to their improved electrochemical properties. In this work, two TiO2 phases, namely, rutile (TiO2-R) and anatase (TiO2-A), and their hydrogenated phases (denoted with the prefix “H”) are investigated as anodes for sodium-ion batteries. The charge–discharge properties of both phases can be enhanced via a high-pressure hydrogenation treatment. For example, H-TiO2-A exhibits exceptional high-rate performance (100 mA h g–1 at 10,000 mA g–1 vs 5 mA h g–1 at the same current rate for TiO2-A) and great cycling stability (80% capacity retention after 4500 cycles). The introduction of oxygen vacancies increases the electronic and ionic conductivity of TiO2 and the disordered structure offers more active sites for electrochemical reactions. The H-TiO2-R and H-TiO2-A electrodes are compared for sodium-ion battery applications. The superior performance of the former electrode is supported by the generalized gradient approximation Perdew–Burke–Ernzerhof density functional calculation.
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Research context

OpenAlex topics: Advancements in Battery Materials · Supercapacitor Materials and Fabrication · ZnO doping and properties

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

Affiliations

Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, 1001 University Road, Hsinchu 30010, Taiwan

Hierarchical Green-Energy Materials (Hi-GEM) Research Center, National Cheng Kung University, 1 University Road, Tainan 70101, Taiwan

Institute of Materials Science and Engineering, National Central University, 300 Jhong-Da Road, Taoyuan 32001, Taiwan

Department of Materials Science and Engineering, National Tsing Hua University, 101, Guangfu Road, Hsinchu 300, Taiwan

Department of Materials Science, National University of Tainan, 33, Section 2, Shulin Street, West Central District, Tainan 70005, Taiwan

Battery Research Center of Green Energy, Ming Chi University of Technology, 84, Gongzhuan Road, Taishan District, New Taipei City 243, Taiwan

Department of Physics, Indian Institute of Technology Delhi, Huaz Khas, New Delhi 110016, India

Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka 816-8580, Japan

Department of Chemical and Materials Engineering, National Central University, 300 Jhong-Da Road, Taoyuan 32001, Taiwan

Funding

Ministry of Science and Technology, Taiwan

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