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- W4309835929 abstract "Defect engineering, such as manipulating oxygen vacancies (OVs), which can alter the local structure and electronic properties of metal oxides, has attracted increasing attention for improving the charge-storage performance of electrode materials. In this work, a high-pressure hydrogenation method was developed to fabricate oxygen-deficient TiO 2 . Two TiO 2 phases, namely rutile (TiO 2 -R) and anatase (TiO 2 -A), and their hydrogenated phases (denoted with the prefix “H”) are investigated as sodium-ion battery (SIB) anodes. The charge-discharge properties of both phases can be significantly enhanced via the hydrogenation treatment. The introduction of OVs increases the electronic and ionic conductivity of TiO 2 , and the disordered TiO 2 provides more electro-active sites for sodiation/desodiation reactions. For the first time, electrochemcial properties of the H-TiO 2 -R and H-TiO 2 -A electrodes are systematically compared. The H-TiO 2 -A electrode exhibits an excellent high-rate capacity of 100 mAh g –1 at 10000 mA g –1 and great cycling stability of 80% capacity retention after 4500 cycles. The superior performance is well supported by a generalized gradient approximation Perdew-Burke-Ernzerhof density functional calculation. The proposed anode and material modification strategy have great potential for high-power and high-durability SIB applications." @default.
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- W4309835929 date "2022-10-09" @default.
- W4309835929 modified "2023-09-25" @default.
- W4309835929 title "Effect of Hydrogenation on the Electrochemical Performance of Anatase and Rutile TiO<sub>2</sub> As Anode for Sodium-Ion Batteries" @default.
- W4309835929 doi "https://doi.org/10.1149/ma2022-024413mtgabs" @default.
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