Robust hollow TiO2 spheres for lithium/sodium ion batteries with excellent cycling stability and rate capability. Issue 23 (12th October 2021)

• Record Type: Journal Article
• Authors: Yao, Menglong; Wang, Hongkang; Qian, Ruifeng; Yao, Tianhao; Shi, Jian-Wen; Cheng, Yonghong
• Is Part Of: Inorganic chemistry frontiers. Volume 8:Issue 23(2021)
• Page Start: 5024
• Page End: 5033
• Publication Date: 2021-10-12
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d1qi00990g
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : We report a facile solvothermal synthesis of hollow TiO2 nanospheres using phenolic resin nanospheres as templates under magnetic stirring condition, followed by annealing, which demonstrate excellent lithium/sodium storage performance. Abstract : We report a facile solvothermal synthesis of hollow TiO2 nanospheres using phenolic resin nanospheres as templates under magnetic stirring conditions, followed by annealing. The as-prepared hollow TiO2 nanospheres show an inner diameter of ∼400 nm, a shell thickness of ∼45 nm, and a high specific surface area of 33.8 m 2 g −1 . When used as anode materials for lithium-ion batteries and sodium-ion batteries, the hollow TiO2 demonstrates excellent cycling stability and rate capability, delivering high lithium storage capacities of 178/138 mA h g −1 at 0.2/1.0 A g −1 after 200/1000 cycles, and high sodium storage capacities of 213/177/115 mA h g −1 after 200/1000/4000 cycles at 0.2/1.0/5.0 A g −1 . The outstanding electrochemical performance is related to the robust structural stability of the hollow nanostructured TiO2, which can be expected as a promising anode material for next generation alkali metal ion batteries.