Carbon nanospheres derived from sunflower seed husk composited with anatase TiO2 used as anode for lithium-ion battery

• Published in: Ionics Vol. 28; no. 4; pp. 1635 - 1646
• Main Authors: Li, Xiangji, Wang, Xinyan, Xu, Xi, Yu, Kaifeng, Liang, Ce
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.04.2022; Springer Nature B.V
• Subjects: Activated carbon; Ammonium peroxodisulfate; Anatase; Anodes; Battery cycles; Carbon; Chemistry; Chemistry and Materials Science; Composite materials; Condensed Matter Physics; Electrochemistry; Energy Storage; Lithium; Lithium-ion batteries; Nanospheres; Optical and Electronic Materials; Original Paper; Rechargeable batteries; Renewable and Green Energy; Sunflowers; Titanium dioxide; Lithium-ion battery; Anatase TiO; Composite; Sunflower seed husk; Carbon nanospheres
• ISSN: 0947-7047; 1862-0760
• DOI: 10.1007/s11581-021-04402-5

In this paper, the sunflower seed husks were chosen as raw material to prepare carbon matrix. The ammonium persulfate ((NH 4 ) 2 S 2 O 8 ) was used as catalyst to obtain the biomass-derived carbon and anatase TiO 2 composite. To explore the influence of different crystal TiO 2 on the composite material, the carbon mix with P25 TiO 2 was prepare to contrast. The size and distribution of the titanium dioxide in nanosphere activated carbon and anatase TiO 2 composite named NAC@TiO 2 -A are both uniform. And the structure of prepared material is crosslinked spherically, of which specific surface area is 365.31 m 2  g −1 and average pore diameter is 3.65 nm. When using NAC@TiO 2 -A as the anode of lithium-ion battery, after 100 cycles at 0.2C, the discharge specific capacity held steady at 895.3 mA h g −1 . And it also delivered a high capacity of 513.6 mA h g −1 at 2C and 379.3 mA h g −1 at 5C after 100 cycles.