Highly compacted TiO2/C micospheres via In-situ surface-confined intergrowth with ultra-long life for reversible Na-Ion storage
作者：JP Yin;HN Yang;WQ Kong;JZ Man;ZY Zhou;W Feng; JC Sun; ZS Wen*
關鍵字：Titanium oxide,Na-Ion batteries,Highly compacted structure,Oxygen defect,Anode materials
論文來源：期刊
具體來源：Journal of Colloid and Interface Science
發表時間：2020年
TiO2 as the promising anode material candidate of sodium-ion battery suffers from poor conductivity and slow ion diffusion rate, which severely hampers its development. Highly compacted TiO2/C microspheres without inner pores/tunnels are synthesized by a very facile one-pot rapid processing method based on novel in-situ surface-confined inter-growth mechanism. This highly compacted TiO2/C microspheres exhibit an excellent electrochemical performance of reversible Na+ storage despite with relatively large particle/aggregation size from submicrometer to micrometer. An outstanding cycling stability extending to 10,000 cycles is gained with a high retention capacity of 140.5 mAh g-1 at a current rate of 2 A g-1. An ultra-high reversible capacity of 362 mAh g-1 close to its theoretic specific capacity is obtained at a current rate of 0.05 A g-1. The successful combination of highly compacted structure with large particle size, excellent electrochemical performance as well as rapid cost-effective preparing process might provide a potential industrial approach for efficiently synthesizing electrode materials for Na ion batteries.
https://doi.org/10.1016/j.jcis.2020.08.060