Li-ion and Na-ion transportation and storage properties in various sized TiO2 spheres with hierarchical pores and high tap density. Issue 9 (30th November 2016)

• Record Type: Journal Article
• Authors: Li, Yong; Wang, Shuan; He, Yan-Bing; Tang, Linkai; Kaneti, Yusuf Valentino; Lv, Wei; Lin, Zhiqun; Li, Baohua; Yang, Quan-Hong; Kang, Feiyu
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 9(2017)
• Page Start: 4359
• Page End: 4367
• Publication Date: 2016-11-30
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6ta08611j
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : The pore distribution and the size of titanium oxide spheres were found to exert profound influence on the Li-ion and Na-ion storage and transportation. Abstract : Titanium oxide (TiO2 ) has attracted great interest as a promising anode material for lithium (Li) ion batteries (LIBs) and sodium (Na) ion batteries (SIBs). However, the key factors that dictate the Li-ion and Na-ion storage and transportation in TiO2 remain unclear. Herein, we report a facile hydrolysis route to crafting a variety of high tap-density TiO2 spheres with controllable size and hierarchical pores. The Li-ion and Na-ion storage properties based on these TiO2 spheres were systematically investigated. The pore distribution and the size of TiO2 spheres were found to exert profound influence on the Li-ion and Na-ion storage and transportation. The Li-ion storage and transportation in dense TiO2 spheres was dependent mainly upon the micropore distribution and volume and independent of the size of spheres. In contrast, the excellent Na-ion storage and transportation in TiO2 spheres was enabled by the loose structure with a large macroscopic pore volume and shortened Na-ion diffusion length. High tap-density TiO2 spheres (1.06 g cm −3 ) with superior Li-ion and Na-ion storage properties were produced, exhibiting a Li-ion storage specific capacity of 189 mA h g −1 at 1C and a high capacity retention of 88.1% after 100 cycles, and a Na-ion storage specific capacity of 184 mA h g −1 at 1C and capacity retention of 90.5% after 200 cycles. The ability to understand the critical factors controlling the Li-ion and Na-ion storage in high tap-density TiO2 spheres enables their implementation for practical applications in Li-ion and Na-ion batteries.