Architectural design and phase engineering of N/B-codoped TiO2(B)/anatase nanotube assemblies for high-rate and long-life lithium storage. Issue 45 (12th October 2015)

• Record Type: Journal Article
• Authors: Chen, Chaoji; Hu, Xianluo; Zhang, Bao; Miao, Ling; Huang, Yunhui
• Is Part Of: Journal of materials chemistry. Volume 3:Issue 45(2015)
• Page Start: 22591
• Page End: 22598
• Publication Date: 2015-10-12
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c5ta06884c
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Unique TiO2 nanotube assemblies with tailored architectures and crystal phases are fabricated for lithium-storage applications. Abstract : TiO2 polymorphs hold great promise as anode candidates in lithium-ion batteries (LIBs) because of their low cost, enhanced safety and high power capability, but they suffer from poor electrical conductivity and low lithium-ion mobility. Herein, an attractive nanoassembly made of ultrathin TiO2 nanotubes with selected phases and hetero-atom doping was developed through a mild ionothermal reaction. The grain interface of TiO2 (B)/anatase, N/B codoping, and nanoassembly were elaborately engineered. They offer effective nanohighways for fast electronic and Li-ion transport, when applied as an anode in LIBs. The carbon-free, N/B-codoped TiO2 (B)/anatase nanotube nanoassemblies exhibit exceptionally high rate capability and good durability (160 mA h g −1 at 12 A g −1 and retaining 140 mA h g −1 even after 500 cycles). This work demonstrates that the integrated design of surface states and electronic structures plays a crucial role in exploring new capabilities of TiO2 polymorphs for electrochemical energy storage.