T-Nb2O5 quantum dots prepared by electrodeposition for fast Li ion intercalation/deintercalation. (4th May 2017)

• Record Type: Journal Article
• Authors: Zhao, Guangyu; Ye, Chen; Zhang, Li; Li, Changle; Sun, Kening
• Is Part Of: Nanotechnology. Volume 28:Number 21(2017)
• Publication Date: 2017-05-04
• Subjects: lithium ion battery -- niobium oxide -- titanium nanowire array -- rate capability -- durability; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/aa6b8b
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: T -Nb2 O5 quantum dots were electrodeposited on Ti nanorod arrays to prepare Ti@ T -Nb2 O5 core–shell array electrodes. The particle size of T -Nb2 O5 could be manipulated by adjusting the depositing current density, and quantum dots several nanometers in size could be obtained at a deposition current of 6 mA cm –2 . Benefiting from the ultra-small particle size of T -Nb2 O5 and the array structure, Ti@ T -Nb2 O5 nanorod arrays exhibited good rate capability and durability when used as self-supported Li ion battery anodes. The arrays possessed capacities of 350 and 70 mAh g –1 at rate currents of 0.06 and 30 A g –1, respectively. Furthermore, the electrodes maintained 500 cycles without obvious decay at a high rate current of 30 A g –1 .