Achieving Ni3V2O8 amorphous wire encapsulated in crystalline tube nanostructure as anode materials for lithium ion batteries. (March 2017)

• Record Type: Journal Article
• Authors: Lv, Chade; Sun, Jingxue; Chen, Gang; Yan, Chunshuang; Chen, Dahong
• Is Part Of: Nano energy. Volume 33(2017:Mar.)
• Page Start: 138
• Page End: 145
• Publication Date: 2017-03
• Subjects: Lithium-ion batteries -- Transitional-metal vanadates -- Amorphous -- Tubular nanostructure -- Electrospinning pyrolysis balance; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2017.01.044
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: Amorphous structure, possessing vast preponderances for boosting the application of lithium-ion batteries (LIBs), has drawn considerable attention as an elegant electrode structure. However, due to its thermal instability, amorphous transition-metal vanadates lack of exploration. In this work, we firstly report the fabrication of Ni3 V2 O8 amorphous wire encapsulated in crystalline tube nanostructure (NV-aWcT) by single spinneret electrospinning with subsequent heat treatment. The formation of this unique nanostructure is ascribed to shell heat transfer retardation by tuning the pyrolysis balance between "surface locking" and "inward migration" during the calcination process. Benefit from the collective characteristics of interior amorphous wire and outer tubular shell, NV-aWcT possesses mesoporosity, void spaces, defective sites and high surface areas, realizing superior electrochemical performance with high specific capacity, outstanding cycling stability, and superior rate capability (962 mA h g –1 at 300 mA g –1 after 300 cycles). Graphical abstract: Amorphous Ni3 V2 O8 wire encapsulated in crystalline tube nanostructure is fabricated as anode for Li + ion batteries with outstanding performance. Highlights: Amorphous Ni3 V2 O8 wire encapsulated in crystalline tube nanostructure is fabricated. Tuning the pyrolysis balance achieves wire-in-tube, nanotube and nanofibers. NV-aWcT exhibits high specific capacity and good cycling stability.