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Title: Na3V2(PO4)(2)F-3@C dispersed within carbon nanotube frameworks as a high tap density cathode for high-performance sodium-ion batteries
Authors: Shen, C
Long, H
Wang, GC
Lu, W 
Shao, L
Xie, KY
Issue Date: 2018
Publisher: Royal Society of Chemistry
Source: Journal of materials chemistry A, 14 Apr. 2018, v. 6, no. 14, p. 6007-6014 How to cite?
Journal: Journal of materials chemistry A 
Abstract: Currently, the sodium-ion battery is one of the hottest topics in the field of battery research. For practical application, however, high tap density, which is a key point of electrode materials, has always been ignored in previous studies. Here, we present the fabrication of a NASICON-type Na3V2(PO4)(2)F-3@C/CNT composite cathode with a high tap density of 1.2 g cm(-3) for high power and long lifespan sodium-ion batteries. The spherical NVPF@C/CNTs synthesized through a spray drying method are composed of micron-sized primary particles dispersed within the intertwined carbon nanotube matrix. The CNT framework not only provides an efficient electrical highway between primary particles, but also forms a stable mechanical backbone for secondary particles. The initial discharge capacity of NVPF@C/CNTs is about 113 mA h g(-1) at a current density of 1C, and the cell retains 98.2% after 300 cycles. Besides, a high rate capacity of 85 mA h g(-)1 has been achieved at 30C. We believe that our work presented here will be favorable for accelerating the commercialization of sodium-ion batteries.
ISSN: 2050-7488
EISSN: 2050-7496
DOI: 10.1039/c8ta00990b
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