Ultrafine nanoparticles assembled Mo2C nanoplates as promising anode materials for sodium ion batteries with excellent performance. (November 2016)

• Record Type: Journal Article
• Authors: Lv, Xiaojun; Song, Junxiao; Lai, Yanqing; Fang, Jing; Li, Jie; Zhang, Zhian
• Is Part Of: Journal of energy storage. Volume 8(2016)
• Page Start: 205
• Page End: 211
• Publication Date: 2016-11
• Subjects: Energy storage and conversion -- Microstructure -- Molybdenum carbide -- Sodium ion batteries; Energy storage -- Periodicals; Energy storage -- Research -- Periodicals; 621.3126
• DOI: 10.1016/j.est.2016.08.009
• Languages: English
• ISSNs: 2352-152X

Abstract

Highlights: The Mo2 C nanoplates were synthesized by using an amine-metal oxide as the precursor. The Mo2 C nanoplates are uniformly assembled by ultrafine nanoparticles. The Mo2 C nanoplates exhibit a favorable Na-storage performance. Abstract: The presented work designs a facile strategy to prepare Mo2 C nanoplates assembled by ultrafine nanoparticles with amine-metal oxide as the precursor. When served as anode material for sodium ion batteries, the resultant material exhibits excellent sodium storage properties in terms of long term cycling stability and high rate capability. In details, the Mo2 C electrode delivers a reversible capacity of 90.8 mA h g −1 at 200 mA g −1 after 400 cycles and a high rate capability of 93.7 and 64.1 mA h g −1 at 0.5 and 1 A g −1, respectively, which could be attributed to the highly exposed active sites of Mo2 C nanoplates and intimate connection between Mo2 C nanoplates. Furthermore, the diffusion coefficients of the sodium ions based on the EIS measurement have been calculated in the range of 10 −12 –10 −9 cm 2 s −1, revealing an excellent diffusion mobility for Na atoms in the Mo2 C nanoplates. This study demonstrates that the Mo2 C is a promising anode material for sodium ion batteries.