Remarkable enhancement in the electrochemical activity of maricite NaFePO4 on high-surface-area carbon cloth for sodium-ion batteries. (May 2019)

• Record Type: Journal Article
• Authors: Ma, Xudong; Xia, Jiuyang; Wu, Xuehang; Pan, Zhiyi; Shen, Pei Kang
• Is Part Of: Carbon. Volume 146(2019)
• Page Start: 78
• Page End: 87
• Publication Date: 2019-05
• Subjects: NaFePO4 -- Self-supporting -- Carbon cloth -- Acid-etching -- Sodium-ion batteries; Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2019.02.004
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: The electrochemical reversibility of maricite NaFePO4 is highly dependent on the rational design of the nanostructure. We propose, for the first time, an effective strategy of applying an acid-etched carbon cloth (eCC) as the substrate to be loaded with NaFePO4 @C and significantly enhance the electrochemical activity of the maricite. The electrochemical test results show that the NaFePO4 @C loaded on eCC exhibits a much higher reversible capacity (142 mAh g −1 at 0.1 C) than that (107 mAh g −1 at 0.1 C) of the material loaded on an Al current collector. Moreover, compared to that of the untreated carbon cloth (CC), NaFePO4 @C loaded on eCC shows a superior rate performance and ultralong cycling lifetime at high mass loading levels. The excellent electrochemical performance of the NaFePO4 @C-eCC electrode benefits from the regular grooves on the surface of the eCC, which provide a significantly larger surface area that is favorable to NaFePO4 @C strongly and uniformly binding onto the carbon fibers. The self-supporting electrode configuration, that is, without the addition of an inactive binder and conductive additives, facilitates fast ion/electronic transport and reduces the aggregation of the NaFePO4 @C particles. This work is expected to provide a new route for achieving high electrochemical activity in NaFePO4 . Graphical abstract: Image 1