N-rich carbon coated CoSnO3 derived from in situ construction of a Co–MOF with enhanced sodium storage performance. Issue 11 (1st March 2018)

• Record Type: Journal Article
• Authors: Zou, Guoqiang; Hou, Hongshuai; Zhao, Ganggang; Ge, Peng; Yin, Dulin; Ji, Xiaobo
• Is Part Of: Journal of materials chemistry. Volume 6:Issue 11(2018)
• Page Start: 4839
• Page End: 4847
• Publication Date: 2018-03-01
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7ta10448k
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A series of CoSnO3 –NC nanobox materials with controllable carbon content were acquired by the in situ carbonization of CoSnO3 –MOFs, showing a controllable N-rich carbon content range from 7.5% to 24.6%. Abstract : In this study, N-rich carbon coated interconnected CoSnO3 nanoboxes (CoSnO3 –NCs) with controllable amounts of N-rich carbon ranging from 7.5% to 24.6% were firstly prepared by the carbonization of CoSnO3 –MOFs. Impressively, the preparation of CoSnO3 –MOFs has been realized for the first time by directly utilizing CoSnO3 as the precursor under solvent-free conditions, bridging between the cobalt(ii ) ion in the skeleton of CoSnO3 and the 2-methylimidazole. Interestingly, the growth of these CoSnO3 –MOFs can be manipulated by changing the amount of 2-methylimidazole used, resulting in a tunable N-rich carbon content. Furthermore, the electrochemical storage behavior of these materials for SIBs was initially explored. Compared with the pure CoSnO3, the as-resulted CoSnO3 –NC materials showed largely enhanced sodium storage performance with a reversible capacity of 493.9 mA h g −1 at a current density of 0.1 A g −1 after 100 cycles. Moreover, the as-prepared materials showed an excellent high rate storage performance with a remarkable capacity of 273.8 mA h g −1 at 1 A g −1 after 1000 cycles. This work provides a new approach for constructing Co–MOFs as well as providing an efficient N-rich carbon-coating route, which may be expanded to other Co-based oxides and can greatly expand the development of new species of Co-based MOFs.