Robust 3D macroporous structures with SnS nanoparticles decorating nitrogen-doped carbon nanosheet networks for high performance sodium-ion batteries. Issue 45 (9th November 2017)

• Record Type: Journal Article
• Authors: Hu, Xiang; Chen, Junxiang; Zeng, Guang; Jia, Jingchun; Cai, Pingwei; Chai, Guoliang; Wen, Zhenhai
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 45(2017)
• Page Start: 23460
• Page End: 23470
• Publication Date: 2017-11-09
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7ta08169c
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : The three-dimensional nitrogen-doped carbon nanosheet network architecture endows the 3D SnS/N-CNNs with exceptional lithium and sodium storage properties. Abstract : There still remains a great technological challenge for the development of advanced rechargeable batteries for future electric vehicles and for storage for a more renewable energy grid. In this paper a reliable and simple method for the preparation of three-dimensional (3D) hierarchical nanohybrids with tin sulfide (SnS) nanoparticles decorating nitrogen-doped carbon nanosheet networks (SnS/N-CNNs) as an anode material for SIBs is reported. The interconnected network structure, associated with its unique porous feature, endows the developed SnS/N-CNNs with enough straining space for mitigating the effect of volume expansion upon cycling, and also ensures highly favorable transport kinetics for both electrons and sodium ions. Accordingly, the SnS/N-CNNs exhibit an outstanding electrochemical performance with a high capacity and long-term cycling performance at a high mass loading, delivering high reversible capacity of 484 and 322 mA h g −1 at the current rate of 1.0 and 5.0 A g −1, respectively, for 1000 cycles, running at a mass loading of 1.5 mg cm −2 . Capacities of 428 and 331 mA h g −1 were obtained at the current densities of 1 A g −1 at 2.8 and 4.3 mg cm −2 loading, respectively. The first principles theoretical calculations indicated that robust binding between SnS and nitrogen-doped CNNs was of great significance for maintaining the 3D network structure that achieves high capacity, high rate capability, and superior long cyclic stability even at a high mass loading.