Heterostructured CoS2/NiS2 nanoparticles encapsulated in bamboo-like carbon nanotubes as a high performance anode for sodium ion batteries. (10th June 2020)

• Record Type: Journal Article
• Authors: Yao, Xiang; Cheng, Hui; Jiang, Zhouyang; Han, Qingyue; Wang, Yanjie; Wang, Suqing
• Is Part Of: New journal of chemistry. Volume 44:Number 25(2020)
• Page Start: 10404
• Page End: 10409
• Publication Date: 2020-06-10
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d0nj00941e
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Heterostructured binary metal-sulfide CoS2 /NiS2 compounds encapsulated in bamboo-like carbon nanotubes (CoS2 /NiS2 @B-CNT), were prepared and applied as an anode for sodium ion batteries. Abstract : Sodium ion batteries (SIBs) are promising energy storage systems because sodium is a low cost and abundant resource. Appropriate electrode materials with high performance are a prerequisite to satisfy demand for efficient SIBs. Heterostructured electrodes show high specific capacity and rate capacity for SIBs owing to the synergistic effect of multiple components compared with a single component. Here, heterostructured binary metal-sulfide CoS2 /NiS2 compounds encapsulated in bamboo-like carbon nanotubes (CoS2 /NiS2 @B-CNT), were prepared by pyrolysis and sulfidation procedures. The heterostructured anode material demonstrates a high capacity of 625.8 mA h g −1 at 0.1 A g −1, a distinguished rate capacity (491.6 mA h g −1 at 10 A g −1 ), and stable cyclic property (497.6 mA h g −1 at 5 A g −1 after 1000 cycles, 93.0% capacity retention). This design of a heterostructure offers a new avenue to develop anode materials with high performance for SIBs.