Porous Carbon Polyhedrons with High‐Level Nitrogen‐Doping for High‐Performance Sodium‐Ion Battery Anodes. Issue 20 (9th December 2016)

• Record Type: Journal Article
• Authors: Gu, Xin; Dai, Pengcheng; Li, Liangjun; Li, Junqian; Li, Dawei; Zhang, Hongyu; Zhao, Xuebo
• Is Part Of: ChemistrySelect. Volume 1:Issue 20(2016)
• Page Start: 6442
• Page End: 6447
• Publication Date: 2016-12-09
• Subjects: Carbon materials -- Nitrogen-doping -- Sodium-ion batteries; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201601758
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Sodium‐ion batteries have been regarded as probable alternatives to lithium‐ion batteries in the field of large‐scale energy storage. In this work, nitrogen‐doped porous carbon (NPC) polyhedrons are fabricated by using nitrogen‐containing metal‐organic frameworks as novel templates and precursors. The resultant NPC materials exhibit unique structure features, including porous structure, high‐level nitrogen‐doping and large surface areas. Among the NPC materials obtained at different annealing temperatures, NPC‐600 exhibits the best sodium storage properties for sodium‐ion batteries. The correlations between electrochemical properties and structure/composition of the NPC materials are disclosed. The best NPC‐600 delivers a high reversible capacity of 231 mA h g −1 at 0.05 A g −1, superior rate capability with a stable capacity of 145 mA h g −1 at 1 A g −1, and good long‐term cycling stability with a stable capacity of 182 mA h g −1 after cycling at 0.5 A g −1 for 500 cycles. The excellent sodium storage performances can be ascribed to the porous structure with enhanced reaction kinetics and high‐level nitrogen‐doping with high electrochemical reactivity. Abstract : Porous carbon polyhedrons with high‐level nitrogen‐doping are prepared by carbonizing nitrogen‐containing metal‐organic frameworks. These nitrogen‐doped porous carbon materials present an excellent sodium‐storage performance in terms of reversible capacity, rate capability, and cycling stability.