Heteroatom Doping Combined with Microstructured Carbon to Enhance the Performance of Sodium‐Ion Batteries. Issue 3 (21st September 2016)

• Record Type: Journal Article
• Authors: Liu, Yang; Gao, Zhiqiang
• Is Part Of: Energy technology. Volume 5:Issue 3(2017:Mar.)
• Page Start: 481
• Page End: 488
• Publication Date: 2016-09-21
• Subjects: anodes -- carbon -- doping -- microstructures -- sodium-ion batteries; Energy development -- Periodicals; Power resources -- Periodicals; 333.79
• DOI: 10.1002/ente.201600355
• Languages: English
• ISSNs: 2194-4288

Abstract

Abstract: A simple and effective procedure for the synthesis of nitrogen (N) and sulfur (S) co‐doped carbon accompanied by the formation of favorable microstructure is developed. The synthesized N and S co‐doped carbon materials are thoroughly investigated by electron microscopy, X‐ray diffractometry, X‐ray photoelectron spectroscopy, and nitrogen adsorption measurements. When applied as anodes in sodium‐ion batteries, high sodium storage capacities and excellent cyclic stability are obtained. It is observed that the contents of N and S atoms and the microstructure of the carbon have a significant effect on the performance of sodium‐ion battery. Under optimized synthetic conditions, the N and S co‐doped carbon materials have a specific capacity of 287.2 mA h g −1 in the second cycle and a stable specific capacity of 232.6 mA h g −1 even after 500 cycles at 0.5 A g −1 . Moreover, the simple and facile procedure can be conventionally adopted for the preparation of other heteroatom‐doped carbon materials. Abstract : Nitrogen (N) and sulfur (S) co‐doped carbon with a favorable microstructure was prepared via a simple and effective procedure. The heteroatom content and microstructure can be optimized by adjusting the feed ratio of thiourea to sodium citrate. The as‐optimized carbon electrode as anode for sodium‐ion batteries (SIBs) can deliver a stable specific capacity of 232.6 mA h g −1 after 500 cycles at a current density of 0.5 A g −1 .