Insights into the pre-oxidation process of phenolic resin-based hard carbon for sodium storage. (7th April 2021)

• Record Type: Journal Article
• Authors: Wei, Zheng; Zhao, Hai-Xia; Niu, Yu-Bin; Zhang, Si-Yuan; Wu, Yuan-Bo; Yan, Hui-Juan; Xin, Sen; Yin, Ya-Xia; Guo, Yu-Guo
• Is Part Of: Materials chemistry frontiers. Volume 5:Number 10(2021)
• Page Start: 3911
• Page End: 3917
• Publication Date: 2021-04-07
• Subjects: Materials science -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1039/d1qm00077b
• Languages: English
• ISSNs: 2052-1529

Abstract

Abstract : The influence of the pre-oxidation process on the microstructure and sodium storage performance of phenolic resin-based hard carbon, as anode materials for sodium-ion batteries, is investigated. Abstract : Phenolic resin as a typical hard carbon precursor has attracted much attention towards sodium-ion batteries (SIBs) due to its high carbon yield and large reversible capacity. However, phenolic resin-based hard carbon commonly suffers from limited cycling performance and low initial Coulombic efficiency. Herein, we synthesized a hard carbon material from phenolic resin and manipulated its microstructure through tuning the pyrolysis temperature and pre-oxidation procedure. In particular, hard carbon materials with pre-oxidation deliver much improved capacity retention in contrast with those without pre-oxidation. Further analysis shows that with the pre-oxidation procedure, the enlarged d 002 spacing, the much disordered microstructure, and the increased content of oxygen-containing functional groups are responsible for the performance enhancement of hard carbon. This study provides an in-depth understanding of the microstructure feature of phenolic resin-based hard carbon and opens up a feasible avenue for the design of high-performance carbon anode materials for their application in SIBs.