化学
阳极
化学工程
钠
碳纤维
无机化学
多孔性
金属
有机化学
复合材料
电极
物理化学
复合数
材料科学
工程类
作者
Ping Wang,Geng Zhang,Xuyang Wei,Rui Liu,Jiangjiang Gu,Fuyang Cao
摘要
Biomass-derived carbon materials prepared via pyrolysis from natural wood structures show potential for a storage application. Natural wood is composed of multiple carbon sources, including lignin, hemicellulose, and cellulose, which influence the formation and microstructure of pyrolysis carbon. However, the mechanism is not fully understood. In this work, vast lignin is selectively consumed via biodegradation with fungi from basswood. The results demonstrate that the as-prepared carbon material has a short-range ordered graphitic structure after thermal treatment. The improved graphitization degree of carbon suggests that cellulose is beneficial to graphite formation during pyrolysis. The elevated graphitization degree helps to improve the charge transfer and the thermodynamic stability of the electrode reaction. As a proof of concept, the obtained carbon current collector as a sodium-metal anode can undergo cycling at an areal capacity of 10 mAh cm-2 for over 4500 h and yield an excellent Coulombic efficiency of >99.5%.
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