文献类型：期刊文献

英文题名：Biomass-Derived Hard Carbon with Interlayer Spacing Optimization toward Ultrastable Na-Ion Storage

作者：Hou, Zhidong[1];Lei, Da[1];Jiang, Mingwei[1];Gao, Yuyang[1];Zhang, Xiang[1];Zhang, Yu[2];Wang, Jian-Gan[1]

机构：[1]Northwestern Polytech Univ & Shaanxi Joint Lab Gra, Ctr Nano Energy Mat, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：15

期号：1

起止页码：1367

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20230113345464);WOS:【SCI-EXPANDED(收录号:WOS:000906822400001)】；

基金：The work was financially supported by the National Natural Science Foundation of China (52272239, 22109044, and 51821091) , Fundamental Research Funds for the Central Universities (3102019JC005 and D5000210894) , and Innova-tion Foundation for Doctor Dissertation of Northwestern Polytechnical University. The authors thank the TEM analysis from the Analytical & Testing Center of Northwestern Polytechnical University.

语种：英文

外文关键词：hard carbon; biomass; carbonization; interlayer spacing; sodium-ion batteries

摘要：Hard carbons as a kind of nongraphitized amorphous carbon have been recognized as potential anode materials for sodium-ion batteries (SIBs) due to its large interlayer spacing. However, the issues in terms of onerous synthetic procedure and elusive working mechanism remains critical bottlenecks for practical implement. Herein, we report a facile production of tubular hard carbon through direct carbonization of platanus flosses (FHC) for the first time. Through optimizing the pyrolysis temperatures, the FHC obtained at 1300 degrees C possesses a key balance between the interlayer spacing and surface area, which can maintain the substantial active sites as well as reduce the irreversible sodium storage. Accordingly, it can deliver a reversible capacity of 324.6 mAh g-1 with a high initial Coulombic efficiency of 80%, superb rate property of 107.2 mAh g-1 at 2 A g-1, and long operating stability over 1000 cycles. Furthermore, the in situ Raman spectroscopic studies certify that sodium ions are stored in FHC following the "adsorption-insertion" mechanism. Our study could provide a promising route for large-scale development of the biomass-derived carbonaceous anodes for high-performance SIBs.