Self-supported hard carbon anode from fungus-treated basswood towards sodium-ion batteries  

作　　者：Ping Wang Yu-Jie Guo Wan-Ping Chen Hui Duan Huan Ye Hu-Rong Yao Ya-Xia Yin Fei-Fei Cao 

机构地区：[1]Institute of Advanced Materials,Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education,College of Chemistry and Chemical Engineering,Jiangxi Normal University,Nanchang 330022,China [2]College of Science,Huazhong Agricultural University,Wuhan 430070,China [3]Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China [4]Fujian Provincial Engineering Technology Research Center of Solar Energy Conversion and Energy Storage,Fuzhou 350117,China

出　　处：《Nano Research》2023年第3期3832-3838,共7页纳米研究（英文版）

基　　金：supported by the National Key Research and Development Program of China(No.2021YFA2400400);the National Natural Science Foundation of China(Nos.22109058,22122902,22075299,and 21975091);the Fundamental Research Funds for the Central Universities of China(No.20230614);the Jiangxi Provincial Education Department(No.GJJ200338);the Open Fund of Fujian Provincial Engineering Technology Research Center of Solar Energy Conversion and Energy Storage(No.SECES2003);Beijing Natural Science Foundation(No.2222089).

摘　　要：Hard carbon derived from biomass is regarded as a promising anode material for sodium-ion batteries(SIBs)because of its low operating potential,high capacity,resource availability,and low cost.However,scientific and technological challenges still exist to prepare hard carbon with a high initial Coulombic efficiency(ICE),an excellent rate capability,and good cycling stability.In this work,we report a self-supported hard carbon electrode from fungus-pretreated basswood with an improved graphitization degree and a low tortuosity.Compared with the hard carbon derived from basswood,the hard carbon electrode from fungus-pretreated basswood has an improved rate capability of 242.3 mAh·g^(−1)at 200 mA·g^(−1)and cycling stability with 93.9%of its capacity retention after 200 cycles at 40 mA·g^(−1),as well as the increased ICE from 84.3%to 88.2%.Additionally,ex-situ X-ray diffraction indicates that Na+adsorption caused the sloping capacity,whereas Na+intercalation between interlayer spacing corresponded to the low potential plateau capacity.This work provides a new perspective for the preparation of high-performance hard carbon and gains the in-depth understanding of Na storage mechanism.

关 键 词：sodium-ion battery ANODE hard carbon fungus-pretreated basswood 

分 类 号：TM912[电气工程—电力电子与电力传动]