Achieving high initial Coulombic efficiency for competent Na storage by microstructure tailoring from chiral nematic nanocrystalline cellulose  

作　　者：Fei Xie Zhen Xu Zhenyu Guo Anders CSJensen Jingyu Feng Hui Luo Feixiang Ding Yaxiang Lu Yong-Sheng Hu Maria-Magdalena Titirici 

机构地区：[1]Key Laboratory for Renewable Energy,Beijing Key Laboratory for New Energy Materials and Devices,Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing,China [2]Department of Chemical Engineering,Imperial College London,London,UK [3]School of Physical and Chemical Sciences,Queen Mary University of London,London,UK [4]Huairou Division,Institute of Physics,Chinese Academy of Sciences,Beijing,China [5]Yangtze River Delta Physics Research Center Co.,Ltd.,Liyang,China [6]College of Materials Science and Optoelectronics Technology,University of Chinese Academy of Sciences,Beijing,China

出　　处：《Carbon Energy》2022年第5期914-923,共10页碳能源（英文）

基　　金：Natural Science Foundation of Beijing Municipality,Grant/Award Number:2212022;Science and Technology Facilities Council,Grant/Award Number:ST/R006873/1;China Postdoctoral Science Foundation,Grant/Award Number:2021M693367;National Natural Science Foundation of China,Grant/Award Numbers:51725206,51861165201,52072403,52122214;Engineering and Physical Sciences Research Council,Grant/Award Numbers:EP/R021554/2,EP/S018204/2;Chinese Academy of Sciences,Grant/Award Numbers:2020006,XDA21070500。

摘　　要：Although it has been proven that porous,heteroatomic,and defective structures improve Na storage performance,they also severely affect the initial Coulombic efficiency(ICE)due to the huge irreversible capacity in the first cycle,which always limits the practical application of carbon anodes in commercial Na-ion batteries(NIBs).Here,we show the successful synthesis of nanocrystalline cellulose and the derivative hard carbons.A series of treatments including acid hydrolysis,hydrothermal carbonization,and hightemperature pyrolysis help tune the pores,heteroatoms,and defects to achieve an optimized balance between superior ICE and reversible capacity of up to 90.4%and 314 mAh g^(−1).This study highlights that tailoring the electrode microstructure could be an important strategy in the future design of carbonaceous anode materials for high-performance Na-ion batteries.

关 键 词：hard carbon MICROSTRUCTURE Na storage nanocrystalline cellulose 

分 类 号：O62[理学—有机化学]