木材纤维锚定二氧化铈电极材料的制备及其性能研究  

Study on Preparation and Electrochemical Properties of Wood Fibers Anchored CeO_(2)Electrode Material

作　　者：严格 卿彦[1] 陈洋羊 廖宇 张振 李蕾[1] YAN Ge;QING Yan;CHEN Yangyang;LIAO Yu;ZHANG Zhen;LI Lei(College of Materials Science and Engineering,Central South University of Forestry and Technology,Changsha 410004,China)

机构地区：[1]中南林业科技大学材料科学与工程学院,湖南长沙410004

出　　处：《生物质化学工程》2024年第1期9-17,共9页Biomass Chemical Engineering

基　　金：国家自然科学基金重大项目(31890771)。

摘　　要：利用木材纤维含氧基团的吸附作用锚定生长二氧化铈,成功制备出一维中空管状结构复合电极材料(WF@CeO_(2))。通过调控硝酸铈的添加量改善电极材料的电化学性能,并探讨了木材纤维对二氧化铈的增效作用。研究结果表明:当硝酸铈的添加量为2 mmol时,WF@CeO_(2)-2样品的比表面积可达303.73 m^(2)/g,所制备的电极在电流密度0.5 A/g下表现出高比电容(371 F/g),木材纤维的存在极大地提高了二氧化铈电极材料的电化学性能。以WF@CeO_(2)-2电极组装的非对称超级电容器的比电容可达34.5 F/g,其峰值能量密度为44.16 Wh/kg,峰值功率密度为4002.7 W/kg,在经过5000次充放电循环后电容保持率为91.1%,表现出良好的循环稳定性。Using the adsorption of oxygen-containing groups in wood fibers to anchor the growth of cerium dioxide,onedimensional hollow tubular structure composite electrode material(WF@CeO_(2))was successfully prepared.The electrochemical properties of the electrode materials were improved by adjusting the addition amount of cerium nitrate,and the synergistic effect of wood fibers on cerium dioxide was discussed.The results showed that the specific surface area of WF@CeO_(2)-2 sample could reach 303.73 m^(2)/g when the amount of cerium nitrate was 2 mmol.The prepared electrode exhibited a high specific capacitance of 371 F/g at the current density of 0.5 A/g.The existence of wood fiber greatly improved the electrochemical performance of cerium dioxide electrode material.The specific capacitance of the asymmetric supercapacitor assembled with WF@CeO_(2)-2 electrode could reach 34.5 F/g,the peak energy density was 44.16 Wh/kg,and the peak power density was 4002.7 W/kg.After 5000 cycles of charge and discharge,the capacitor retention rate was 91.1%,showing good cycle stability.

关 键 词：木材纤维 二氧化铈 增效作用 超级电容器 电化学性能 

分 类 号：TQ35[化学工程]