木材科学与技术2024，Vol.38Issue(2)：20-28,35,10.DOI:10.12326/j.2096-9694.2023193
ZIF-67/氧化纳米纤维素衍生碳气凝胶的制备及其电化学性能研究
Study on Preparation of Carbon Aerogel Derived from ZIF-67/Oxidized Nanocellulose and Its Electrochemical Properties
摘要
Abstract
To obtain three-dimensional structured carbon aerogels with excellent electrochemical performance,cobalt oxide/carbon(CoO/C)aerogel derived from ZIF-67/TOCNF was prepared by directional freeze-drying and one-step carbonization,using TEMPO oxidized nanocellulose(TOCNF)as the matrix,adding ZIF-67.Results from scanning electron microscope(SEM)showed that the CoO/C aerogels can keep their original structure of ZIF-67/TOCNF before carbonization;CoO derived from ZIF-67 can be uniformly loaded in the carbon skeleton structure,providing more reaction sites.XRD analysis indicated that the ZIF-67/TOCNF aerogel showed that the diffraction peak of a typical ZIF-67 crystal was close to pure ZIF-67;the diffraction peak attributed to TOCNF was suppressed.Co was obtained via the thermal decomposition of ZIF-67.Co/C composite materials with better crystallinity were obtained by high-temperature carbonization.The test results through Raman spectroscopy indicated that the CoO/C composite material has a high degree of graphitization.The electrochemical test and analysis showed that the double-layer capacitance of CoO/C electrode materials was closely related to their internal three-dimensional pore structure.Compared with other carbonization temperatures(500,600,800℃),when the carbonization temperature was 700 ℃,the CoO/C-700 aerogel electrode material has the optimal electrochemical performance with a specific capacitance of up to 92 F/g(0.5 A/g)and exhibits desirable rate performance and cycle stability.关键词
TEMPO-氧化纳米纤维素/碳气凝胶/咪唑酸盐金属有机骨架/电极材料Key words
TEMPO-oxidized nanocellulose/carbon aerogel/imidazolate metal organic framework/electrode material分类
农业科技引用本文复制引用
黄佳琪,陈芋,裴飞飞,程万里,韩广萍..ZIF-67/氧化纳米纤维素衍生碳气凝胶的制备及其电化学性能研究[J].木材科学与技术,2024,38(2):20-28,35,10.基金项目
双一流专项-创新人才培养"多级Janus结构静电纺复合纳米纤维的可控制备及其构筑机理"(000/41113102). （000/41113102）
