摘要
目的:以芦苇叶为原料制备复合电极材料3D C-Co_(3)Si_(2)O_(5)(OH)_(4),并对其电化学性能进行研究。方法:以野生芦苇叶为原料,通过水热工艺从植物生物芦苇中开发复合电极材料3D C-Co_(3)Si_(2)O_(5)(OH)_(4)(3D CoSi/C),对该碳基钴硅复合材料进行表征,作为超级电容器的电极材料对其电化学性能进行研究。结果:材料表征显示3D CoSi/C复合材料表现出3D层次的多孔结构,Co_(3)Si_(2)O_(5)(OH)_(4)高度纳米化形成花瓣结构附于碳骨架使其具有高比表面积和出色的电化学性能。复合材料中当n(Co)∶n(Si)=1.2∶1时电化学性能最佳,当扫描速度为20 mV/s时,在10000次循环中显示出高循环稳定性,电容保持率达96%。结论:所制备的复合电极材料3D C-Co_(3)Si_(2)O_(5)(OH)_(4)电化学性能较好。
Objective:3D C-Co_(3)Si_(2)O_(5)(OH)_(4) composite eletrode material was prepared from reed leaves as supercapacitor and its electrochemical property was inrestigated.Methods:Wild reed leaves were used as raw materials,and composite electrode material 3D C-Co_(3)Si_(2)O_(5)(OH)_(4)(3D CoSi/C)was developed from reed through hydrothermal process,and this carbon-based cobalt-silicon composite material was used as electrode material for supercapacitor.and its electrochemical property was investigated.Results:It is shown that the 3D CoSi/C composites exhibit a 3D layered porous structure.Co_(3)Si_(2)O_(5)(OH)_(4) is highly nanocrystalized to form a petal structure attached to the carbon skeleton,which leads to its high specific surface area and excellent electrochemical performance.The electrochemical performance of the composite is the best when n(Co)∶n(Si)=1.2∶1.When the scanning speed is 20 mV/s,it shows a high cycle stability in 10000 cycles,and the capacitance retention is up to 96%.Conclusion:3D C-Co_(3)Si_(2)O_(5)(OH)_(4) is likely to be one of the most promising candidates for high-performance energy storage devices.
作者
董白雪
丁小凤
王欣平
邱笑东
朱龙羽
张少卿
DONG Baixue;DING Xiaofeng;WANG Xinping;QIU Xiaodong;ZHU Longyu;ZHANG Shaoqing(College of Chemistry and Materials Engineering,Anhui Science and Technology University,Fengyang 233100,China)
出处
《安徽科技学院学报》
2021年第6期77-82,共6页
Journal of Anhui Science and Technology University
基金
安徽省高校自然科学研究重点项目(201910879100)
安徽省大学生创新创业训练计划项目(201910879100,202010879050)。
关键词
芦苇
四水合乙酸钴
复合材料
超级电容器
Reed leaves
Cobalt acetate tetrahydrate
Composite materials
Supercapacitor
