郭继玺,宋贤丽,郭明晰,贾殿赠,仝凤莲.化学通报,2016,79(10):942-946,951.
MnO2/煤基碳纳米纤维的制备及其在柔性超级电容器中的应用
Preparation of MnO2/CBCNFs composite materials and its electrochemical performance for flexible supercapacitor
投稿时间:2016-03-27  修订日期:2016-05-12
DOI:
中文关键词:  静电纺丝  煤基碳纳米纤维  等离子体  MnO2  柔性超级电容器
英文关键词:electrospinning  coal based carbon nanofibers  plasma  MnO2  flexible supercapacitor
基金项目:国家自然科学基金-新疆联合基金重点项目(U1203292)
作者单位E-mail
郭继玺 新疆大学 jxguo1012@163.com 
宋贤丽 新疆大学  
郭明晰 新疆大学  
贾殿赠* 新疆大学 jdz@xju.edu.cn 
仝凤莲 新疆大学  
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中文摘要:
      采用静电纺丝技术制备了柔性煤基碳纳米纤维(CBCNFs)。利用低温等离子体技术对CBCNFs进行改性,并将改性后的CBCNFs作为还原剂与高锰酸钾反应,以实现MnO2的原位还原负载,制备CBCNFs/MnO2复合材料。通过X射线衍射(XRD),扫描电镜(SEM)和透射电镜(TEM)等手段对复合材料的结构与形貌进行了表征。另外,研究了其作为柔性超级电容器电极材料的性能。结果表明:在0.1 A g-1电流密度下,CBCNFs/MnO2-2复合材料的比电容高达118 F g-1,其为CBCNFs比电容的4.5倍(26 F g-1)。在1 A g-1电流密度下,CBCNFs/MnO2-2循环1000次后比容量保持率为97%,表现出良好的循环稳定性。
英文摘要:
      The flexible coal based carbon nanofibers (CBCNFs) were prepared by electrospinning technique. The CBCNFs were well modified by using the low temperature plasma surface modification technology. The CBCNFs/MnO2 composite was prepared by in situ reduction reaction using plasma-modified CBCNFs as reductant to react with potassium permanganate (KMnO4). The morphology and structure of the obtained CBCNFs/MnO2 composites were investigated by X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM, TEM). The results showed that the nanoflakes of MnO2 well coated on the CBCNFs. Furthermore, the electrochemical performance of the electrode material as flexible supercapacitor was investigated. It was found that the CBCNFs/MnO2-2 electrodes showed a specific capacitance of 118 F g-1 at a current density of 0.1 A g-1, which is 4.5 times higher than that of the CBCNFs (26 F g-1). The capacitance retention ratio of the CBCNFs/MnO2-2 remained 97% after 1000 cycles at a current density of 1 A g-1.
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