Ni-Co碱式碳酸盐纳米线阵列的原位转化及超电容性能研究
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- 英文论文题名：in-situ Conversion of Ni-Co Carbonate Hydroxide on Carbon Cloth and Their supercapacitive Performance
- 论文作者：王凡
- 英文论文作者：Fan Wang ; School of Chemistry and Chemical Engineering ; Guangxi University
- 年：2016
- 作者机构：广西大学化学化工学院;
- 论文关键词：碱式碳酸盐 ; 原位转化 ; 超级电容器
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第四十二分会：能源纳米材料物理化学
- 语种：中文
- 分类号：TB383.1;TM53
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第四十二分会 ; 能源纳米材料物理化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：160k
- 原文格式：D
- 会议级别：全国
摘要
通过水热合成方式,在导电碳纤维布表面获得了垂直生长的Ni-Co碱式碳酸盐纳米线阵列。将Ni-Co碱式碳酸盐纳米线/碳布作为超级电容器电极,在2 mol·L~(-1) KOH溶液中,1 mA·cm~(-2)电流密度下的面积比电容为450 m F·cm~(-2)。采用在碱液中浸泡的方式,使碱式碳酸盐前驱体转化为具有特征结构的氢氧化物纳米片阵列,可大大提高其超电容性能,经过36小时浸泡,电容量增加至2560 m F·cm~(-2)。随着碱转化过程的进行,充放电曲线逐渐变得对称,表明其表面电容行为不断强化,说明电极的比表面积随碱转化过程不断增大。通过形成碱式碳酸盐,再转化为氢氧化物的方式,可保证在碳纤维布表面有较大的质量负载,这有利于提高其面积或体积比电容量。
Ni-Co carbonate hydroxide nanowire arrays grown on carbon fiber cloth(CC) substrate were synthesized via hydrothermal method. The as-obtained architecture used as supercapacitor electrode showed the areal capacity of 450 m F·cm~(-2) at 1 mA·cm~(-2) in 2M KOH solution. An in-situ conversion from nanowire arrays to porous nanosheet arrays with the enhancement of capacitance was occurred by dipping the electrode into alkaline solution. The capacitor of nanosheet/CC electrode increased to 2560 m F·cm~(-2). The charge/discharge curves were also getting symmetrical after in-situ conversion, suggesting the enhanced surface capacitive behavior. The large mass loading of active materials on CC is guaranteed by the formation of carbonate hydroxide precursor and then conversion of hydroxide, in which the areal/volumetric capacitance can also be improved.
Ni-Co carbonate hydroxide nanowire arrays grown on carbon fiber cloth(CC) substrate were synthesized via hydrothermal method. The as-obtained architecture used as supercapacitor electrode showed the areal capacity of 450 m F·cm~(-2) at 1 mA·cm~(-2) in 2M KOH solution. An in-situ conversion from nanowire arrays to porous nanosheet arrays with the enhancement of capacitance was occurred by dipping the electrode into alkaline solution. The capacitor of nanosheet/CC electrode increased to 2560 m F·cm~(-2). The charge/discharge curves were also getting symmetrical after in-situ conversion, suggesting the enhanced surface capacitive behavior. The large mass loading of active materials on CC is guaranteed by the formation of carbonate hydroxide precursor and then conversion of hydroxide, in which the areal/volumetric capacitance can also be improved.
引文
[1]Zhu W.;Lu Z.;Zhang G.;Lei X.;Chang Z.;Liu J.;Sun X.J.Mater.Chem.A,2013,1:8327.
[2]Chen H.;Kang Y.;Cai F.;Zeng S.;Li W.;Chen M.;Li Q.J.Mater.Chemi.A,2015,3:1875.
[2]Chen H.;Kang Y.;Cai F.;Zeng S.;Li W.;Chen M.;Li Q.J.Mater.Chemi.A,2015,3:1875.