无机材料学报 ›› 2017, Vol. 32 ›› Issue (2): 127-134.DOI: 10.15541/jim20160182
郑 譞1,2, 龚春丽1, 刘 海1, 汪广进1,2, 程 凡1, 郑根稳1, 文 胜1, 熊传溪2
收稿日期:
2012-05-30
修回日期:
2012-09-12
出版日期:
2017-02-20
网络出版日期:
2017-01-13
作者简介:
郑 譞(1988–), 男, 博士研究生, 实验师. E-mail:63474559@qq.com
基金资助:
ZHENG Xuan1,2, GONG Chun-Li1, LIU Hai1, WANG Guang-Jin1,2, CHENG Fan1, ZHENG Gen-Wen1, WEN Sheng1, XIONG Chuan-Xi2
Received:
2012-05-30
Revised:
2012-09-12
Published:
2017-02-20
Online:
2017-01-13
About author:
ZHENG Xuan. E-mail:63474559@qq.com
Supported by:
摘要:
以聚多巴胺包覆碳纳米管为载体, 借助聚多巴胺超强的粘附性, 利用简单的溶液浸渍法制备了磷钼酸负载碳纳米管(PMA@CNTs)复合物。通过傅里叶变换红外光谱(FTIR)、X射线衍射(XRD)、X射线光电子能谱(XPS)、扫描电镜(SEM)、透射电镜(TEM)和电化学测试等对复合物的组成、结构、形态和超级电容性能进行了表征。结果表明: 聚多巴胺可将磷钼酸均匀且牢固地负载在碳纳米管上。在0.5 mol/L的H2SO4电解液中, 复合物的最大比容量为511.7 F/g, 最大能量密度可达66.8 Wh/kg, 相应的功率密度为1000 W/kg。经过1000次循环, 比容量无任何衰减。以上研究结果说明PMA@CNTs复合物在电化学储能领域拥有极好的发展前景。
中图分类号:
郑 譞,龚春丽, 刘 海, 汪广进, 程 凡, 郑根稳, 文 胜, 熊传溪. 磷钼酸负载碳纳米管复合物的制备及其超级电容性能[J]. 无机材料学报, 2017, 32(2): 127-134.
ZHENG Xuan, GONG Chun-Li, LIU Hai, WANG Guang-Jin, CHENG Fan, ZHENG Gen-Wen, WEN Sheng, XIONG Chuan-Xi. Preparation of Phosphomolybdic Acid Coated Carbon Nanotubes and Its Supercapacitive Properties[J]. Journal of Inorganic Materials, 2017, 32(2): 127-134.
图1 多巴胺氧化自聚合机理[25-27]及PMA@CNTs复合物的制备过程示意图
Fig. 1 Illustration of oxidative self-polymerization mechanism of dopamine[25-27] and preparation procedure of PMA@CNTs hybrids
图4 PMA50@CNTs的(a)XPS宽谱扫描图, (b) C1s分峰图, (c)N1s分峰图, (d)Mo3d分峰图
Fig. 4 XPS spectra of PMA50@CNTs: (a) wide scan; peak deconvolution of (b) C1s, (c) N1s, and (d) Mo3d
Element | at/% | wt/% |
---|---|---|
C | 82.99 | 79.93 |
N | 3.73 | 5.96 |
O | 7.05 | 11.37 |
P | 1.86 | 0.86 |
MO | 2.19 | 1.87 |
Total | 100.00 |
表1 PMA50@CNTs的EDX元素组成
Table1 EDX compositions of PMA50@CNTs
Element | at/% | wt/% |
---|---|---|
C | 82.99 | 79.93 |
N | 3.73 | 5.96 |
O | 7.05 | 11.37 |
P | 1.86 | 0.86 |
MO | 2.19 | 1.87 |
Total | 100.00 |
图5 (a)PMA50@CNTs的SEM照片, (b)PMA50@CNTs的EDX图谱, (c)、(d)PMA50@CNTs的TEM照片
Fig. 5 SEM images of PMA50@CNTs (a), EDXspectra of PMA50@CNTs (b), and TEM images of PMA50@CNTs (c), (d)
图7 PDA-CNTs、PMA0.4@CNTs、PMA2@CNTs、PMA10@CNTs和PMA50@CNTs在10 mV/s扫速下的循环伏安曲线(a)和在2 A/g电流密度下的恒流充放电曲线(b)以及PMA50@CNTs在不同扫速下的循环伏安曲线(c), 不同电流密度下的恒流充放电曲线(d)
Fig. 7 (a) Cyclic voltammograms at scan rate of 10 mV/s) and (b) galvanostatic charge-dischargecyclic curves at current density of 2 A/g for PDA-CNTs, PMA0.4@CNTs, PMA2@CNTs, PMA10@CNTs andPMA50@CNTs coin cell, and (c) cyclic voltammograms at different scan rates and (d) charge/discharge curves at different current densities for PMA50@CNTs Supercapacitors in 0.5 mol/L H2SO4 electrolytes
图8 (a)PMA50@CNTs在不同电流密度和扫速下的比容量曲线和(b)PMA50@CNTs在5 A/g电流密度下的循环稳定性测试结果
Fig. 8 (a) Specific capacitance of the PMA50@CNT selectrode as a function of scan rate and current density and (b) cycling stability of the PMA50@CNTs electrode at a current density of 5 A/g
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