Electrostatic layer-by-layer self-assembly multilayer films based on graphene and manganese dioxide sheets as novel electrode materials for supercapacitors
Electrostatic layer-by-layer self-assembly multilayer films based on graphene and manganese dioxide sheets as novel electrode materials for supercapacitors
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DOI：
10.1039/c0jm02650f
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发表时间：
2011-01-01
影响因子：
--
通讯作者：
Yang, Shengrong
中科院分区：
文献类型：
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作者：
Li, Zhangpeng;Wang, Jinqing;Yang, Shengrong
以聚（4-苯乙烯磺酸钠）介导的石墨烯片（PSS-GS）、二氧化锰（MnO 2）片和聚（二烯丙基二甲基铵）（PDDA）为构建单元，通过静电层层自组装构建了一类新型多层膜。利用紫外可见光谱、场发射扫描电子显微镜和X射线光电子能谱对多层膜的微观结构和形貌进行了表征。在0.1 M Na 2SO 4电解液中，用循环伏安法和恒电流充放电法研究了合成多层膜电极的电容性能。在0.283 A g（-1）的放电电流密度下，ITO/（PDDA/PSS-GS/PDDA/MnO 2）（10）电极的比电容达到263 F g（-1）;此外，该薄膜电极还表现出良好的循环稳定性和较高的库仑效率。可以预见的是，合成的多层膜凭借其优异的电容可控性、良好的循环稳定性、低成本和环境友好性，将作为新型电极材料在超级电容器和其他器件中具有广阔的应用前景。
A new class of multilayer films was constructed by electrostatic layer-by-layer self-assembly, using poly(sodium 4-styrenesulfonate) mediated graphene sheets (PSS-GS), manganese dioxide (MnO2) sheets, and poly(diallyldimethylammonium) (PDDA) as building blocks. UV-vis spectroscopy, field-emission scanning electron microscopy and X-ray photoelectron spectroscopy were used to characterize the microstructures and morphologies of the multilayer films. Capacitive properties of the synthesized multilayer film electrodes were studied using cyclic voltammetry and galvanostatic charge/discharge in 0.1 M Na2SO4 electrolyte. The specific capacitance of the ITO/(PDDA/PSS-GS/PDDA/MnO2)(10) electrode reached 263 F g(-1) at a discharge current density of 0.283 A g(-1); moreover, this film electrode also shows a good cyclic stability and high Coulombic efficiency. Anticipatedly, the synthesized multilayer films will find promising applications as a novel electrode material in supercapacitors and other devices in virtue of their outstanding characteristics of controllable capacitance, good cycle stability, low cost and environmentally benign nature.