New Insights into the Relationship between Micropore Properties, Ionic Sizes, and Electric Double-Layer Capacitance in Monolithic Carbon Electrodes
New Insights into the Relationship between Micropore Properties, Ionic Sizes, and Electric Double-Layer Capacitance in Monolithic Carbon Electrodes
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DOI：
10.1021/jp309010p
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发表时间：
2012-12-20
影响因子：
3.7
通讯作者：
Abe, Takeshi
中科院分区：
文献类型：
--
作者：
Hasegawa, George;Kanamori, Kazuyoshi;Abe, Takeshi
采用不同孔隙性质的整体式碳电极，研究了孔隙性质和离子尺寸对双电层电容的影响。采用纳米萃取技术，以桥联聚倍半硅氧烷凝胶为原料，制备了具有高比表面积、孔结构均匀的炭块体。通过氮气物理吸附法和压汞法对炭块的孔隙性质进行了详细的研究。通过循环伏安法研究了各单块碳电极在不同水溶液中的电化学性能，以研究离子尺寸的影响。这些基本分析为上级双电层电容器的每种电解质的有效尺寸提供了新的见解。
The effects of the pore properties and the ionic sizes on the electric double-layer capacitances have been investigated by using the monolithic carbon electrodes with different pore properties. The carbon monoliths with high surface areas which possess homogeneous pore properties in the whole monoliths were prepared from the bridged-polysilsesquioxane gels via the nanophase extraction technique. The detailed investigations of the pore properties of the carbon monoliths were conducted by the nitrogen physisorption measurement as well as the mercury porosimetry. The electrochemical property of each monolithic carbon electrode was examined by the cyclic voltammetry in the different aqueous electrolytes in order to investigate the effects of the ionic sizes. These fundamental analyses have provided new insights into the efficient micropore sizes in each electrolyte for the superior electric double-layer capacitors.