权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Development of Electrode for Super Capacitor by Using Carbon Gels with Hieratically Controlled Porous Structure

分级控制多孔结构碳凝胶超级电容器电极的研制

基本信息

批准号：
18360380
负责人：
TAMON Hajime
金额：
$ 10.64万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18360380/
关键词：
Electric double layer capacitor Sol-gel method Hieratically porous carbon gels Carbon electrode Resorcinol Formaldehyde Freeze drying Cyclic characteristics 大容量キャパシターゾル-ゲル法ホルムアルデヒドゲル

项目摘要

Interesting porous carbon materials, called carbon cryogels, have been synthesized via sol-gel polymerization of resorcinol with formaldehyde, freeze drying, and pyrolysis. The cryogel consists of nanoparticles of carbon, and mesopores are formed among the particles. Carbon cryogels are unique materials with high surface areas and large mesopore volumes, being expected to be used as catalysts, adsorbents, electric double layer capacitors, lithium ion battery, and materials for chromatographic separation.Monolithic carbon cryogels can be synthesized by molding the hydrogels prior to drying. In the present work, carbon cryogel electrodes in the form of tablet were prepared without using a binder for electric double layer capacitor systems. A three-electrode cell with an Ag/AgCl reference electrode whereby 40 M KOH was served as an electrolyte was performed to measure the capacitance. It was found that capacitance per carbon electrode weight could be increased based on precise controlling of porous structure and CO_2 activation at 1000℃. However, the capacitance per electrode volume could not be improved by these methodologies.The apparent density of carbon cryogel electrode was tried to be increased by repolymerizing resorcinol and formaldehyde in the large mesopores and macropores of organic cryogels, precursors of carbon cryogels. As the results, the density of electrode could be doubled. Cyclic characteristics of tablet-type carbon cryogel electrode synthesized were experimentally studied. The capacitance of carbon electrode could be doubled by the repolymerization in organic cryogels. The decrease of capacitance was within 3 %, even if the charging/discharging were repeated 10000 times. It was found that charging/discharging using the carbon electrode prepared were reversible by cyclic voltammetry.

通过间苯二酚与甲醛的溶胶-凝胶聚合、冷冻干燥和热解，已经合成了有趣的多孔碳材料，称为碳冷冻剂。低温凝胶由碳纳米颗粒组成，颗粒之间形成中孔。碳低温材料是一种具有高比表面积和大介孔体积的独特材料，有望作为催化剂、吸附剂、双电层电容器、锂离子电池和色谱分离材料。通过在干燥前对水凝胶进行成型，可以合成整体碳冷冻剂。在本工作中，制备了不使用粘结剂的片状碳低温凝胶电极，用于电双层电容器系统。采用三电极电池，以Ag/AgCl为基准电极，以40 M KOH作为电解液测量电容。通过对多孔结构的精确控制和对1000℃下CO_2活化的控制，可以提高每碳电极重量的电容。然而，这些方法不能提高每电极体积的电容。用间苯二酚和甲醛在有机低温凝胶（碳低温凝胶的前体）的大介孔和大孔中进行再聚合，以提高碳低温凝胶电极的表观密度。结果表明，电极密度可提高一倍。实验研究了合成的片式碳低温凝胶电极的循环特性。通过在有机冷冻机中进行再聚合，碳电极的电容量可提高一倍。在重复充放电10000次的情况下，电容量下降幅度在3%以内。循环伏安法发现，所制备的碳电极充放电是可逆的。

项目成果

期刊论文数量（0）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Porous Properties of Activated Carbons Prepared from Mixtures of Synthesized Phenolic Resins with Metal Salts

合成酚醛树脂与金属盐混合物制备活性炭的多孔性能

DOI：
发表时间：
2007
期刊：
J. Chem. Eng. Japan 40
影响因子：
0
作者：
K. Nakagawa;et. al.
通讯作者：
et. al.

Submicron mesoporous carbon spheres by ultrasonic emulsification

DOI：
10.1007/s10934-006-9082-2
发表时间：
2008-06
期刊：
Journal of Porous Materials
影响因子：
2.6
作者：
N. Tonanon;W. Intarapanya;W. Tanthapanichakoon;H. Nishihara;S. Mukai;H. Tamon
通讯作者：
N. Tonanon;W. Intarapanya;W. Tanthapanichakoon;H. Nishihara;S. Mukai;H. Tamon

Preparation of carbon cryogels from wattle tannin and furfural