Pore size control of porous carbons using novel silica-based copolymer template and their application in supercapacitor

Pore size control of porous carbons using novel silica-based copolymer template and their application in supercapacitor
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使用新型二氧化硅基共聚物模板控制多孔碳的孔径及其在超级电容器中的应用

DOI:
10.1016/j.matlet.2016.02.109
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发表时间:
2016-06
期刊:
影响因子:
3
通讯作者:
Zhang Haiyan
Zhang Haiyan
中科院分区:
材料科学3区
文献类型:
--
作者:
Li Zhenghui;Li Liuqing;Zhu Haiping;Liao Haiyang;Zhang Haiyan

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采用正硅酸四乙酯(TEOS)和(3-甲基丙烯氧基)-三甲氧基硅烷(MPS)共缩聚制备了一种新型硅基共聚物模板。该模板的框架形态和大小可以通过调整MPS浓度来定制。因此,通过不同的制备工艺,可以很容易地得到单峰、双峰和大孔碳。同时,该碳的孔径和BET比表面积可在4.3 ~ 55.0 nm和779 ~ 1649 m2/g之间调节。并以孔径分布控制良好的碳材料为模型,研究了纳米孔内离子的输运。电化学结果表明,碳材料的电容与比表面积呈正相关,大的中孔或大孔可以加速离子的传输,从而提高速率性能。
A brand new silica-based copolymer template is developed by co-condensation of tetraethyl orthosilicate (TEOS) and (3-methacryloxypropyl)-trimethoxysilane (MPS). The framework morphology and size of this template can be tailored by tuning the MPS concentration. Thus, unimodal mesoporous, bimodal mesoporous and macroporous carbon can be easily obtained by varying the preparation techniques. Meanwhile, the pore size and BET surface area of this carbon can be tuned from 4.3 to 55.0 nm, and 779–1649 m2/g, respectively. The as-prepared carbon materials with well-controlled pore size distribution are then used as model to investigate the ion transport inside the nanopores. The electrochemical results reveal that the capacitances of carbon materials are positively related to the surface area and the large mesopore or macropore can accelerate ion transport and then lead to enhanced rate performance.
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