低聚倍半硅氧烷为碳源制备有序分级孔碳及电容性能研究
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- 英文论文题名：Synthesis and electrochemical capacitive performance of hierarchically ordered porous carbon materials from oligosilsesquioxane precursors
- 论文作者：李亚波 ; 曾超 ; 夏良俊 ; 胡艳艳 ; 李煜 ; 刘丹 ; 屈德宇
- 英文论文作者：Yabo Li ; Chao Zeng ; Liangjun Xia ; Yanan Hu ; Yu Li ; Dan Liu ; Deyu Qu ; Department of Chemistry ; School of Chemistry ; Chemical Engineering and Life Sciences ; Wuhan University of Technology ; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing ; Wuhan University of Technology
- 年：2016
- 作者机构：武汉理工大学化生学院化学系;武汉理工大学材料复合新技术国家重点实验室;
- 论文关键词：氮掺杂 ; 有序介孔碳 ; 活化 ; 超级电容器
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十六分会：纳米材料合成与组装
- 语种：中文
- 分类号：TQ127.11;TB383.4
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十六分会 ; 纳米材料合成与组装
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：154k
- 原文格式：D
- 会议级别：全国
摘要
碳基超级电容器具有充放电时间短、使用温度范围宽、循环寿命长、安全性能好等诸多优点,是最具应用前景的新型储能装置之一。但是,与二次电池相比,其能量密度较低。在保持碳基超级电容器高转化速度、高比功率的前提下,通过调控多孔碳电极材料的孔隙结构来提高电容器的能量密度是该领域的研究重点。孔径与净电解液离子尺寸相当的超微孔碳拥有大比容量储能特性,但介/大孔尺度的离子传输通道的缺乏影响其大倍率充放电性能。鉴于此,本论文的工作希望构筑有序微/介分级孔碳结构,且微孔尺寸均匀并与电解液净离子尺寸相匹配,以获得高比容量特性;同时微孔之间又通过规整、有序的介孔连接,缩短离子迁移距离并降低离子传输内阻,以获得大倍率性能。本论文的基本研究思路是创新地提出以具有分子内有机/无机杂化结构特点的多面体低聚倍半硅烷(POSS)作为碳源和产生均匀微孔的自模板剂,并以嵌段共聚物聚集体或者胶态晶体作为产生有序介孔的软、硬模板,从而构筑出有序微/介分级多孔碳结构。
However, the absence of the mesopores or macropores as ion diffusion/transfer paths in the ultra-microporous carbon structures results in significant capacitance fading at high current loads. Therefore, this work was devoted to the construction of hierarchically ordered microporous/mesoporous carbon structures. In the structures, the micropores are uniform and their sizes are close to the size of neat electrolyte ions, which leads to high specific capacitive performance. Meanwhile, the micropores are interconnected by the ordered mesopores,which can shorten the ion transfer distance and reduce ion transfer resistance, leading to high rate performance.Herein, we innovatively prepared hierarchically ordered micro-/mesoporous porous carbons by employing cubic polyhedral oligosilsesquioxane(POSS) intramolecular organic/inorganic hybrid structure as carbon precursor and self-template of producing uniform micropores, and block copolymer aggregates or colloidal crystals as soft or hard templates of producing ordered mesopores.
However, the absence of the mesopores or macropores as ion diffusion/transfer paths in the ultra-microporous carbon structures results in significant capacitance fading at high current loads. Therefore, this work was devoted to the construction of hierarchically ordered microporous/mesoporous carbon structures. In the structures, the micropores are uniform and their sizes are close to the size of neat electrolyte ions, which leads to high specific capacitive performance. Meanwhile, the micropores are interconnected by the ordered mesopores,which can shorten the ion transfer distance and reduce ion transfer resistance, leading to high rate performance.Herein, we innovatively prepared hierarchically ordered micro-/mesoporous porous carbons by employing cubic polyhedral oligosilsesquioxane(POSS) intramolecular organic/inorganic hybrid structure as carbon precursor and self-template of producing uniform micropores, and block copolymer aggregates or colloidal crystals as soft or hard templates of producing ordered mesopores.
引文
[1]Y.T.Hu,H.J.Liu,Q.Q.Ke and J.Wang,J Mater Chem A,2014,2,11753-11758.
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[3]T.-Y.Ma,L.Liu and Z.-Y.Yuan,Chem Soc Rev,2013,42,3977-4003.
[2]F.Q.Zhang,Y.Meng,D.Gu,Y.Yan,C.Z.Yu,B.Tu and D.Y.Zhao,J Am Chem Soc,2005,127,13508-13509.
[3]T.-Y.Ma,L.Liu and Z.-Y.Yuan,Chem Soc Rev,2013,42,3977-4003.