三维筋撑石墨烯的合成及其高性能超级电容器
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- 英文论文题名：3D Strutted-Graphene:Synthesis and High-Performance Supercapacitors
- 论文作者：王学斌
- 英文论文作者：Xuebin Wang ; College of Engineering and Applied Sciences ; Nanjing University
- 年：2016
- 作者机构：南京大学现代工程与应用科学学院;
- 论文关键词：三维石墨烯 ; 筋撑石墨烯 ; 发泡法 ; 超级电容器 ; 高功率密度
- 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-第三十分会：化学电源
- 语种：中文
- 分类号：O613.71;TM53
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十分会 ; 化学电源
- 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：158k
- 原文格式：D
- 会议级别：全国
摘要
石墨烯拥有独特的物理化学性质和功能,然而在一般的石墨烯粉体材料中,片与片之间的相互连接较弱,破坏了电子声子传输和力传递的连续性,而且相邻石墨烯片层容易聚集,减少了可利用的表面。三维石墨烯是希望通过三维化结构设计,来减少片层之间的阻抗,从而让石墨烯的优良性质传递到宏观尺度的块体材料之上。目前,三维石墨烯的高效低成本合成依然是一个挑战。本文主要发展了一种发泡法,以制备全新的三维石墨烯——筋撑石墨烯。筋撑石墨烯由连续相的石墨筋网络构成骨架(筋厚数微米),骨架上撑起单层/寡层的石墨烯薄膜。它们整体构成了一种泡沫状的块体材料,具有优秀的导电、机械性质和高比表面积(1000 m~2/g),而且这种方法具有低成本和高产量的优势[1]。由于其连续和连通的结构,基于筋撑石墨烯的电化学超级电容器,具有接近于零的内接触电阻,体现出极高的最大功率密度,在水体系中达到10~6W/kg[1]。同时具有高能量密度,在有机体系中达到了50Wh/kg(有机体系最大功率密度340kW/kg)[2]。
The current graphene products still suffer from poor electrical conductivity,low surface area,and insufficient mechanical strength/elasticity;the interconnected self-supported reproducible 3D graphenes remain unavailable.Herein,we developed a novel chemical blowing approach to synthesize a new 3D graphene foam,i.e.strutted graphene(SG).SG consists of mono- /few-layered graphitic membranes tightly "glued",rigidly fixed and spatially scaffolded by micrometer-scale graphitic struts.Such topological configuration provides intimate structural interconnectivities,freeway for electron/phonon transports,huge accessible surface area,as well as robust mechanical properties.Strutted graphene overcomes the drawbacks of all presently available 3D graphene products and opens up a wide horizon for diverse practical usages,e.g.high-power high-energy electrochemical capacitors[1].Their supercapacitors achieve the maximum-power-density of 10~6 W/kg in aqueous system,and realize high energy density of 50 Wh/kg at the high maximum-power-density of 340 kW/kg in organic system[2].
The current graphene products still suffer from poor electrical conductivity,low surface area,and insufficient mechanical strength/elasticity;the interconnected self-supported reproducible 3D graphenes remain unavailable.Herein,we developed a novel chemical blowing approach to synthesize a new 3D graphene foam,i.e.strutted graphene(SG).SG consists of mono- /few-layered graphitic membranes tightly "glued",rigidly fixed and spatially scaffolded by micrometer-scale graphitic struts.Such topological configuration provides intimate structural interconnectivities,freeway for electron/phonon transports,huge accessible surface area,as well as robust mechanical properties.Strutted graphene overcomes the drawbacks of all presently available 3D graphene products and opens up a wide horizon for diverse practical usages,e.g.high-power high-energy electrochemical capacitors[1].Their supercapacitors achieve the maximum-power-density of 10~6 W/kg in aqueous system,and realize high energy density of 50 Wh/kg at the high maximum-power-density of 340 kW/kg in organic system[2].
引文
[1]Wang,X.;Zhang,Y.;Zhi,C.;Wang,X.;Tang,D.;Xu,Y.;Weng,Q.;Jiang,X.;Mitome,M.;Golberg,D.;Bando,Y.Nat.Commun.2013,4:2905.
[2]Jiang,X.;Wang,X.;Dai,P.;Li,X.;Weng,Q.;Wang,X.;Tang,D.;Tang,J.;Bando Y.;Golberg,D.Nano Energy 2015,16:81.
[2]Jiang,X.;Wang,X.;Dai,P.;Li,X.;Weng,Q.;Wang,X.;Tang,D.;Tang,J.;Bando Y.;Golberg,D.Nano Energy 2015,16:81.