Ultralight-Weight Graphene Aerogels with Extremely High Electrical Conductivity

被引:39
作者
dos Santos-Gomez, Lucia [1 ]
Garcia, Jose R. [2 ]
Montes-Moran, Miguel A. [3 ]
Angel Menendez, Jose [3 ]
Garcia-Granda, Santiago [1 ]
Arenillas, Ana [3 ]
机构
[1] Oviedo Univ, CINN CSIC, Dept Phys & Analyt Chem, Avda Julian Claverla 8,Campus El Cristo, Oviedo 33006, Spain
[2] Oviedo Univ, CINN CSIC, Dept Organ & Inorgan Chem, Oviedo 33006, Spain
[3] INCAR CSIC, Inst Ciencia & Tecnol Carbono, Francisco Pintado Fe 26, Oviedo 33011, Spain
关键词
electrical conductivity; graphene aerogels; porosity; CATALYTIC GRAPHITIZATION; CARBON XEROGELS; SURFACE-AREA; LOW-DENSITY; OXIDE; PERFORMANCE; AGGREGATION;
D O I
10.1002/smll.202103407
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The integration of 2D graphene sheets into a porous and macroscopic structure is extremely attractive for application in several electrochemical fields. In this regard, for the first time, the synthesis of 3D graphene aerogels is reported by using a rapid, easy, cost-effective, and scalable at industrial level methodology. These aerogels integrate the intrinsic properties of graphene with a high pore volume. To achieve this ultraporous graphene network, resorcinol/formaldehyde polymer with controllable porosity is employed as a binder and a cross-linker material, and a graphene oxide solution provides the graphene building blocks. Two series of materials with and without catalyst for resorcinol/formaldehyde reaction and with different synthesis conditions and graphene contents are studied. The resulting graphene aerogels present low density, large macroporosity, and electrical conductivity values as high as 852 S m(-1), with 97.58% of porosity, which is the highest value of electrical conductivity reported so far in the literature for ultralight-weight graphene aerogels.
引用
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页数:10
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