TY - JOUR
T1 - Free-Standing Reduced Graphene Oxide Paper with High Electrical Conductivity
AU - Gao, Jie
AU - Liu, Chengyan
AU - Miao, Lei
AU - Wang, Xiaoyang
AU - Chen, Yu
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant Nos. 51572049, 51562005).
PY - 2016/3/1
Y1 - 2016/3/1
N2 - With high carrier mobility and low cost, reduced graphene oxide (RGO) shows bright prospects for use in the field of thermoelectric materials. To investigate the intrinsic thermoelectric properties of RGO sheets, we prepared RGO papers which were reduced by HBr solution for 5 min, 20 min, and 60 min, respectively. Thermogravimetry analysis (TGA) and Raman analysis showed that the conjugated carbon network of graphene oxide (GO) was restored during the reduction process and the thermal stability of the RGO papers was much better than that of GO paper. The RGO paper that was reduced for 60 min and then annealed in Ar/H2 atmosphere exhibited the highest electrical conductivity of 3.22 × 105 S/m at 160°C. As the reduction degree of the RGO paper deepens, the Seebeck coefficient gradually transforms from positive to negative, indicating that the conduction type of RGO paper can be controlled by regulating the reduction degree.
AB - With high carrier mobility and low cost, reduced graphene oxide (RGO) shows bright prospects for use in the field of thermoelectric materials. To investigate the intrinsic thermoelectric properties of RGO sheets, we prepared RGO papers which were reduced by HBr solution for 5 min, 20 min, and 60 min, respectively. Thermogravimetry analysis (TGA) and Raman analysis showed that the conjugated carbon network of graphene oxide (GO) was restored during the reduction process and the thermal stability of the RGO papers was much better than that of GO paper. The RGO paper that was reduced for 60 min and then annealed in Ar/H2 atmosphere exhibited the highest electrical conductivity of 3.22 × 105 S/m at 160°C. As the reduction degree of the RGO paper deepens, the Seebeck coefficient gradually transforms from positive to negative, indicating that the conduction type of RGO paper can be controlled by regulating the reduction degree.
KW - Reduced graphene oxide
KW - Seebeck coefficient
KW - electrical conductivity
KW - free-standing paper
UR - http://www.scopus.com/inward/record.url?scp=84959500936&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84959500936&partnerID=8YFLogxK
U2 - 10.1007/s11664-015-4000-5
DO - 10.1007/s11664-015-4000-5
M3 - Article
AN - SCOPUS:84959500936
SN - 0361-5235
VL - 45
SP - 1290
EP - 1295
JO - Journal of Electronic Materials
JF - Journal of Electronic Materials
IS - 3
ER -