Low content reduced graphene oxide as the reinforcement in cellulosic conductive paper via a hetero-reduction
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Cellulosic conductive paper/film reinforced by graphene is a promising substrate for energy storage applications due to its comparable conductivity, great flexibility and low cost. However, how to balance the content ratio of graphene/cellulose well is still a challenge. Because conductive paper of low graphene content usually has poor electrical property, while high graphene content is also discouraged owing to the decrease in other properties though electrically improved. Based on this, we developed a different method to produce the graphene/cellulose composite conductive paper. Instead of a separate intermediate-fabrication, starting materials here are continuously one-pot processed, in prior to casting the intermediate paper (solid phase). Next, it is reduced by the l-ascorbic acid solution (liquid phase), followed by a filtration to give the hetero-reduced conductive paper (HRCP). Our results indicate that HRCP possesses high conductivity up to 376 ± 4 S/m, along with good thermal and dynamic behaviors, at a relatively low graphene content of 20 wt%. Therefore, HRCP is expected to be utilized in the field of emerging energy storage.
This work was supported by the Chinese Scholarship Council, National Key Technology R&D Program (2017YFB0307900); Fundamental Research Funds for the Central Universities (2017PY007) and Open Foundation of Zhejiang Provincial Key Lab. for Chem. & Bio. Processing Technology of Farm Products and Zhejiang Provincial Collaborative Innovation Center of Agricultural Biological Resources Biochemical Manufacturing (2016KF0201). All authors would like to thank Prof JY Zhu (Forest Products Laboratory, US Forest Service, USDA) for his advice of the experimental details!
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