| 摘要: |
| 目的 以纳米纤维素气凝胶为骨架，对苯二酚为增强相，并加入还原氧化石墨烯，制备纳米纤维素/还原氧化石墨烯复合电极薄膜，将其应用于超级电容器。方法 采用超声处理制备纳米纤维素/氧化石墨烯混合溶液；在高温高压的环境下，加入对苯二酚，采用水热合成法和冷冻干燥法制备纳米纤维素/还原氧化石墨烯气凝胶，并最终制成电极膜。结果 在纳米纤维素/还原氧化石墨烯复合气凝胶中，石墨烯可将纳米纤维素均匀包裹，形成三维多孔网络结构；纳米纤维素/还原氧化石墨烯复合电极具有良好的电化学性能，在1 mol/L的H2SO4溶液中，当电流扫描速率为1 mA/cm2时，超级电容器比面积电容高达1.621 F/cm2，且在2000次循环测试后，电容保留率为88.3％。结论 以纳米纤维素为基体制备的纳米纤维素/还原氧化石墨复合电极具有良好的电化学性能，可以用作超级电容器电极。 |
| 关键词: 气凝胶 纳米纤维素 石墨烯 对苯二酚 超级电容器 |
| DOI：10.19554/j.cnki.1001-3563.2019.15.015 |
| 分类号:TQ352 |
| 基金项目:国家自然科学基金（31770607） |
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| Preparation of Hydroquinone Reinforced CNFs/RGO Electrodes |
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CHEN Peng, XU Zhao-yang
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Nanjing Forestry University, Nanjing 210037, China
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| Abstract: |
| The work aims to prepare the cellulose nanofibers/reduced graphene oxide (CNFs/RGO) composite electrode film with CNFs aerogel as the skeleton, hydroquinone as the reinforcing phase and added with reduced graphene oxide, and to apply the film to the supercapacitor. CNFs/RGO solution was prepared by ultrasonic treatment. CNFs/RGO aerogel was prepared by hydrothermal synthesis and freeze-drying with hydroquinone added at high temperature and pressure, and the electrode film was finally made. In the CNFs/RGO composite aerogel, the graphene could evenly wrap the CNFs to form a three-dimensional porous network structure. The CNFs/RGO composite electrode had excellent electrochemical performance. In 1 mol/L H2SO4 solution, when the current scan rate was 1 mA/cm2, the specific area capacitance of the supercapacitor was as high as 1.621 F/cm2, and the capacitance retention rate was 88.3% after 2,000 cycles of testing. The CNFs/RGO composite electrode prepared with cellulose nanofibers as the substrate has excellent electrochemical performance and can be used as the supercapacitor electrode. |
| Key words: aerogel cellulose nanofibers grapheme hydroquinone supercapacitors |
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