Preparation of nitrogen-doped biomass-derived carbon nanofibers/graphene aerogel as a binder-free electrode for high performance supercapacitors
Preparation of nitrogen-doped biomass-derived carbon nanofibers/graphene aerogel as a binder-free electrode for high performance supercapacitors
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DOI：
10.1016/j.apsusc.2017.07.127
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发表时间：
2017-12
影响因子：
6.7
通讯作者：
Yimei Zhang;Fei Wang;Hao Zhu;Hao Zhu;Lincheng Zhou;Lincheng Zhou;Xinliang Zheng;Xinghua Li
中科院分区：
文献类型：
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作者：
Yimei Zhang;Fei Wang;Hao Zhu;Hao Zhu;Lincheng Zhou;Lincheng Zhou;Xinliang Zheng;Xinghua Li
源自各种生物质的碳材料以其资源丰富、成本低廉、环境友好、易于制备而引起了科学界的强烈兴趣。在此，开发了该方法来制备氮掺杂生物质衍生的碳纳米纤维/石墨烯气凝胶（NCGA）作为超级电容器的无粘合剂电极。选择乙二胺（EDA）作为氮源，其含氮量高，与氧化石墨烯（GO）和纤维素纳米纤维（CNFs）相互作用强，通过水热自组装方法形成杂化水凝胶，最后通过冷冻干燥和碳化转化为NCGA。碳化后，绝缘 CNF 转化为高导电性碳纳米纤维。 NCGA 电极在 5 mV s−1 下表现出 289 F g−1 的高比电容，并且在 3 A g−1 下 5000 次循环后具有 90.5% 的高稳定性。这种新型生物质电极可能是高性能超级电容器的潜在候选者。
Carbon materials derived from various biomasses have aroused forceful interest from scientific community based on their abundant resource, low cost, environment friendly and easy fabrication. Herein, the method has been developed to prepare nitrogen-doped biomass-derived carbon nanofibers/graphene aerogel (NCGA) as the binder-free electrode for supercapacitors. Ethylenediamine (EDA) is select as nitrogen source for its high nitrogen content and strong interaction with graphene oxide (GO) and cellulose nanofibers (CNFs) via hydrothermal self-assembly method to form hybrid hydrogel, and finally converts to NCGA by freeze-drying and carbonization. After carbonization the insulated CNFs converted to high conductivity carbon nanofibers. The NCGA electrode exhibits a high specific capacitance of 289 F g−1at 5 mV s−1and high stability of 90.5% capacitance retention ratio after 5000 cycles at 3 A g−1. This novel biomass electrode could be potential candidate for high performance supercapacitors.