期刊
RESEARCH
卷 2020, 期 -, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.34133/2020/7304767
关键词
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资金
- Fundamental Research Funds for the Central Universities, Key Research and Development Program of Shaanxi [2020KWZ-001, 2020GXLH-Z-027, 2020ZDLGY04-08]
- National Natural Science Foundation of China [51902265]
- Natural Science Foundation of Shaanxi Province [2019JQ-613, 2017JM1013]
- Astronautics Supporting Technology Foundation of China [2019-HT-XG]
- Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University [CX202065]
- Project for Graduate Innovation Team of the Northwestern Polytechnical University
- Analytical and Testing Center of the Northwestern Polytechnical University
With the fast bloom of flexible electronics and green vehicles, it is vitally important to rationally design and facilely construct customized functional materials with excellent mechanical properties as well as high electrochemical performance. Herein, by utilizing two modern industrial techniques, digital light processing (DLP) and chemical vapor deposition (CVD), a unique 3D hollow graphite foam (HGF) is demonstrated, which shows a periodic porous structure and robust mechanical properties. Finite element analysis (FEA) results confirm that the properly designed gyroidal porous structure provides a uniform stress area and mitigates potential structural failure caused by stress concentrations. A typical HGF can show a high Young's modulus of 3.18 MPa at a low density of 48.2 mg cm(-3). The porous HGF is further covered by active MnO2 material with a high mass loading of 28.2 mg cm(-2) (141 mg cm(-3)), and the MnO2/HGF electrode still achieves a satisfactory specific capacitance of 260 F g(-1), corresponding to a high areal capacitance of 7.35 F cm(-2) and a high volumetric capacitance of 36.75 F cm(-3). Furthermore, the assembled quasi-solid-state asymmetric supercapacitor also shows remarkable mechanical properties as well as electrochemical performance.
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