Fiber Electrodes Mesostructured on Carbon Fibers for Energy Storage
- Kim, Jisu; Kang, Jin Gu; Choi, Jaewon; Braun, Paul V.; Kim, Sung-Kon
- Issue Date
- AMER CHEMICAL SOC
- fiber electrode; micro-supercapacitor; energy storage; carbon fiber; colloidal crystal
- ACS APPLIED ENERGY MATERIALS, v.4, no.12, pp.13716 - 13724
- Journal Title
- ACS APPLIED ENERGY MATERIALS
- Start Page
- End Page
- Herein, we demonstrate the formation of fiber electrodes on a carbon fiber (CF) bundle with a surface that is mesostructured by single-walled carbon nanotubes via colloidal self-assembly. The three-dimensional ordered structure of the fiber electrodes (M-CNT@CF) provides porosity and bicontinuous paths for charge transport, resulting in high energy and considerable rate retention capability as compared with non-structured CF and CNT-coated CF electrodes. A fiber microsupercapacitor (f-MSC) composed of a twisted pair of fiber electrodes with a solid polymer electrolyte shows significant capacitance (355 mF cm(-3)), rate retention capability (92% of low-current capacitance), and considerable cycle stability (99% retention of initial capacitance) for at least 7000 charge-discharge cycles and even under severe mechanical stress. In particular, M-CNT@CF is a promising template for active materials experiencing a Faradic reaction, such as manganese oxide (MnO2). As an added benefit of MnO2 plating, the capacitance of the resulting hybrid fiber electrodes (MnO2@M-CNT@CF) is 6.6 times greater than that of M-CNT@CF. This also demonstrates that the MnO2 plating significantly contributes to performance improvement when applied to the mesostructured electrode (M-CNT@CF) rather than a nonporous material (CF).
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- 자연과학대학 > 화학과 > Journal Articles
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