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【Research Background】

In recent years, the rapid growth in the number and variety of portable electronic products has increased the demand for flexible and high-power density storage systems. For this reason, many light energy storage systems with flexible and high mechanical strength, such as metal ion batteries and super capacitors, have attracted widespread attention. Compared with other energy storage systems, SCs have the advantages of fast charge and discharge rate, high power density and reliable cycle life.

【Achievement Introduction】

Recently, professors Haiwon Lee and Min Jae Ko of Hanyang University in South Korea published a research paper titled In Situ Grown MWCNTs/MXenes Nanocomposites on Carbon Cloth for High-Performance Flexible Supercapacitors in the internationally renowned academic journal Advanced Functional Materials. The article designs and manufactures in-situ a high-performance flexible supercapacitor based on carbon paper, MXene and multi-wall carbon nanotubes.

【Graphic introduction】

Figure 1. Schematic diagram of preparation of MXene and multi-walled carbon nanotubes.

Figure 2. Scanning electron microscope image.

Figure 3. Transmission electron microscope image.

Figure 4. Physical characterization of materials.

Figure 5. Electrochemical performance test of composite electrode.

Figure 6. Electrochemical performance of symmetric supercapacitors.

Figure 7. Physical and chemical stability of MWCNT-MXene@CC electrode.

【Summary of this article】
In summary, we show a new strategy for preparing unbonded electrodes based on multi-walled carbon nanotubes grown in situ on MXene based on NiAl catalysts. The flexible electrode exhibits an excellent area specific capacitance of 114.58 mF cm−2 at a scan rate of 5 mV s−1, and has excellent cycle stability of 16,000 cycles. The significant enhancement of electrochemical performance is attributed to the support of multi-heat-sealed carbon nanotubes between MXene layers. As a conductive gasket, MWCNT effectively maintains the hierarchical structure of the electrolyte and enhances the accessibility of electrolyte ions. In addition, the grown multi-walled carbon nanotubes also act as highly conductive current collectors between the MXene particles, thereby reducing the internal resistance of the electrode.

Literature link:

DOI: 10.1002/adfm.202002739



Source: MXene Frontie

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