期刊
JOURNAL OF POWER SOURCES
卷 471, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2020.228472
关键词
MXene; Phthalocyanine; Energy density; Cyclic stability; Redox reactions
资金
- National Natural Science Foundation of China [21975116]
- Major Program of Guangdong Basic and Applied Research [2019B030302009]
- Shenzhen Science and Technology Innovation Committee [JCYJ20170412154426330]
- Guangdong Natural Science Funds for Distinguished Young Scholar [2016A030306042]
MXene based composites are promising candidates with a broad range of potential applications, especially in electrochemical energy storage and conversion devices. In this work, we demonstrate the preparation of a novel MXene/N-CuMe2Pc (non-peripheral octamethyl-substituted copper (II) phthalocyanine) based composite as the electrode material in supercapacitors. The integration of highly redox-active N-CuMe2Pc into MXene leads to the large surface area, which enhances the active sites for electrochemical redox reactions. For instance, composite prepared with a weight ratio of 1:0.2 of MXene:N-CuMe2Pc (M10P2) exhibits remarkable maximum specific capacitance of 786.1 F g(-1). The enhanced capacitance performance is attributed to the synergistic effect of water intercalated MXene layers and N-CuMe2Pc. The constructed M10P2 based symmetric supercapacitor shows excellent performance with a maximum energy density of 8.84 Wh kg(-1) with a power density of 112.3 W kg(-1). Additionally, the symmetric device exhibits outstanding cyclic stability (92.3%) even after 20,000 cycles with satisfactory Coulombic efficiency. This work proves the new insight of preparation of MXene/N-CuMe2Pc composites for high-performance next-generation supercapacitor sectors in the near future.
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