Boosting the Capacitive Performance of Cobalt(II) Phthalocyanine by Non-peripheral Octamethyl Substitution for Supercapacitors†
Minzhang Li
School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001 China
Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China
Search for more papers by this authorRajendran Ramachandran
Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China
Search for more papers by this authorYu Wang
Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China
Search for more papers by this authorQian Chen
Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China
Search for more papers by this authorCorresponding Author
Zong-Xiang Xu
Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China
Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China
E-mail: [email protected]Search for more papers by this authorMinzhang Li
School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001 China
Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China
Search for more papers by this authorRajendran Ramachandran
Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China
Search for more papers by this authorYu Wang
Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China
Search for more papers by this authorQian Chen
Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China
Search for more papers by this authorCorresponding Author
Zong-Xiang Xu
Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China
Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China
E-mail: [email protected]Search for more papers by this author† Dedicated to Department of Chemistry, SUSTech, on the Occasion of her 10th Anniversary.
Main observation and conclusion
In this paper, pristine cobalt(II) phthalocyanine (CoPc) and non-peripheral octamethyl substituted CoPc (N-CoMe2Pc) are the focus of electrochemical investigation. CoPc and N-CoMe2Pc nanorods (NR) were synthesized by a facile precipitation process from sublimated bulk phthalocyanine powders and their electrochemical properties were explored. Due to the large specific surface area, the capacitance performance of the nanorods was significantly higher than that of the sublimated powder sample. N-CoMe2Pc powder exhibited better pseudocapacity compared with CoPc powder and CoPc NR, which is attributed to enhanced charge transfer rate and improved redox activity after the introduction of octamethyl substituents on phthalocyanine ring. The maximum specific capacitance value was achieved by N-CoMe2Pc NR based electrode, exhibiting 210.2 F g–1 capacitance at 5 mV s–1 scan rate and 156.1 F g–1 at 0.25 A g-1 current density, and also showing high efficiency and satisfactory retention. These results indicate that according to proper molecular design, N-CoMe2Pc NR could be applied as the potential candidate for electrode material in supercapacitors.
Supporting Information
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Appendix S1: Supporting Information |
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