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Realizing higher-performance supercapacitor using three-dimensional cadmium-based coordination polymer
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DOI：10.1016/j.jallcom.2024.177894.png)
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Abstract
En 中文
In order to enhance energy density of supercapacitors, it is a route to develop new high-performance electrode materials. Coordination polymers (CPs) as the electrode materials of supercapacitors have received considerable attention, due to them owning redox active centers (metal ions/organic ligands) and the porosity, but developing high-performance and low-cost CP-based electrode materials remains a challenging task. Herein, a novel threedimensional (3D) cadmium-based CP [Cd(BGPD)(H2O)2] (Cd-CP; BGPD = N,N '-bis(glycinyl)pyromellitic diimide) with low-cost has been synthesized by a facile method. When served as an electrode material of super- capacitors, in a three-electrode system, the specific capacitance of Cd-CP is up to 1339 F g- 1 under 1 A g- 1 (equivalent to a specific capacity of 167 mAh g- 1 ). Notably, an asymmetrical supercapacitor, Cd-CP//rGO, as a two-electrode system constructed by the rGO electrode and the Cd-CP electrode, exhibits a superior energy density of 13.3 Wh kg- 1 at 0.80 kWkg-1, and a general cycle capability with the capacitance retention of 61.3% after 4000 cycles. Our work provides a new route for searching higher-performance electrode materials with lowcost and demonstrates the application potential of Cd-based CPs as the electrode materials of supercapacitors.
Keywords:
Supercapacitor
Cadmium compound
Coordination polymers
Electrode materials
Electrochemical performances
Journal
IF:
6.3
Papers:
8.3W
Citations:
24.3W