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Updated: Oct 24, 2025
Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
Published on: January 7, 2022
Tin-based metal-phosphine complexes nanoparticles as long-cycle life electrodes for high-performance hybrid
Chengyu Yang1, Lvyin Hong1, Peidian Chong1
1Fujian Key Laboratory of Electrochemical Energy Storage Materials, Fuzhou University, Fuzhou, Fujian 350002, China.
Abstract:
New tin-based metal-phosphine complexes of [Sn(OH)4(PPh3)2] and [Sn(OH)2(PPh3)2] have been successfully synthesized and used as supercapacitor electrodes for the first time, exhibiting a high specific capacitance, a good rate capability, and an excellent cycling stability. The specific capacitances (highest specific capacitance for tin-based materials) of 1204F g-1 and 764F g-1 for two samples at a current density of 1 A g-1 in 6 M KOH can respectively be achieved, and their capacitance retention remained at 95.1% and 89.2% even after 15,000 cycles at a current density of 10 A g-1. Furthermore, a flexible quasi-solid-state asymmetric supercapacitor composed of Sn(OH)2(PPh3)2 and activated carbon was assembled and exhibited a specific capacitance of 290.6 mF cm-2 at a current density of 1 mA cm-2. More importantly, this device also displayed excellent cyclic stability of ∼100% for 1800 cycles during the galvanostatic charge/discharge process at 5 mF cm-2.
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