| Enhancing the electrochemical performance of Portland cement supercapacitor by decorating electrolyte with metal salt solution |
| Na Chen1,2, Jun Liu1, Yunpeng Cui1, Yuanquan Yang1, Runqing Liu1 |
1School of Materials Science and Engineering, Shenyang Ligong University, Shenyang, 110159, Liaoning, China
2School of Materials Science and Engineering, Yingkou Institute of Technology, Yingkou, 115014, Liaoning, China |
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Received: August 10, 2023; Revised: October 30, 2023 Accepted: November 7, 2023. Published online: December 6, 2023. |
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| ABSTRACT |
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The design of high-performances Portland cement supercapacitors requires electrolytes with high ionic conductivity and capacitance. Herein, we presented a novel electrolyte which is directly mixed with Portland cement by a one-step process of nano carbon powder and barium chloride solution (BaCl2). The microstructure, mechanical properties and electrochemical properties of the Portland cement electrolyte were studied with different concentrations of barium chloride solution. It was found that the CBa-1.0 mol/L Portland cement electrolyte showed the best multifunctional properties with an ionic conductivity of 15.15 mS/cm and a compressive strength of 23.47 MPa. The obtained Portland cement electrolytes were also assembled with copper mesh into supercapacitors, which exhibited a highest volumetric specific capacitance of 266.47 mF/cm3 at a current density of 1 mA/cm2. The capacity retention ratio of it reached 96.39% after 100 galvanostatic charge and discharge cycles. The cost-effective and convenient method demonstrated in this paper can coordinate the control of the electrochemical properties and mechanical properties, which may provide an example for improving the electrolytes for the application of Portland cement supercapacitors. |
| Key words:
Supercapacitor · Portland cement electrolyte · Barium chloride · Electrochemical performance |
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