Effect of Recycled Fine Powder on Performance of Porous Magnesium Phosphate Cement-Based Supercapacitors

doi:10.16552/j.cnki.issn1001-1625.2025.0855

Abstract

Abstract: Porous magnesium phosphate cement exhibits exceptional sulfate resistance, rendering it highly advantageous for developing cement-based energy storage systems accommodating high-capacity and complex electrode materials. However, the ion transport kinetics within porous magnesium phosphate cement electrolytes are significantly constrained by the stochastic pore architecture formed during hydration, characterized by high randomness and tortuosity. This study modifies the pore structure of porous magnesium phosphate cement-based electrolytes by introducing recycled fine powder and investigates the effect of recycled fine powder on the performance of porous magnesium phosphate cement-based supercapacitors. The results demonstrate that incorporating 40% (mass fraction) recycled fine powders triples the ionic conductivity of the porous magnesium phosphate cement electrolyte, achieving 21.4 mS/cm, while also boosting the energy storage potential of magnesium phosphate cement-based supercapacitors at current densities of 1.0 and 2.0 A/g.This work provides a viable technical pathway for advancing high-performance magnesium phosphate cement-based electrochemical energy storage devices through sustainable waste valorization.

Key words: magnesium phosphate cement, supercapacitor, recycled powder, pore structure, ion transport

CLC Number:

TQ17

CAI Qiang, LIU Yisong, GUO Junyuan, WU Kai. Effect of Recycled Fine Powder on Performance of Porous Magnesium Phosphate Cement-Based Supercapacitors[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(11): 4220-4226.

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