.png){kind=icon}
.png){kind=icon}
Return
High-energy-density and thermally stable cement-based supercapacitors through coupling ionic-liquid interfacial regulation with dual-continuous ionic pathways
.png){kind=icon}
PRE
AI
H
D
X
J
M
DOI：10.1016/j.jcis.2026.141350.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Energy storage is crucial for integrating renewable energy in buildings. Cement-based supercapacitors (CSCs) offer a viable platform for integrating structural integrity with electrochemical energy storage, yet their practical application is severely hindered by the narrow voltage window, interfacial limitations, and thermal instability of aqueous electrolytes. Here, we develop a CSC by coupling dual-continuous ionic pathways in a polyacrylamide-modified cement matrix with ionic-liquid interfacial regulation. Continuous pore/polymer ion-transport networks were constructed in the rigid cementitious matrix, followed by post-curing vacuum impregnation of a non-aqueous ionic liquid to regulate the electrolyte/porous electrode interface. This coupled design improves ion-transport continuity and enhances ion accessibility, driving the electrode utilization efficiency up to 84.7% at 1 mA cm-2. Enabled by the widened 2.0 V voltage window and high electrode utilization, the device achieves an areal capacitance of 1271.7 mF cm-2, and an areal energy density of 562.4 μWh cm-2. From 20 to 80 °C working temperature, the energy and power densities further increase by 52.7% and 13.0%, respectively, with negligible electrolyte loss. These results demonstrate that coupling ionic pathway design with interfacial regulation is an effective strategy for improving active-site accessibility, electrode utilization, and thermal robustness in rigid porous CSCs.
Keywords:
Cement-based supercapacitor
Ionic liquids
Interfacial regulation
Dual-continuous ionic pathways
Structural energy storage
Journal
IF:
9.7
Papers:
3.7W
Citations:
14.7W
Organization
Cited Papers