All-Solid-State Supercapacitor Porous Electrolyte Interface
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Solution Overview
Problem
Conventional all-solid-state supercapacitors have limitations such as low specific capacitance, areal capacitance, and high internal resistance due to poor electrode-electrolyte interfacial area and complex fabrication strategies, which hinder their performance in energy storage applications.
Innovation Solution
The development of an all-solid-state supercapacitor with an enhanced electrode-electrolyte interface achieved by intercalating a solid-state polymer electrolyte within a conducting porous substrate coated with a conducting polymer or metal oxide material, utilizing 3D porous structures like carbon paper or graphene, and specific electrolyte materials like PVA-H2SO4, to increase interfacial area and reduce internal resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gel/plasticised electrolyte is used to replace liquid electrolyte, then safety issues are improved, but electrode-electrolyte interfacial area decreases resulting in poor charge storage properties
Solution Approach 1:
The patent employs porous carbon paper as the substrate and creates a porous gel electrolyte structure that penetrates into the pores of the carbon paper and electrode material. This porous architecture dramatically increases the electrode-electrolyte interfacial area, allowing the solid electrolyte to achieve both safety and high charge storage capacity simultaneously.
2Device complexity
If gel electrolyte is used as a film between electrodes, then device structure is simplified, but electrode-electrolyte interfacial area decreases resulting in high contact resistance
Solution Approach 1:
The gel electrolyte is formulated as a porous material that infiltrates the carbon paper substrate and electrode pores, creating an extensive three-dimensional network of contact points. This eliminates the need for additional interfacial layers while minimizing contact resistance through maximized interfacial area.
Solution Approach 2:
The gel electrolyte is nested within the porous structure of the carbon paper substrate and electrode material. This nested configuration allows the electrolyte to be embedded throughout the device architecture, providing continuous ionic pathways and reducing contact resistance without adding structural complexity.
3Ease of manufacture
If conventional all-solid-state supercapacitor fabrication is used, then device structure is achieved, but specific capacitance and areal capacitance remain low
Solution Approach 1:
The patent utilizes porous carbon paper as the foundational substrate and maintains its porous structure throughout fabrication. The gel electrolyte is impregnated into these pores, and the electrode material is deposited within the porous framework, creating maximum interfacial contact area that directly enhances specific and areal capacitance while using a straightforward fabrication process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach results in high specific capacitance, areal capacitance, and low internal resistance, enabling stable operation up to 10,000-12,000 cycles with 100% columbic efficiency, and energy density of 14.3 Wh/kg, while maintaining low leakage current and high integrity of the electrode-electrolyte interface.
Implementation Method 1
intercalation of solid electrolyte inside the conducting porous substrate
Implementation Method 2
energy storage systems such as batteries and supercapacitors, which store energy electrochemically
Implementation Method 3
Replacement of liquid electrolyte in the energy storage devices using a solid counterpart is very promising
Data Source
AI summary
The present invention discloses. all-solid-state supercapacitor (ASSP) with enhanced electrode-electrolyte interface which gives highest very high specific capacitance, areal capacitance and shows very low internal resistance (ESR). The invention particularly discloses the fabrication of all-solid-state supercapacitor by intercalation of solid state polymer electrolyte inside the conducting porous substrate coated with a charge storage electrode material to achieve the desired effect.