Porous Carbon-Conductive Polymer Composite Electrode
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Solution Overview
Problem
Existing electrode materials for electrochemical elements, such as lithium ion secondary batteries and electric double-layer capacitors, do not achieve optimal electrostatic capacitance when scaled up for production.
Innovation Solution
A carbon material with a specific surface area of 750 to 3000 m2/g, methylene blue adsorption performance of 150 mL/g or more, and a Raman spectrum with at least three peaks in the 1250 to 1700 cm−1 range, combined with a conductive polymer, is used as the electrode material to enhance electrostatic capacitance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional electrode materials are used for scaled-up production, then manufacturing cost is reduced, but electrostatic capacitance is insufficient
Solution Approach 1:
The patent uses a composite material consisting of porous carbon particles and conductive polymer particles. The porous carbon provides high surface area for charge storage, while the conductive polymer enhances electron transport. This composite structure achieves high electrostatic capacitance in scaled-up production by combining the advantages of both materials without requiring complex manufacturing processes.
Solution Approach 2:
The patent specifies using porous carbon particles with a specific surface area of 0.5 to 3.0 cm³/g. The porous structure provides extensive surface area for electrostatic charge accumulation, directly improving electrostatic capacitance. The pore structure also facilitates electrolyte penetration and ion transport, enhancing overall performance in scaled-up electrochemical elements.
2Quantity of substance
If high surface area carbon material is used, then electrostatic capacitance is improved, but charging and discharging speed may be reduced
Solution Approach 1:
The patent merges porous carbon particles with conductive polymer particles to create a composite where the porous carbon provides high surface area for charge storage and the conductive polymer provides rapid electron transport pathways. This combination resolves the contradiction by enabling both high electrostatic capacitance and fast charging/discharging speeds simultaneously.
Solution Approach 2:
The conductive polymer acts as an intermediary between the porous carbon particles and the electrolyte. It facilitates rapid electron transport from the carbon surface to the current collector, preventing the high surface area carbon material from becoming a bottleneck for charge transfer, thus maintaining fast charging and discharging speeds.
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
The carbon material with specific properties and a conductive polymer composite achieves higher electrostatic capacitance in electrochemical elements, maintaining semi-permanent and high-speed charging and discharging properties.
Implementation Method 1
methylene blue adsorption performance of 150 mL/g or more
Implementation Method 2
obtained by bonding the conductive polymer to the surface of the porous carbon material
Implementation Method 3
after mixing the conductive polymer and the porous carbon material, undoping by heat treatment at a temperature at least 20° C. lower than the decomposition temperature of the conductive polymer
Data Source
AI summary
A method of manufacturing a carbon material comprising a composite of a porous carbon material and a conductive polymer, in which a dispersion solution of the porous carbon material and a dispersion solution of the conductive polymer are mixed to make the composite of the porous carbon material and the conductive polymer. The carbon material has: a specific surface area of 750 to 3000 m2/g, a methylene blue adsorption performance of 150 mL/g or more, and at least three peaks in a range 1250 to 1700 cm−1 of a spectrum obtained by laser Raman spectroscopy with an excitation wavelength of 532 nm.