High-Purity Carbon Electrodes with Electrochemical Modifiers
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Solution Overview
Problem
Conventional carbon materials used in hybrid energy storage devices suffer from limited active life and power performance due to impurities and low surface area, leading to electrode deterioration and reduced capacity.
Innovation Solution
Development of novel carbon materials with high purity and high surface area, incorporating electrochemical modifiers like lead or zinc, which are synthesized through a sol-gel process to enhance electrode stability and power performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional carbon materials are used in hybrid energy storage devices, then the devices can be manufactured with existing materials, but the active life and power performance are limited due to impurities and low surface area
Solution Approach 1:
The patent changes the purity parameter of carbon materials from conventional levels (containing impurities) to ultra-high purity (99.9% or higher), removing impurities that cause electrode deterioration. This parameter change directly resolves the contradiction by improving active life through higher purity while establishing a new manufacturing standard for carbon material production.
Solution Approach 2:
The patent creates composite carbon materials by combining ultra-high purity carbon with electrochemical modifiers (metals or metal compounds) to form a new composite structure. This composite approach improves both reliability (through purity) and power performance (through enhanced surface area and modified electrochemical properties) while resolving the limitations of conventional carbon materials.
2Power
If conventional carbon materials with low surface area are used, then the manufacturing process is simpler, but the power performance is limited due to high ion migration distances
Solution Approach 1:
The patent employs porous carbon materials with controlled pore structures to dramatically increase surface area while managing complexity. The porous structure provides numerous pathways for ion transport, reducing ion migration distances and improving power performance. The pore size and distribution are optimized to balance surface area enhancement with manufacturing feasibility.
Solution Approach 2:
The patent transitions from two-dimensional surface considerations to three-dimensional porous structures, utilizing the depth and volume of the carbon material to create extensive internal surface areas. This dimensional approach allows ions to access active sites through pore networks rather than traveling across large external surfaces, improving power performance without excessive complexity.
3Area of stationary object
If carbon materials with high porosity are developed, then the surface area increases improving power performance, but the manufacturing capability is insufficient to produce such materials
Solution Approach 1:
The patent employs preliminary templating approaches where pore-forming agents or structures are introduced during carbon material synthesis, creating the desired porous architecture before the final carbon structure is formed. This preliminary action enables precise control over pore size, distribution, and surface area while maintaining manufacturing feasibility through established chemical vapor deposition or pyrolysis processes.
Solution Approach 2:
The patent uses intermediary substances or processes (such as templating agents, catalysts, or intermediate carbon structures) to facilitate the creation of high-surface-area porous materials. These intermediaries guide the formation of desired pore structures during synthesis and can be removed or transformed in subsequent processing steps, making the manufacture of complex porous structures more accessible.
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 high-purity carbon materials with integrated electrochemical modifiers exhibit improved active life and power performance by providing close proximity of the active material to the electrolyte, reducing ion migration distances and allowing for higher active material loading, thus enhancing the overall performance of energy storage devices.
Implementation Method 1
incorporating electrochemical modifiers like lead or zinc, which are synthesized through a sol-gel process
Data Source
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AI summary
The present application is directed to carbon materials comprising an electrochemical modifier. The carbon materials find utility in any number of electrical devices, for example, in lead acid batteries. Methods for making the disclosed carbon materials are also disclosed.