Sacrificial Electrode Energy Storage for Metal Upcycling
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Solution Overview
Problem
Current systems for storing renewable energy, such as water electrolysis, are inefficient, costly, and do not provide additional benefits like water disinfection or valuable product synthesis, often relying on expensive catalysts and complex membranes, and face challenges with electrode corrosion and explosive gas mixtures.
Innovation Solution
A low-cost hydrogen generation system using inexpensive scrap metals like copper and zinc as electrodes, which facilitates electrode corrosion to produce hydrogen gas, disinfect water, and synthesize valuable nanomaterials, while being deployable in a single or multi-chamber vessel with a photovoltaic cell and acid or salt electrolyte solution, enabling water purification and energy storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional water electrolysis is used to store renewable energy, then hydrogen gas is produced, but the process is inefficient and requires expensive electrode catalysts like platinum
Solution Approach 1:
The patent replaces expensive, durable platinum catalysts with inexpensive, sacrificial metal electrodes (zinc, aluminum, iron) that are consumed during the process. These cheap electrodes undergo controlled corrosion to generate electrons for hydrogen production, eliminating the need for costly catalysts while maintaining system efficiency.
Solution Approach 2:
The patent changes the chemical parameters of the electrolyte system by using acidic electrolytes (pH 2-4) instead of neutral or alkaline conditions. This parameter change enables the use of sacrificial metal anodes that dissolve to provide electrons, fundamentally altering the electrolysis mechanism to improve efficiency and reduce costs.
2Ease of manufacture
If sacrificial metal electrodes are used to reduce electrolysis cost, then electrode corrosion is facilitated, but this traditionally considered wasteful process is actually beneficial
Solution Approach 1:
The patent converts the traditionally harmful effect of electrode corrosion into a beneficial process. The sacrificial anodes are designed to corrode deliberately, and this corrosion is the mechanism that generates electrons for hydrogen production. The 'waste' corrosion products (metal ions) are further utilized to synthesize valuable nanomaterials, turning what was considered a loss into a value-creating process.
Solution Approach 2:
The patent implements a system where sacrificial electrodes are discarded (consumed) during operation, but their corrosion products are recovered and upcycled into valuable nanomaterials. This approach transforms the loss of electrode material into an opportunity for producing high-value products, effectively recovering value from what would otherwise be waste.
3Productivity
If conventional electrolysis systems are used, then hydrogen is produced, but additional beneficial products like disinfected water or valuable nanomaterials are not generated
Solution Approach 1:
The patent transforms a single-function hydrogen production system into a multi-functional platform. The same electrolysis cell that produces hydrogen also generates disinfected water through metal ion-mediated pathogen inactivation and synthesizes valuable nanomaterials from electrode corrosion products. This multi-functionality increases productivity without proportionally increasing system complexity.
Solution Approach 2:
The system performs multiple functions using the same basic components and processes. The metal ions released during normal electrolysis operation automatically provide water disinfection without requiring additional equipment. Similarly, the corrosion products are in-situ converted into nanomaterials, eliminating the need for separate production lines for these valuable products.
4Reliability
If traditional electrolysis minimizes electrode corrosion, then electrode life is extended, but useful products cannot be synthesized and water cannot be disinfected
Solution Approach 1:
The patent inverts the traditional electrolysis approach by deliberately designing electrodes to corrode rather than protecting them from corrosion. Instead of using inert, durable electrodes that resist degradation, the system employs sacrificial electrodes whose controlled dissolution is the core mechanism for generating electrons, disinfecting water, and producing valuable nanomaterials.
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 system efficiently stores renewable energy, disinfects water, and produces valuable nanomaterials like tribasic copper chloride, offering a cost-effective and scalable solution for energy storage and water treatment, with a potential fourfold value upcycling of starting metals.
Implementation Method 1
connected to an external electric source, such as a photovoltaic cell
Implementation Method 2
The vessel includes an electrolyte solution
Implementation Method 3
Electrolysis of water is another common energy storage approach that stores generated electricity as hydrogen gas
Implementation Method 4
metal ions liberated from electrodes may serve a plurality of functions such as ion-mediated disinfection of microbial pathogens
Implementation Method 5
formation of oxidized metal-containing mineral precipitates that are of greater value and different functionalities than the starting metals alone
Data Source
AI summary
A device for generating hydrogen gas, treated water, and metal-containing nanoparticles. The device includes a vessel containing an electrolyte solution having a preferably iron anode and a preferably copper cathode. A renewable energy source is connected to the anode and the cathode. A valve for disbursing the hydrogen is connected to the hydrogen chamber.