Metal Nanocluster Aqueous Battery for Low-Overvoltage CO2 Conversion
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Solution Overview
Problem
Existing methods for converting carbon dioxide to carbon monoxide using electrochemical catalysts face challenges such as high energy consumption and limited selectivity, particularly with polycrystalline metal catalysts, and suffer from high overvoltage requirements and inefficient energy use.
Innovation Solution
An aqueous primary battery system incorporating a metal nanocluster catalyst, where the cathode includes a porous support with metal nanoclusters and an anode made of aluminum or zinc, operates without external power, minimizing resistance and preventing ion crossover through a zero-gap structure and electrolyte supply spacers, enabling spontaneous conversion of carbon dioxide to carbon monoxide at high current densities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If polycrystalline metal catalysts are used for carbon dioxide conversion, then the catalyst structure is simple and easy to manufacture, but high overvoltage is required and catalytic activity is not excellent
Solution Approach 1:
The patent changes the physical parameter of the catalyst from polycrystalline metal to metal nanoclusters, which fundamentally alters the electronic structure and surface properties. This parameter change enables the catalyst to achieve high catalytic activity with low overvoltage, resolving the contradiction between manufacturing simplicity and power efficiency.
Solution Approach 2:
The patent employs composite material structures by combining metal nanoclusters with specific ligands and support materials. This composite approach enhances the catalytic activity while maintaining structural stability, allowing the system to operate at lower overvoltages compared to simple polycrystalline metals.
2Reliability
If conventional electrochemical conversion methods are used for carbon dioxide, then the process is established and reliable, but energy consumption is high due to high voltage requirements
Solution Approach 1:
The patent changes the electrochemical parameters by using metal nanocluster catalysts that operate at lower potentials. This parameter change reduces the energy input required for carbon dioxide conversion while maintaining process reliability through the stable nanocluster structure and optimized electrolyte conditions.
3Device complexity
If conventional batteries using zinc or aluminum anodes are used for carbon dioxide conversion, then the battery structure is established, but energy consumption for reducing oxidized metal in the anode is very high
Solution Approach 1:
The patent implements a self-service mechanism where the battery system automatically manages the reduction of oxidized metal in the anode through the electrochemical reactions. The metal nanocluster catalyst facilitates efficient electron transfer, enabling the anode material to be reduced and reused within the battery cycle, thereby reducing external energy input requirements.
4Productivity
If existing electrochemical conversion methods are used for carbon dioxide, then the conversion process can be performed, but selectivity for carbon monoxide is limited
Solution Approach 1:
The patent applies local quality enhancement by designing metal nanoclusters with specific atomic arrangements and electronic structures that are locally optimized for carbon monoxide production. The nanocluster surface sites are engineered to preferentially adsorb and convert carbon dioxide to carbon monoxide, achieving high selectivity while maintaining productivity.
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 achieves efficient and economical conversion of carbon dioxide to carbon monoxide with high selectivity and reduced energy consumption, utilizing metal nanoclusters that enhance catalytic activity and stability, and allows for the recycling of metal oxides, thus improving battery performance and industrial applicability.
Implementation Method 1
the cathode includes a metal nanocluster catalyst
Implementation Method 2
conversion of carbon dioxide to carbon monoxide
Implementation Method 3
a first electrolyte solution that is an aqueous electrolyte accommodated in a first reaction space... a second electrolyte solution that is an aqueous electrolyte accommodated in the second reaction space
Implementation Method 4
an anode made of a metal material in contact with the second electrolyte solution
Data Source
AI summary
The present invention provides an aqueous primary battery for carbon dioxide conversion containing a metal nanocluster catalyst, and a carbon dioxide conversion method capable of spontaneously converting carbon dioxide using the same even at high current density without the need for external power.