Lithium Nickel Cobalt Oxide Anode for Fluctuating Electrolysis Power
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Anodes for alkaline water electrolysis deteriorate when using electric power with large output fluctuations, such as renewable energy, leading to performance degradation and instability.
Innovation Solution
A conductive substrate coated with a first layer of lithium-containing nickel cobalt oxide (Li x Ni y Co 2 O 4 ) and optionally a second layer of catalysts like nickel cobalt spinel oxide or iridium oxide, formed through a thermal decomposition method, enhances stability and catalytic activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If renewable energy is used as a power source for alkaline water electrolysis, then cost reduction and sustainability are improved, but severe conditions such as extreme start-stop or load fluctuations cause performance deterioration of the nickel-based anode
Solution Approach 1:
The patent applies composite materials by combining nickel-based alloy substrate with lithium-containing nickel cobalt oxide catalyst layer. This composite structure provides both the electrical conductivity and catalytic activity needed for alkaline water electrolysis while enhancing stability under fluctuating renewable energy conditions. The lithium-containing nickel cobalt oxide layer protects the nickel substrate from degradation during start-stop cycles and potential fluctuations.
Solution Approach 2:
The patent changes the chemical composition parameters of the catalyst layer by incorporating lithium, nickel, and cobalt in specific ratios (Li:Ni:Co = 1:(1 to 20):(1 to 20)). This parameter optimization ensures the catalyst maintains high activity and stability under varying operating conditions including potential fluctuations from renewable energy sources, resolving the contradiction between adaptability and reliability.
2Ease of manufacture
If nickel-based material is used for anode, then cost is reduced compared to noble metals, but lifespan and stability under severe conditions are insufficient
Solution Approach 1:
The patent creates a composite anode structure where nickel-based alloy provides cost-effectiveness and electrical conductivity, while lithium-containing nickel cobalt oxide provides enhanced catalytic activity and durability. This composite approach maintains the cost advantage of nickel-based materials while significantly extending anode lifespan under severe operating conditions through the protective and catalytically active oxide layer.
Solution Approach 2:
The patent applies local quality by forming a catalyst layer with specific composition (lithium-containing nickel cobalt oxide) on the surface of the nickel-based alloy substrate. This localized treatment enhances the surface properties for catalysis and stability without changing the bulk material properties, maintaining cost-effectiveness while improving lifespan and performance under severe conditions.
3Productivity
If start-stop simulation test is conducted to assess anode material, then development speed is improved, but frequent output fluctuations accelerate performance deterioration
Solution Approach 1:
The patent applies preliminary action by conducting start-stop simulation tests during the development phase to pre-assess anode material durability under fluctuating conditions. This allows researchers to identify and correct material deficiencies before commercial deployment, accelerating development speed while ensuring the final product maintains high reliability under renewable energy conditions.
Solution Approach 2:
The patent uses feedback from start-stop simulation test results to optimize the catalyst layer composition and structure. By monitoring performance deterioration during simulated renewable energy operation, researchers can adjust the lithium-containing nickel cobalt oxide formulation to improve durability, thus accelerating development while ensuring long-term reliability.
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 anode maintains excellent electrolysis performance and catalytic activity over a long period, even with fluctuating power sources, reducing degradation and maintaining high efficiency.
Implementation Method 1
forming a first layer containing a lithium-containing nickel cobalt oxide by subjecting the conductive substrate coated with the aqueous solution to heat treatment
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
An anode for electrolysis in which electrolysis performance is less likely to deteriorate even when electric power having a large output fluctuation, such as renewable energy, is used as a power source and in which excellent catalytic activity is stably maintained for a long period of time is provided. The anode for electrolysis 10 includes a conductive substrate 2 in which at least a surface of the conductive substrate 2 is formed of nickel or a nickel-based alloy; and a first layer 4 formed on the surface of the conductive substrate 2, the first layer 4 being capable of functioning as a catalyst layer containing a lithium-containing nickel cobalt oxide represented by a composition formula LixNiyCo2O4 (0.05 ≤ × ≤ 1.0, 1.0 ≤ y ≤ 2.0, 1.0 ≤ z ≤ 2.0, and x + y + z = 2 to 3).