Porous Transition-Metal Phosphosulfide Electrode Structure for Stable Capacity
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Solution Overview
Problem
Current secondary battery technologies face challenges in achieving cost-effectiveness, energy density, and stability for medium to large-sized energy storage applications, particularly in electric vehicles and energy storage systems, with existing electrodes lacking in low fabrication costs, simple processes, and enhanced electrochemical properties such as ORR, OER, and HER.
Innovation Solution
A method for manufacturing an electrode structure using precursors with chalcogen elements, phosphorus, and transition metals, involving a suspension reaction and heat-treatment under pressure to form a membrane of fibrillated fibers with a sponge structure, which includes a compound of transition metals, sulfur, and phosphorus, allowing for controlled electrochemical properties and reduced costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrode materials and processes are used, then fabrication costs are high and processes are complex, but electrochemical properties (ORR, OER, HER) are insufficient
Solution Approach 1:
The patent employs composite materials consisting of transition metal compounds (such as copper, cobalt, nickel, or their oxides, hydroxides, or sulfides) combined with phosphorus-containing compounds and chalcogen elements. This composite structure enables the electrode to achieve enhanced ORR, OER, and HER properties while maintaining cost-effectiveness and simplifying the fabrication process, as the synergistic interaction between components provides multiple electrochemical functions simultaneously.
Solution Approach 2:
The patent utilizes parameter changes by controlling the oxidation states, crystal structures, and compositional ratios of transition metal compounds during synthesis. By adjusting parameters such as heat treatment temperature, pressure, and precursor ratios, the electrode achieves optimized electrochemical performance for ORR, OER, and HER reactions while maintaining a simple and cost-effective manufacturing process.
2Use of energy by moving object
If existing electrode structures are used, then energy density is limited, but stability and lifespan are insufficient
Solution Approach 1:
The patent employs porous electrode structures with controlled porosity to increase surface area and accommodate volume changes during charge-discharge cycles. The porous architecture enhances energy density by providing more active sites for electrochemical reactions while maintaining structural stability and extending electrode lifespan through stress distribution and prevention of material degradation.
3Reliability
If lithium-based materials are used, then electrochemical performance is improved, but fabrication costs and safety concerns increase
Solution Approach 1:
The patent replaces expensive lithium-based materials with cost-effective transition metal compounds (copper, cobalt, nickel, zinc, calcium, or their oxides, hydroxides, sulfides) combined with phosphorus and chalcogen elements. These alternative materials provide comparable electrochemical performance for ORR, OER, and HER reactions while significantly reducing fabrication costs and eliminating safety concerns associated with lithium handling and processing.
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 electrode structure exhibits improved electrochemical properties, increased charge/discharge capacity, and extended life, while being fabricated at lower costs and using non-lithium metal compounds, thus addressing the limitations of existing technologies.
Implementation Method 1
adding a reducing agent to the suspension and causing a reaction therebetween to produce an intermediate product
Implementation Method 2
adding the intermediate product and a surfactant to a second solvent and heat-treating under pressure, so as to manufacture an electrode structure
Data Source
AI summary
Provided is a method for manufacturing an electrode structure. The method for manufacturing an electrode structure may comprise the steps of: preparing a first precursor having a chalcogen element, a second precursor having phosphorus, and a third precursor having a transition metal; preparing a suspension by mixing the first precursor, the second precursor, and the third precursor in a first solvent; adding a reducing agent to the suspension and causing a reaction therebetween to produce an intermediate product; and adding the intermediate product and a surfactant to a second solvent and heat-treating under pressure, to thereby manufacture an electrode structure comprising the chalcogen element, the phosphorus, and the transition metal.