Vanadium Electrolyte Reduction Without Additive Purification
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Solution Overview
Problem
The traditional method for producing vanadium electrolytes for vanadium batteries involves adding chemical additives to improve dissolution properties, which reduces purity and requires complex purification processes.
Innovation Solution
An electrolytic reduction system comprising a separating device and an electrolytic tank that separates vanadium pentoxide solid from sulfuric acid solution and reduces pentavalent vanadium ions to tetravalent and trivalent vanadium ions, eliminating the need for additional additives and purification steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If chemical additives are added to improve dissolution properties of vanadium solid, then dissolution properties are improved, but purity of electrolyte is reduced
Solution Approach 1:
The invention extracts and removes the harmful chemical additives from the electrolyte through a purification process. The purification unit specifically targets and removes organic impurities and metal impurities that were introduced during the dissolution process, thereby restoring electrolyte purity while maintaining the benefit of improved dissolution properties from the additives.
Solution Approach 2:
The invention discards the chemical additives after they have served their purpose of improving dissolution. The purification process eliminates the additives from the final electrolyte product, ensuring high purity while still benefiting from their temporary use during the dissolution phase. This allows the system to temporarily utilize additives for manufacturing ease, then remove them to achieve the desired purity level.
2Ease of manufacture
If chemical additives are added to improve dissolution properties, then dissolution properties are improved, but process complexity increases due to purification requirements
Solution Approach 1:
The purification process is segmented into distinct functional units: a filtration unit for removing solid particles, and a purification unit for removing dissolved impurities. This segmentation allows each unit to specialize in removing specific types of impurities, making the overall complex purification task more manageable and efficient. The segmentation also enables independent optimization of each purification stage.
Solution Approach 2:
The invention introduces a purification unit as an intermediary component between the dissolution process and the final electrolyte product. This intermediary specifically targets and removes organic and metal impurities without affecting the beneficial dissolution properties. The purification unit acts as a mediator that reconciles the conflict between using additives for ease of manufacture and achieving high purity, by selectively removing only the harmful components.
3Quantity of substance
If traditional electrolytic reduction method is used, then vanadium electrolyte can be produced, but production efficiency is low and process flow is complicated
Solution Approach 1:
The invention merges the dissolution process and the electrolytic reduction process into a single integrated system. The vanadium solid dissolution unit directly feeds into the electrolytic reduction unit, eliminating intermediate separation and purification steps. This merging of processes reduces the overall process flow complexity and improves production efficiency by allowing continuous operation without batch-wise processing interruptions.
Solution Approach 2:
The invention performs preliminary dissolution of vanadium solid into vanadium sulfate solution before the electrolytic reduction step. This preliminary action prepares the material in a suitable form for efficient electrolytic reduction, ensuring that the reduction process can proceed smoothly and rapidly. The preliminary dissolution ensures complete solubilization of vanadium, which facilitates faster and more efficient subsequent reduction to produce the final electrolyte.
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 effectively produces a vanadium electrolyte with improved efficiency and purity, reducing impurities in the sulfuric acid solution and simplifying the process flow, thereby enhancing the electrolytic reduction process.
Implementation Method 1
a separating device configured to separate a mixture consisting of a vanadium pentoxide solid and a sulfuric acid solution
Implementation Method 2
The electrolytic tank is configured to reduce the pentavalent vanadium ions in the vanadium solution to tetravalent vanadium ions and trivalent vanadium ions
Implementation Method 3
reducing the pentavalent vanadium ions by an electrolytic reduction reaction
Data Source
AI summary
Disclosed are an electrolytic reduction system of a vanadium electrolyte and a method for producing the electrolyte. The electrolytic reduction system includes a separating device and an electrolytic tank. The separating device is configured to separate a mixture consisting of a vanadium pentoxide (V2O5) solid and a sulfate acid solution, thereby obtaining a vanadium solution from a liquid discharging port of the separating device and a vanadium solid from a solid discharging port. The vanadium solution includes pentavalent vanadium ions. The electrolytic tank connects to the liquid discharging port of the separating device to contain the vanadium solution. In the method for producing the vanadium electrolyte, other chemical reagents are unnecessarily to be added into the mixture, and the vanadium solution is subjected to an electrolytic reduction process, such that the pentavalent vanadium ions are reduced to tetravalent vanadium ions and trivalent vanadium ions in the electrolytic tank.