Prussian Blue Intercalation Electrodes for Divalent Ion Softening
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Solution Overview
Problem
Existing water softening systems are inefficient and energy-intensive, particularly for municipal water desalination, and lack materials that effectively intercalate divalent ions like Ca2+ and Mg2+ with sufficient capacity, lifetime, and selectivity.
Innovation Solution
Employing binary and ternary transition metal Prussian blue analogue compounds as intercalation materials, specifically in the form of electrodes, to selectively remove divalent ions such as Ca2+ and Mg2+ from water using intercalation hosts with longer life cycles and higher efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional water softening systems are used, then water treatment can be achieved, but energy consumption is high and efficiency is low
Solution Approach 1:
The patent changes the chemical parameters of the electrode materials by using Prussian blue analogue compounds with specific compositions (AxByCz[Fe(CN)6] and AxByCzDw[Fe(CN)6] formulas) to optimize ion intercalation capacity and selectivity, thereby improving water softening efficiency while reducing energy consumption
Solution Approach 2:
The patent employs composite intercalation materials comprising binary transition metal Prussian blue analogues and ternary transition metal Prussian blue analogues with specific metal combinations (Mn, Fe, Ni, Cu, Zn) to achieve enhanced divalent ion removal capacity and selective adsorption properties
2Reliability
If conventional intercalation materials are used, then ion removal can be achieved, but selectivity for divalent ions (Ca2+, Mg2+) is insufficient
Solution Approach 1:
The patent applies local quality by designing Prussian blue analogue materials with specific metal compositions at different sites (A, B, C, D positions in the formula) to create localized regions with different affinities for divalent ions, enhancing both selectivity and capacity for Ca2+ and Mg2+ removal
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 use of Prussian blue analogue compounds enhances the efficiency and reduces energy consumption in water softening processes by selectively removing divalent ions, offering a sustainable and effective solution for municipal water desalination.
Implementation Method 1
binary and ternary transition metal Prussian blue analogue compounds... selectively remove divalent ions such as Ca2+ and Mg2+ from water using intercalation hosts
Implementation Method 2
The device is configured to use a power supply configured to apply a current to the first and second intercalation electrodes such that the first and second intercalation electrodes reversibly store and release ions from the solution
Data Source
AI summary
An electrode for use in a device configured to remove ions from a solution. The electrode includes an intercalation material including a binary transition metal Prussian blue analogue compound, a ternary transition metal Prussian blue analogue compound, or a combination thereof. The binary compound may have a general formula: AxByCz[Fe(CN)6], where A=Li, Na, or K; B=Mn, Fe, Ni, Cu, or Zn; C=Mn, Fe, Ni, Cu, or Zn; 0≤x≤1; 0≤y≤1; and 0≤z≤1. The ternary compound may have the general formula: AxByCzDw[Fe(CN)6], where A=Li, Na, or K; B=Mn, Fe, Ni, Cu, or Zn; C=Mn, Fe, Ni, Cu, or Zn; D=Mn, Fe, Ni, Cu, or Zn; 0≤x≤1; 0≤y≤1; 0≤z≤1; 0≤w≤1.