Anhydrous TMCCC with Methanol for Negative Electrochemical Potential
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Solution Overview
Problem
Cyanide-based transition metal compounds used as anodes in electrochemical cells have relatively high electrochemical reaction potentials, leading to low full cell voltages and energy densities, making them less attractive for energy-efficient applications.
Innovation Solution
Anhydrous transition metal cyanide coordination compounds (TMCCCs) with interstitial methanol instead of water are synthesized, achieving a more negative electrochemical potential and enhanced energy storage capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If water-synthesized TMCCC materials are used, then the electrochemical reaction potential is relatively high, but the full cell voltage and energy density are low
Solution Approach 1:
The patent changes the chemical composition parameter by replacing water with methanol as the synthesis solvent and interstitial molecule. This parameter change transforms the electrochemical reaction potential from relatively high (water-synthesized) to more negative (methanol-synthesized), thereby increasing full cell voltage and energy density while maintaining structural integrity of the TMCCC material
Solution Approach 2:
Methanol acts as an intermediary molecule that occupies interstitial sites in the TMCCC crystal structure. This intermediary substitution of water with methanol mediates the electrochemical properties, enabling more negative reaction potentials and enhanced energy storage capabilities without compromising the coordination polymer structure
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 anhydrous TMCCCs with methanol exhibit a more negative electrochemical reaction potential, increasing the voltage and energy density of electrochemical cells, addressing the limitations of water-synthesized materials.
Implementation Method 1
Anhydrous transition metal cyanide coordination compounds (TMCCCs) with interstitial methanol instead of water are synthesized, achieving a more negative electrochemical potential and enhanced energy storage capabilities
Data Source
AI summary
A system, method, and articles of manufacture for a surface-modified transition metal cyanide coordination compound (TMCCC) composition, an improved electrode including the composition, and a manufacturing method for the composition represented by AxMnyMkj[Mnm(CN)(6)]z.(Vac)(1−Z).n(CH3OH) wherein A includes one or more alkali metals; and each dopant M may include at least one independently selected alkaline earth metal, a post-transition metal, or a transition metal having an average valence j; including one or more Mn(CN)6 complexes each including an Mn atom; wherein (Vac) identifies a Mn(CN)6 vacancy; wherein each particular Mn(CN)6 complex includes the Mn atom bonded to a plurality of cyanide groups; and wherein CH3OH identifies methyl alcohol; and further including one or more crystal structures of the TMCCC composition.