Solid Electrolyte Composition for Wide Potential Window Batteries
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Solution Overview
Problem
Conventional solid electrolyte batteries face challenges in achieving a wide potential window and high ionic conductivity, which limits their discharge capacity and operational efficiency.
Innovation Solution
A solid electrolyte composed of a compound represented by the formula AaEbGcXd, where A includes Li, Cs, or Ca, E includes Al, Sc, Y, Zr, Hf, and lanthanoids, G includes various oxide and sulfide groups, and X includes F, Cl, or Br, with specific mole ratios to enhance stability and conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional solid electrolytes are used, then the battery structure is simple, but the potential window is narrow and ionic conductivity is insufficient
Solution Approach 1:
The patent employs composite materials by combining multiple elements (Li, Cs, Ca with Al, Sc, Y, Zr, Hf, and lanthanoids) in specific ratios to create a solid electrolyte with enhanced ionic conductivity and widened potential window, resolving the contradiction between performance and composition simplicity
Solution Approach 2:
The patent applies parameter changes by optimizing the mole ratios of constituent elements (0.5≤a<1.5, 0<b≤0.5, 0<c≤0.5, 0<d≤0.5) to achieve the desired balance between ionic conductivity and potential window, transforming the electrolyte properties through compositional parameter adjustment
2Productivity
If conventional solid electrolytes are used, then the manufacturing process is simple, but the discharge capacity is limited
Solution Approach 1:
The patent optimizes manufacturing parameters by controlling the mole ratios of elements within specific ranges (0.5≤a<1.5, 0<b≤0.5, 0<c≤0.5, 0<d≤0.5) to enhance discharge capacity while maintaining manufacturability through systematic parameter control
3Reliability
If conventional solid electrolytes are used, then the internal resistance is high, but the electrolyte composition is simpler
Solution Approach 1:
The patent uses composite materials containing Li, Cs, or Ca combined with Al, Sc, Y, Zr, Hf, or lanthanoids in optimized ratios to reduce internal resistance and improve reliability, accepting increased formulation complexity as necessary for performance enhancement
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 solid electrolyte provides a wide potential window, high ionic conductivity, and large discharge capacity, enabling the solid electrolyte battery to operate efficiently with small internal resistance.
Implementation Method 1
the solid electrolyte having a wide potential window and a sufficiently high ionic conductivity
Data Source
AI summary
A solid electrolyte is composed of a compound represented by the following formula. AaEbGcXd (A is at least one element selected from Li and Cs. E is at least one element selected from the group consisting of Al, Sc, Y, Zr, Hf and lanthanoids. G is at least one group selected from the group consisting of OH, BO2, BO3, BO4, B3O6, B4O7, CO3, NO3, AlO2, SiO3, SiO4, Si2O7, Si3O9, Si4O11, Si6O18, PO3, PO4, P2O7, P3O10, SO3, SO4, SO5, S2O3, S2O4, S2O5, S2O6, S2O7, S2O8, BF4, PF6 and BOB. X is at least one element selected from the group consisting of F, Cl, Br and I. 0.5≤a<6, 0<b<2, 0.1<c≤6 and 0≤d≤6.1).