Oxide-Modified Solid Electrolyte for Low Halogenated Gas Emission
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Solution Overview
Problem
Solid electrolyte materials generate halogenated hydrogen gas during battery manufacturing, requiring expensive dehumidification to maintain low dew points, increasing manufacturing costs and complicating the process.
Innovation Solution
A solid electrolyte material comprising Li, M, O, and X, where M is Nb, Ta, or Zr, and X is F, Cl, Br, or I, combined with an oxide material, such as ZnO, to form a complex that absorbs and reduces halogenated hydrogen gas generation, allowing for higher dew point manufacturing and reduced costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solid electrolyte material is used, then lithium ion conductivity is improved, but halogenated hydrogen gas is generated during manufacturing
Solution Approach 1:
An oxide material is introduced as an intermediary substance between the solid electrolyte and the environment. This oxide material reacts with the halogenated hydrogen gas generated during manufacturing, effectively neutralizing the harmful gas and allowing the solid electrolyte to maintain its high lithium ion conductivity without causing manufacturing issues
2Object-generated harmful factors
If dehumidification is implemented to suppress halogenated hydrogen gas, then gas generation is reduced, but manufacturing cost increases
Solution Approach 1:
The oxide material serves as a disposable, low-cost reagent that can be easily added during manufacturing. It reacts with and neutralizes the halogenated hydrogen gas without requiring expensive dehumidification equipment or complex process controls, significantly reducing manufacturing costs while effectively suppressing harmful gas generation
3Object-generated harmful factors
If dehumidification equipment is added to control gas generation, then halogenated hydrogen gas is suppressed, but device complexity increases
Solution Approach 1:
The harmful function of halogenated hydrogen gas generation is extracted and isolated by introducing the oxide material. This simple additive approach eliminates the need for complex dehumidification equipment or process control systems, maintaining manufacturing simplicity while effectively suppressing gas generation
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 solution effectively decreases halogenated hydrogen gas production, enabling battery manufacturing at higher dew points and reducing costs while maintaining high lithium ion conductivity and charge/discharge efficiency.
Implementation Method 1
an oxide material, such as ZnO, to form a complex that absorbs and reduces halogenated hydrogen gas generation
Data Source
AI summary
A solid electrolyte material includes a solid electrolyte and an oxide material. The solid electrolyte includes Li, M, O, and X. M is at least one selected from the group consisting of Nb, Ta, and Zr. X is at least one selected from the group consisting of F, Cl, Br, and I. The oxide material includes at least one selected from the group consisting of oxides of divalent metal elements and oxides of trivalent metal elements. The mass proportion of the oxide material to the solid electrolyte is 1% or more and 50% or less. A battery includes a positive electrode, a negative electrode, and a solid electrolyte layer disposed between the positive electrode and the negative electrode, and at least one selected from the group consisting of the positive electrode, the negative electrode, and the electrolyte layer contains the above solid electrolyte material.