Mixed Oxy-Sulfide Solid Electrolytes for Stable High-Conductivity Batteries
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
All-oxide solid electrolytes have low ionic conductivity and are chemically unstable, while high-conductivity all-sulfide electrolytes are expensive and chemically unstable, posing challenges for battery design and manufacturing.
Innovation Solution
Development of mixed oxy-sulfide solid electrolytes with nitrogen-doped mixed network former glasses, which combine high conductivity, chemical stability, and low-cost production, enabling the creation of stable and efficient solid-state batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If all-oxide solid electrolytes are used, then chemical stability is improved, but ionic conductivity deteriorates
Solution Approach 1:
The patent applies composite materials by creating oxy-sulfide solid electrolytes that combine oxide and sulfide components. This composite approach allows the material to achieve both chemical stability from the oxide portion and high ionic conductivity from the sulfide portion, resolving the contradiction between these two properties that plague pure all-oxide or pure all-sulfide systems.
2Reliability
If all-sulfide solid electrolytes are used, then ionic conductivity is improved, but chemical stability deteriorates
Solution Approach 1:
The patent creates a composite oxy-sulfide system where sulfide components provide the high ionic conductivity while oxide components provide chemical stability. This composite structure allows both properties to coexist, overcoming the limitation of pure all-sulfide electrolytes that are highly conducting but chemically unstable and expensive to manufacture.
3Reliability
If high-conductivity all-sulfide electrolytes are used, then manufacturing cost deteriorates, but ionic conductivity is improved
Solution Approach 1:
The patent employs cheaper oxide components in the composite oxy-sulfide electrolyte to replace expensive all-sulfide materials while maintaining acceptable performance. The oxide-sulfide composite approach allows use of more economical materials without sacrificing the high ionic conductivity needed for practical battery applications.
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 mixed oxy-sulfide electrolytes achieve high ionic conductivity, chemical stability, and mechanical strength, facilitating the production of low-cost, high-capacity solid-state batteries with improved energy and power densities.
Implementation Method 1
nitrogen-doped mixed network former glasses
Implementation Method 2
mixed network former glasses
Implementation Method 3
ion conductive mixed oxy-sulfide-nitride solid electrolytes
Data Source
AI summary
An ion conductivity mixed chalcogenide (e.g. oxy-sulfide), mixed network former solid electrolyte is provided for use in solid state batteries.