High-Conductivity Oxides for Safer Solid-State Batteries
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Summary
Problems
Current solid-state lithium-ion conductors, particularly oxide materials, face challenges such as low ionic conductivity and limited electrochemical stability, hindering the widespread adoption of solid-state batteries, while sulfide-based materials pose safety risks and have limited electrochemical stability.
Innovation solutions
Development of novel lithium-containing oxides within the Li—Ca—Zr—O chemical space using a machine learning-based crystal structure prediction algorithm, specifically compositions like Li2—zCaZr3O8, Li6—zCaZrO6, Li2—zCaZrO4, and Li2—zCaZr2O6, which exhibit high ionic conductivity and improved electrochemical stability.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If sulfide-based solid-state electrolytes are used, then high ionic conductivity is achieved, but safety risks and limited electrochemical stability occur
Why choose this principle:
The patent develops composite oxide materials combining multiple metal elements (Li, Ca, Zr, Al, Ta, Nb, W, Mo, Hf) to create solid-state electrolytes that achieve high ionic conductivity while maintaining electrochemical stability. The composite structure allows synergistic effects where different metal oxides contribute their advantageous properties, resolving the contradiction between conductivity and stability.
Principle concept:
If sulfide-based solid-state electrolytes are used, then high ionic conductivity is achieved, but safety risks and limited electrochemical stability occur
Why choose this principle:
The patent systematically varies compositional parameters (ratios of different metal oxides, stoichiometry) and structural parameters (crystal structure, density) to optimize the balance between ionic conductivity and electrochemical stability. By changing these parameters, the material properties are tuned to achieve both high conductivity and stability simultaneously.
Application Domain
Data Source
AI summary:
Development of novel lithium-containing oxides within the Li—Ca—Zr—O chemical space using a machine learning-based crystal structure prediction algorithm, specifically compositions like Li2—zCaZr3O8, Li6—zCaZrO6, Li2—zCaZrO4, and Li2—zCaZr2O6, which exhibit high ionic conductivity and improved electrochemical stability.
Abstract
A lithium-containing oxide has one of the following parent compositions: Li2—zCaZr3O8, Li6—zCaZrO6, Li2—zCaZrO4, Li2—zCaZr2O6, or Li6—zCaZr2O8, where z ranges from −1 to 1. A lithium solid-state battery includes an anode, a cathode, and a solid electrolyte, wherein the solid electrolyte includes the aforementioned lithium-containing oxide. Also, a solid-state battery includes an anode, a cathode, and a solid electrolyte, wherein at least one of the anode and the cathode is coated with a coating which includes the aforementioned lithium-containing oxide.