Dual-Coated Solid-State Cathode for Lithium-Ion and Electron Transport
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Solution Overview
Problem
Existing solid-state battery technologies face challenges in enhancing lithium-ion conduction and electronic conductivity in cathode materials, which affect the performance and cycling stability of battery cells.
Innovation Solution
A solid-state battery system with a coated cathode active material comprising lithium niobate and titanium diboride overlying the cathode active material, along with a solid electrolyte layer between the cathode and anode, to facilitate lithium-ion conduction paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cathode materials are used in solid-state batteries, then the battery structure is simpler, but lithium-ion conduction and electronic conductivity are insufficient
Solution Approach 1:
The cathode active material is coated with a composite coating layer comprising lithium niobate and titanium diboride. This composite coating provides both lithium-ion conduction pathways and electronic conductivity, resolving the contradiction between maintaining simple structure and achieving sufficient dual conduction properties.
Solution Approach 2:
The coating is applied specifically to the surface of the cathode active material particles, creating localized regions with enhanced lithium-ion conduction and electronic conductivity properties where needed, while the bulk material maintains its original characteristics.
2Productivity
If cathode materials with enhanced conductivity are used, then battery performance improves, but manufacturing complexity increases
Solution Approach 1:
The coating process utilizes controlled sintering temperature and atmosphere parameters to achieve the desired coating thickness and composition. By optimizing these parameters, the patent achieves enhanced battery performance while maintaining manufacturing feasibility through standard ceramic processing techniques.
3Reliability
If dual coating layers are applied to cathode material, then electronic conductivity and lithium-ion conduction are enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The coating process is designed to form the lithium niobate and titanium diboride layers through a controlled sintering process that occurs before battery assembly. This preliminary formation ensures uniform coating distribution and proper interfacial contact between layers, reducing precision requirements during subsequent assembly steps.
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 system enhances lithium-ion conduction and electronic conductivity, improving the capacity and cycling stability of battery cells, particularly in vehicles utilizing electrical energy for motive force.
Implementation Method 1
The solid electrolyte is operable to provide lithium-ion conduction paths between the cathode and the anode
Implementation Method 2
A solid-state battery cell includes a solid electrolyte layer or film which provides lithium-ion conduction paths between the anode and the cathode
Data Source
AI summary
A solid-state battery system includes a cathode that includes a coated cathode active material. The coated cathode active material includes a cathode active material, lithium niobate overlying the cathode active material, and titanium diboride overlying the cathode active material. The solid-state battery system further includes an anode and a solid electrolyte that is disposed between the cathode and the anode. The solid electrolyte is operable to provide lithium-ion conduction paths between the cathode and the anode.