Polymeric Gel Electrolyte for Solid-State Battery Interfaces
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Solution Overview
Problem
Solid-state batteries experience low power capabilities due to interfacial resistance between solid-state electrodes and electrolyte layers, primarily caused by limited contact and void spaces.
Innovation Solution
Incorporation of a polymeric gel electrolyte system with specific additives and polymer hosts to enhance interfacial contact and conductivity, along with a bipolar current collector system to improve power capabilities and energy density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a solid-state electrolyte layer is used to physically separate electrodes, then safety and shelf life are improved, but interfacial resistance increases and power capability decreases
Solution Approach 1:
The patent applies composite materials by combining solid-state electroactive particles with polymeric gel electrolyte to form composite electrodes. This composite structure maintains the safety benefits of solid-state batteries while the gel electrolyte component fills void spaces and improves interfacial contact, thereby reducing interfacial resistance and enhancing power capability.
Solution Approach 2:
The polymeric gel electrolyte acts as an intermediary between the solid-state electroactive particles and the liquid electrolyte. It improves interfacial contact and reduces resistance by filling gaps and creating better electrical contact, while the solid-state particles provide the safety and shelf life benefits.
2Quantity of substance
If solid-state electroactive material particles are used, then energy density is improved, but interfacial contact is limited and void spaces increase
Solution Approach 1:
The polymeric gel electrolyte serves as an intermediary material that fills the void spaces between solid-state electroactive particles and improves interfacial contact. This allows the battery to maintain high energy density from the solid-state particles while eliminating the contact problems through the gel's ability to conform and fill gaps.
Solution Approach 2:
The patent utilizes the porous structure created by solid-state particles and fills it with polymeric gel electrolyte. The gel occupies the void spaces and porous regions, creating continuous conductive pathways while maintaining the high energy density packing of solid-state particles.
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 polymeric gel electrolyte system enhances interfacial contact, leading to improved power capabilities and energy density in solid-state batteries, addressing the limitations of existing solid-state battery designs.
Implementation Method 1
The electrolyte is suitable for conducting lithium ions between the electrodes
Implementation Method 2
Incorporation of a polymeric gel electrolyte system with specific additives and polymer hosts to enhance interfacial contact
Data Source
AI summary
An electrochemical cell that cycles lithium ions is provided. The electrochemical cell includes a first electrode, a second electrode, and an electrolyte layer disposed between the first electrode and the second electrode. The first electrode includes a first plurality of solid-state electroactive material particles and a first polymeric gel electrolyte, where the first polymeric gel electrolyte includes a first additive. The second electrode includes a second plurality of solid-state electroactive material particles and a second polymeric gel electrolyte that is different from the first polymeric gel electrolyte, where the second polymeric gel electrolyte includes a second additive. The electrolyte layers include a third polymeric gel electrolyte that is different from both the first polymeric gel electrolyte and the second polymeric gel electrolyte.