Battery Member Polymer Coating for Electrochemical Resistance
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Solution Overview
Problem
Constituent members of batteries, such as solid electrolytes, exhibit poor resistance to electrochemical reactions like oxidation and reduction, limiting the freedom in member combinations.
Innovation Solution
A coating material for battery members containing a polymer that preferentially conducts metal ions, which can be applied to ion conductive inorganic solid electrolytes, enhancing their electrochemical resistance by including a swelling agent and anionic functional groups capable of scavenging anions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ion conductive inorganic solid electrolytes are used in batteries, then high capacity and safety are achieved, but electrochemical resistance is poor leading to limited member combination freedom
Solution Approach 1:
A polymer coating layer is introduced as an intermediary between the ion conductive inorganic solid electrolyte and other battery members. This coating layer mediates the interaction by providing electrochemical stability while allowing ion transport, thus protecting the reactive solid electrolyte surface without blocking ion conduction.
Solution Approach 2:
The battery member structure is transformed into a composite material system where a polymer coating is applied on the inorganic solid electrolyte surface. This composite structure combines the high ion conductivity of the inorganic material with the electrochemical stability and flexibility of the polymer, resolving the contradiction between reliability and adaptability.
2Reliability
If conventional solid electrolytes are used, then safety is improved, but resistance to oxidation and reduction reactions is poor
Solution Approach 1:
The polymer coating acts as a protective intermediary layer that shields the inorganic solid electrolyte from direct contact with oxidizing and reducing agents in the battery environment. This mediator function prevents harmful electrochemical reactions while maintaining the safety benefits of the solid electrolyte.
Solution Approach 2:
The polymer coating creates an inert chemical environment around the inorganic solid electrolyte surface, preventing unwanted oxidation and reduction reactions. This inert barrier allows the solid electrolyte to maintain its safety advantages without suffering from poor electrochemical stability.
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 coating material improves the electrochemical resistance of battery members, stabilizing them in a potential range of -0.1 to 4.5 V, thereby enhancing the performance and longevity of batteries.
Implementation Method 1
containing a polymer having an ability to preferentially conduct metal ions
Implementation Method 2
anionic functional groups capable of scavenging anions
Data Source
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AI summary
A coating material for a battery member contains a polymer having an ability to preferentially conduct metal ions.