Self-Healing Resin Layer for All-Solid-State Battery End Collapse
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Solution Overview
Problem
All-solid-state batteries face issues with the collapse of electrode laminates due to cracks formed during elongation, which can lead to loss of battery characteristics, especially when using materials with high expansion and contraction rates, and existing self-healing polymers cannot effectively heal cracks at normal temperatures.
Innovation Solution
Incorporating a resin layer with a polymer that has a self-healing function through host-guest interactions, where the polymer is crosslinked via bonding between host and guest molecules, to cover the ends of the electrode laminate, allowing for attachment of separated polymer blocks at normal temperatures and preventing collapse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional resin layer is used to cover the ends of the electrode laminate, then the structure provides basic protection, but cracks form under stress and the resin cannot heal itself, leading to collapse of the electrode laminate
Solution Approach 1:
The resin layer incorporates a polymer with self-healing function that can autonomously repair cracks without external intervention. When cracks occur in the resin layer under stress, the polymer's self-healing mechanism activates to restore the structural integrity, preventing collapse of the electrode laminate and maintaining reliability throughout the battery's operational life
Solution Approach 2:
The invention creates a composite resin layer combining a polymer matrix with self-healing functional components. This composite structure integrates the mechanical protection of the resin with the autonomous repair capability of the self-healing polymer, achieving both crack resistance and structural integrity simultaneously
2Quantity of substance
If materials with high expansion and contraction rates are used in the electrode laminate, then the battery achieves higher capacity, but the ends of the laminate are more prone to cracking and collapse under stress
Solution Approach 1:
The resin layer with self-healing polymer provides preventive protection against cracks before they can cause damage. The polymer's self-healing function acts as a cushioning mechanism that anticipates and repairs stress-induced cracks in advance, maintaining structural stability even when high-capacity materials with significant expansion and contraction are used in the electrode laminate
3Ease of operation
If existing self-healing polymers are used, then some crack healing capability is provided, but they cannot effectively heal cracks at normal temperatures, requiring additional heating mechanisms
Solution Approach 1:
The self-healing polymer in the resin layer is specifically designed to activate its healing function at normal operating temperatures without requiring external heating. The polymer's chemical or physical properties are engineered to undergo parameter changes that enable crack healing within the normal temperature range, eliminating the need for additional heating mechanisms and simplifying the overall battery structure
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 self-healing resin layer effectively heals cracks in the polymer, preventing the collapse of the electrode laminate and maintaining battery performance even under sudden stress or electrode expansion, thus enhancing the stability and longevity of the battery.
Implementation Method 1
the polymer having a self-healing function and a structure crosslinked via bonding between a host molecule and a guest molecule
Data Source
AI summary
Provided is an all-solid-state battery configured to suppress the collapse of an end in the plane direction of an electrode laminate. Disclosed is an all-solid-state battery comprising an electrode laminate that comprises a cathode comprising a cathode layer, an anode comprising an anode layer, and a solid electrolyte layer disposed between the cathode layer and the anode layer, wherein a resin layer containing a polymer is disposed in at least a part of an end in a plane direction of the electrode laminate, the polymer having a self-healing function and a structure crosslinked via bonding between a host molecule and a guest molecule.