Metal Oxide Composite Side Coating for Sintering Integrity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge in manufacturing secondary batteries is the occurrence of cracking and peeling during the sintering process of stacked metal oxide layers with different compositions, which affects the structural integrity and purity of the battery electrodes.
Innovation Solution
A metal oxide composite is created by alternately stacking first and second metal oxide layers and disposing a third metal oxide layer on the side surfaces, ensuring the third metal oxide layer is the same as the layers in the stack, thereby minimizing differences in sintering behavior and preventing cracking and peeling during the sintering process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different metal oxide layers are stacked together to create composite structure, then the functional performance is improved, but cracking and peeling occur during sintering
Solution Approach 1:
A buffer layer comprising a metal oxide matching the sintering characteristics of at least one of the first or second metal oxides is introduced between the different metal oxide layers. This buffer layer acts as an intermediary that mediates the sintering process, preventing direct contact between layers with mismatched sintering behaviors, thereby eliminating cracking and peeling while preserving the functional benefits of the composite structure.
Solution Approach 2:
The buffer layer is selectively positioned only at specific interfaces where sintering characteristic mismatches occur between different metal oxide layers. This localized application ensures that the buffer layer addresses the specific problem areas without unnecessarily complicating the overall structure, maintaining structural integrity precisely where needed.
2Reliability
If additives are used to prevent cracking during sintering, then structural integrity is improved, but physical properties are degraded
Solution Approach 1:
The buffer layer is designed as a sacrificial or temporary structural element that performs its protective function during the sintering process and can be removed or integrated afterward. This disposable approach allows the buffer layer to provide necessary structural support during manufacturing without permanently compromising the physical properties of the final product.
Solution Approach 2:
The buffer layer serves as a temporary intermediary structure that facilitates the sintering process by preventing cracking, then can be selectively removed or integrated. This mediator approach avoids the need for permanent additives that would degrade physical properties, as the buffer layer's protective function is achieved through its temporary presence during the critical sintering phase.
3Quantity of substance
If multiple different metal oxide layers are stacked, then compositional diversity is improved, but sintering behavior becomes inconsistent
Solution Approach 1:
The buffer layer is strategically placed only at specific interfaces where sintering characteristic mismatches occur between different metal oxide layers. This localized approach allows compositional diversity to be maintained in the functional layers while providing targeted stabilization only where needed, preserving sintering behavior consistency without compromising compositional variety.
Solution Approach 2:
The buffer layer acts as a local intermediary at interfaces between metal oxide layers with different sintering characteristics. It provides a transition zone that harmonizes the sintering behavior across the composite structure, allowing diverse metal oxide compositions to be stacked together without experiencing inconsistent sintering, as each interface is mediated by an appropriate buffer layer.
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
This approach results in a more compact and pure metal oxide composite with improved structural integrity, eliminating the need for additional additives that could degrade physical properties, and simplifies the manufacturing process by preventing cracking and peeling.
Implementation Method 1
the occurrence of cracking and peeling during the sintering process of stacked metal oxide layers
Implementation Method 2
different compositions cause differential thermal expansion and contraction leading to cracking and peeling
Data Source
AI summary
A metal oxide composite including a first metal oxide composite layer, and a second metal oxide layer, wherein the first metal oxide composite layer and the second metal oxide layer are alternately stacked in a thickness direction; and a third metal oxide layer that is disposed on a side surface of the stacked structure, wherein the third metal oxide layer includes a metal oxide that is a same metal oxide as a metal oxide included in the stacked structure.