Oxide Semiconductor Battery Mixed Layer Formation
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Solution Overview
Problem
All solid state secondary batteries have high safety due to non-flammability but limited charge capacity, and existing electrical processing methods like aging and conditioning do not effectively enhance discharge capacity.
Innovation Solution
A manufacturing method for oxide semiconductor secondary batteries involving the stacking of specific layers and applying a cycle voltage of positive and 0V to form a mixed layer between the intermediate insulating layer and the p-type metal oxide semiconductor layer, increasing discharge capacity through the formation of a new interface layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all solid state secondary battery structure is used, then safety is improved due to non-flammability, but charge capacity is limited
Solution Approach 1:
The patent applies preliminary electrical processing (applying positive and negative voltages) before the battery is put into service to form a mixed layer at the interface between the insulating layer and p-type metal oxide semiconductor layer. This preliminary action increases the discharge capacity from 1.0 to 1.8 times the initial capacity by creating additional charge storage sites, thereby resolving the contradiction between maintaining solid-state safety and increasing charge capacity.
Solution Approach 2:
The patent changes the electrical parameters (voltage and time) of the preliminary processing step to optimize the formation of the mixed layer. By controlling the voltage application conditions, the discharge capacity is enhanced while maintaining the solid-state structure's safety characteristics, thus resolving the capacity limitation without compromising safety.
2Stability of the object's composition
If existing electrical processing methods (aging and conditioning) are used, then battery stabilization is achieved, but discharge capacity enhancement is limited
Solution Approach 1:
The patent introduces a preliminary electrical processing step that is performed before conventional aging and conditioning. This preliminary action involves applying positive and negative voltages to form a mixed layer that creates additional charge storage interfaces, thereby enhancing discharge capacity while still achieving battery stabilization through the subsequent conventional processing steps.
Solution Approach 2:
The patent creates a composite structure at the interface between the insulating layer and p-type metal oxide semiconductor layer through preliminary electrical processing. This mixed layer acts as a composite material with enhanced charge storage capability, allowing the battery to achieve both stabilization and increased discharge capacity beyond what conventional processing alone can provide.
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 method doubles the discharge capacity by forming a mixed layer that enhances the accumulation of positive and negative charges, stabilizing the battery performance and increasing storage capacity.
Implementation Method 1
an active layer comprising a composite of a semiconductor metal oxide and an insulating metal oxide and reversibly generating an oxidation-reduction
Data Source
Figure 1
Figure 2(A)~2(B)
Figure 3
AI summary
To provide a manufacturing method of a secondary battery capable of increasing discharge capacity. The method of manufacturing a secondary battery according to the present invention comprises a first electrode 12, an n-type metal oxide semiconductor layer 14 made of an n-type metal oxide semiconductor, an n-type metal oxide semiconductor and an insulator An intermediate insulating layer 18 containing an insulator as a main component, a p-type metal oxide semiconductor layer 22 made of a p-type metal oxide semiconductor, and a second electrode 24 are laminated in this order , A first process of applying a positive voltage between the first electrode 12 and the second electrode 24 with reference to the first electrode 12 and a second process of applying a positive voltage between the first electrode 12 and the second electrode 24 And a second process in which 0 V is applied between the first process cycle and the second process cycle in this order is defined as a first unit cycle and a predetermined number of first unit cycles are repeated.