Planar Electrochemical Accumulator with Interlocking Printed Architecture
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Solution Overview
Problem
Conventional lithium-ion batteries face challenges in miniaturization and integration into electronic devices due to limitations in flexible packaging tightness and the instability of current collectors at high potentials, which affect energy density and compactness.
Innovation Solution
A metal-ion electrochemical accumulator architecture with an interdigital pattern is developed, using a metallic element as both a current collector and support, allowing for the deposition of active materials and an electrolyte layer, enabling the use of stable metals like aluminum for high-energy density applications without compromising compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional flexible packaging is used to enable miniaturization and flexibility, then the battery can be integrated into electronic devices, but the packaging tightness deteriorates over time due to lack of chemical resistance
Solution Approach 1:
The patent introduces an intermediary sealing structure comprising a sealing layer and a reinforcement layer. The sealing layer (made of polymer materials like polyethylene or polypropylene) provides chemical resistance and tightness, while the reinforcement layer (made of materials like aluminum foil or fabric) provides mechanical strength. This composite sealing structure acts as a mediator between the flexible packaging requirement and the tightness requirement, enabling both device integration and reliable sealing.
2Use of energy by moving object
If current collectors are used at high potentials to achieve high energy density, then the battery capacity increases, but the current collectors become unstable
Solution Approach 1:
The patent changes the material parameter of the current collector from conventional copper or aluminum to stainless steel or other corrosion-resistant metals that can withstand high potentials. This parameter change enables the current collector to maintain stability at high potentials (above 3.7V) while still supporting high energy density applications. The stainless steel current collector forms a stable passive oxide layer that prevents further corrosion and maintains structural integrity.
3Volume of moving object
If printed current collectors are used to achieve planar architecture and miniaturization, then the battery becomes flexible and integrable, but the manufacturing precision and structural stability are compromised
Solution Approach 1:
The patent employs composite current collector structures combining printed conductive layers with supporting substrates. The printed current collector consists of a conductive ink layer (containing metal particles like silver, copper, or stainless steel) deposited on a flexible substrate (such as polymer film or fabric). This composite structure enables miniaturization and flexibility while the substrate provides the necessary mechanical strength and dimensional stability. The conductive layer can be printed with precise patterns to achieve the desired electrode geometry.
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 significantly increases energy density while maintaining compactness, allowing for direct integration into electronic devices and overcoming the limitations of traditional battery architectures.
Implementation Method 1
metal-ion electrochemical generators, which operate according to the principle of insertion or deinsertion, or in other words intercalation-deintercalation, of metal ions in at least one electrode
Implementation Method 2
The electrolyte is generally a mixture of organic solvents, for example carbonates to which is added a lithium salt, typically LiPF6
Data Source
Figure 1~3
Figure 4~5
Figure 6A~6C
AI summary
The invention relates to a metal-ion electrochemical accumulator, comprising: - a flat-surface metallic element (4) forming a current collector of an electrode of one polarity; - an insulating layer (8), deposited on the metallic element by defining an interlocking pattern; - a layer (5) forming a current collector of an electrode of opposite polarity to that of which the current collector is formed by the metallic element, the collector layer being deposited on the interlocking pattern of the insulating layer; - an electrode layer (2), deposited on the metallic element in a pattern at least partially interlocked in the interlocking pattern; - an electrode layer (3) of opposite polarity to that deposited on the metallic element, the opposite polarity layer being deposited on the collector layer in the interlocking pattern; - an electrolyte layer (1) deposited at least in the spaces between the two layers of active materials of opposite polarity.