Anode-Free Primary Battery Electrode Assembly Design
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Solution Overview
Problem
Primary batteries face challenges in achieving high energy density while maintaining stability, as they are typically designed without a negative electrode material, limiting their performance in applications requiring low leakage and stable output.
Innovation Solution
The design of an anode-free primary battery electrode assembly that includes a separator, a positive electrode with a current collector and material, and an electrolyte, without a negative electrode material, allowing for increased positive electrode material and electrolyte volume within the same space, utilizing lithium metal oxides and specific organic solvents for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a conventional primary battery design is used with limited space for positive electrode material, then the battery structure is simple and easy to manufacture, but the energy density is low
Solution Approach 1:
The invention extracts and removes the negative electrode material from the primary battery, creating an anode-free design. This extraction eliminates the space occupation of negative electrode materials and enables the battery to achieve higher energy density by accommodating more positive electrode material and electrolyte in the same volume, while maintaining a relatively simple overall structure
Solution Approach 2:
The invention changes the dimensional distribution of battery components by eliminating the negative electrode layer entirely. This dimensional change allows the positive electrode material to occupy the space previously taken by the negative electrode, thereby increasing the volume fraction of active materials and improving energy density without significantly complicating the battery structure
2Quantity of substance
If highly active metals are used in the battery, then the energy density can be increased, but the safety during manufacturing and storage deteriorates
Solution Approach 1:
The invention converts the potential harm of highly active metals by removing them from the battery structure entirely. By designing an anode-free battery that uses only stable positive electrode materials and electrolytes without reactive metal anodes, the invention eliminates safety hazards during manufacturing and storage while maintaining high energy density through optimized positive electrode and electrolyte composition
3Duration of action of stationary object
If the battery is designed for single use, then the structure can be simplified, but the storage time and usability are limited
Solution Approach 1:
The invention enables preliminary charging of the battery before use by designing an anode-free structure with stable positive electrode materials and electrolyte composition. This preliminary action allows the battery to be charged in advance and stored for extended periods without degradation, while maintaining a simple structure that does not require complex protective mechanisms typically associated with rechargeable batteries
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 configuration results in a primary battery with improved energy density and stability, safer manufacturing and storage due to the absence of highly active metals, and prolonged storage time by enabling activation before use, maintaining performance across multiple cycles.
Implementation Method 1
The electrolyte is provided between the negative electrode current collector and the positive electrode current collector
Implementation Method 2
The positive electrode includes a positive electrode current collector and a positive electrode material
Data Source
AI summary
The disclosure provides a primary battery and an electrode assembly thereof. The electrode assembly includes a separator, a positive electrode, and a negative electrode current collector. The separator has a positive electrode side and a negative electrode side opposite to each other. The positive electrode is located at the positive electrode side of the separator, and the positive electrode includes a positive electrode current collector and a positive electrode material. The negative electrode current collector is located at the negative electrode side of the separator. The electrode assembly does not include a negative electrode material before charging or activation.