Prelithiated Hybrid Energy Storage Electrodes With Dry Processing
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Solution Overview
Problem
Conventional energy storage devices, such as batteries and capacitors, face limitations in cycle efficiency and are affected by temperature conditions, leading to decreased performance over time, while hybrid devices combining both battery and capacitor characteristics aim to enhance energy and power delivery but require complex manufacturing processes and costly materials.
Innovation Solution
The development of hybrid energy storage devices with electrodes comprising a blend of battery and capacitor materials, including lithium-intercalating carbon particles and elemental lithium metal, which are pre-lithiated to improve energy density and power delivery, using a dry process to eliminate solvent residues and reduce manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional battery and capacitor materials are used separately, then device simplicity is maintained, but energy density and power delivery are insufficient
Solution Approach 1:
The patent combines battery materials (lithium-intercalating carbon particles) and capacitor materials (activated carbon particles) into a single hybridized electrode composition, merging the high energy density benefits of batteries with the high power delivery benefits of capacitors into one integrated system
2Power
If hybrid devices combining battery and capacitor characteristics are created, then energy and power delivery are enhanced, but manufacturing complexity and material cost increase
Solution Approach 1:
The patent merges battery and capacitor materials into a single hybridized electrode composition that can be manufactured using conventional battery manufacturing processes, avoiding the need for complex multi-step manufacturing procedures while achieving enhanced power delivery
Solution Approach 2:
The patent modifies the compositional parameters of the electrode by incorporating specific ratios of lithium-intercalating carbon particles and activated carbon particles, along with prelithiation agents, to optimize both power delivery and manufacturing compatibility
3Use of energy by moving object
If electrodes are pre-doped during fabrication, then energy density is improved, but manufacturing process complexity increases
Solution Approach 1:
The patent incorporates prelithiation agents directly into the electrode composition during the initial mixing stage, performing the prelithiation action beforehand rather than requiring separate post-fabrication doping steps, thereby simplifying the overall manufacturing process
Solution Approach 2:
The patent combines the prelithiation function with the electrode material composition itself by incorporating lithium-rich compounds into the hybridized mixture, merging multiple functions (energy storage and prelithiation) into a single integrated material system
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 hybrid energy storage devices achieve high efficiency, with a first cycle efficiency of at least 80%, improved energy density, and reduced irreversible capacity loss, while simplifying the manufacturing process and reducing costs by using elemental lithium metal and dry processing techniques.
Implementation Method 1
a first electrode comprising an electrochemically active material and first porous carbon particles; a second electrode comprising lithium-intercalating carbon particles and elemental lithium metal
Implementation Method 2
a second electrode comprising lithium-intercalating carbon particles and elemental lithium metal
Data Source
AI summary
An energy storage device can include a first electrode, a second electrode and a separator between the first electrode and the second electrode wherein the first electrode includes an electrochemically active material and a porous carbon material, and the second electrode includes elemental lithium metal and carbon particles. A method for fabricating an energy storage device can include forming a first electrode and a second electrode, and inserting a separator between the first electrode and the second electrode, where forming the first electrode includes combining an electrochemically active material and a porous carbon material, and forming the second electrode includes combining elemental lithium metal and a plurality of carbon particles.