Flash Battery Recycling That Preserves Cathode 3D Morphology
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Solution Overview
Problem
Current recycling methods for spent lithium-ion batteries are inefficient, requiring high-temperature furnaces or harsh wet extraction methods, which destroy the 3D morphology of cathodes, making them economically and environmentally unattractive, and result in less than 5% recycling rates, leading to the continued mining of valuable metals and environmental concerns.
Innovation Solution
A solvent-free and water-free flash Joule heating method combined with magnetic separation is used to recycle lithium-ion batteries, preserving the 3D layered structure of cathodes and producing a lithium-ion permeable conductive carbon coating, allowing for high-yield recovery of metals like lithium, cobalt, and nickel, and purification of graphite anodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If high-temperature furnaces or harsh wet extraction methods are used to recycle metals from spent batteries, then metal recovery yield is improved, but the 3D morphology of cathodes is destroyed and energy consumption increases
Solution Approach 1:
The invention changes the temperature parameter from conventional high-temperature processing to flash Joule heating at controlled temperatures, and changes the chemical environment from harsh wet extraction to solvent-free conditions. This resolves the contradiction by achieving high metal recovery through controlled parameter changes that preserve cathode morphology.
Solution Approach 2:
The invention replaces the mechanical/chemical destruction processes (high-temperature furnaces and harsh wet extraction) with flash Joule heating combined with magnetic separation. This substitution achieves metal recovery without destroying the cathode's 3D morphology.
2Loss of substance
If high-temperature furnaces or harsh wet extraction methods are used to recycle metals, then metal recovery yield is improved, but energy consumption increases making the process economically unattractive
Solution Approach 1:
The invention changes the energy input method from continuous high-temperature furnaces to pulsed flash Joule heating, and changes the chemical processing from energy-intensive wet extraction to solvent-free processing. This resolves the contradiction by achieving high metal recovery with significantly reduced energy consumption through parameter optimization.
Solution Approach 2:
The invention replaces energy-intensive high-temperature furnaces and harsh wet extraction methods with flash Joule heating combined with magnetic separation. This substitution achieves comparable or superior metal recovery yields with dramatically lower energy consumption, making the process economically viable.
3Loss of substance
If current recycling methods are used, then metal recovery is achieved, but environmental harm increases due to harsh chemicals and high energy consumption
Solution Approach 1:
The invention replaces harsh wet extraction methods using corrosive chemicals with flash Joule heating and magnetic separation. This substitution eliminates the need for harmful chemicals while achieving high metal recovery, and replaces high-temperature furnaces with controlled flash heating, dramatically reducing environmental harm.
Solution Approach 2:
The invention converts the harmful effects of conventional methods (high energy consumption, harsh chemicals) into benefits by using flash Joule heating that operates under controlled conditions without harmful byproducts, and by eliminating solvent use entirely, thus achieving metal recovery with minimal environmental impact.
4Use of energy by moving object
If flash Joule heating is used to recycle batteries, then energy consumption is reduced and cathode structure is preserved, but processing speed must be optimized
Solution Approach 1:
The invention uses periodic pulsed voltage application in flash Joule heating rather than continuous heating. This periodic action allows controlled energy input that reduces overall energy consumption while the rapid heating-cooling cycles maintain processing efficiency, resolving the contradiction between energy savings and processing speed.
Solution Approach 2:
The invention uses flash Joule heating that rapidly heats the material through brief high-power pulses, then quickly cools it. This 'rushing through' the heating process achieves the desired chemical changes and metal separation in reduced time, maintaining productivity while consuming less total energy compared to prolonged low-power heating.
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 method achieves high recovery yields of up to 98% for metals and maintains the structural integrity of cathode materials, reducing energy consumption and greenhouse gas emissions while making recycling economically viable, thus minimizing the need for mining and environmental impact.
Implementation Method 1
applying a voltage across the mixture to obtain metals and cathode waste from the cathode material. The voltage is applied in one or more voltage pulses
Implementation Method 2
magnetically separating the metal and the cathode waste
Data Source
AI summary
Method and system for flash recycling of batteries, including lithium-ion batteries, other metal (sodium, potassium, zinc, magnesium, and aluminum)-ion batteries, metal batteries, batteries having all metal oxide cathodes, and batteries having graphite-containing anodes. The method and system include a solvent-free and water-free flash Joule heating (FJH) method performed upon a mixture that includes materials from the batteries done in millisecond for recycling the materials. In some embodiments, the FJH method is combined with magnetic separation to recover lithium, cobalt, nickel, and manganese with high yields up to 98%. In some embodiments, the FJH method is followed by rinsing with dilute acid, such a 0.01 M HCl. In other embodiments, the FJH method is utilized to purify the graphite in the battery, such as for use in the anode of the battery.