Lithium Battery Recycling via Water Reaction for Clean Hydrogen
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Solution Overview
Problem
The recycling of lithium from lithium metal anode-based batteries, particularly all-solid-state batteries, is a challenge due to limited resources and growing demand, while current hydrogen production methods, such as water electrolysis, have low energy efficiency and high energy costs.
Innovation Solution
A chemical process that recycles lithium metal from batteries by reacting it with water to produce hydrogen and lithium hydroxide, utilizing a spontaneous reaction that generates hydrogen and heat with minimal waste, allowing for the regeneration of lithium and efficient hydrogen production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If water electrolysis is used to produce hydrogen, then hydrogen can be produced cleanly, but energy efficiency is low and energy costs are high
Solution Approach 1:
The invention changes the fundamental reaction parameters from electrochemical water splitting to chemical reaction between lithium metal and water. This parameter change transforms the process from high-energy-consumption electrolysis to a spontaneous exothermic reaction that produces hydrogen without external energy input, while maintaining clean production by avoiding fossil fuel-based methods
Solution Approach 2:
The lithium metal itself serves dual purposes: it acts as both the reactant to produce hydrogen and as the valuable material to be recovered. The reaction is self-sustaining through the spontaneous chemical reaction between lithium and water, eliminating the need for external energy input required in traditional electrolysis methods
2Use of energy by moving object
If lithium metal is reacted with water to produce hydrogen, then energy efficiency improves and costs decrease, but the process must handle reactive lithium metal safely
Solution Approach 1:
The invention converts the harmful reactivity of lithium metal (which poses safety risks) into a beneficial feature. The spontaneous and highly exothermic nature of the lithium-water reaction, which could be dangerous, is harnessed to drive the hydrogen production process without external energy input and to facilitate the recovery of lithium in the form of lithium hydroxide or lithium carbonate
Solution Approach 2:
The invention introduces water as an intermediary substance that safely mediates the reaction between lithium metal and the environment. Water controls the reaction rate and serves as both the hydrogen source and the medium that converts reactive lithium metal into stable lithium hydroxide or lithium carbonate products
3Productivity
If lithium resources are extracted for new batteries, then battery performance improves, but resource depletion accelerates
Solution Approach 1:
Instead of discarding lithium-containing batteries as waste, the invention recovers the lithium metal through the chemical reaction with water. The lithium is transformed into lithium hydroxide or lithium carbonate, which can be further processed to regenerate lithium metal for reuse in new batteries, thereby closing the material loop and enabling sustainable battery production
Solution Approach 2:
The invention creates a multi-functional process that simultaneously achieves three objectives: produces clean hydrogen energy, recovers valuable lithium metal, and manages battery waste. This universal approach addresses multiple challenges in the battery lifecycle through a single integrated process
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 process enables the recycling of lithium from lithium metal batteries while producing clean hydrogen, reducing greenhouse gas emissions and energy costs, and provides a sustainable solution for both lithium recycling and hydrogen production.
Implementation Method 1
reacting it with water to produce hydrogen and lithium hydroxide, utilizing a spontaneous reaction that generates hydrogen and heat
Implementation Method 2
utilizing a spontaneous reaction that generates hydrogen and heat
Data Source
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AI summary
The present application concerns a process for simultaneously recycling lithium-metal electrodes of batteries and clean producing dihydrogen by water hydrolysis.