3D Lithium Adsorbent via Porous Ceramic Foam
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Solution Overview
Problem
Existing lithium adsorbents face challenges in achieving high lithium adsorption rates per unit volume and unit mass, while also maintaining strong durability and versatility in shape.
Innovation Solution
A method for preparing a three-dimensional lithium adsorbent involves coating a lithium positive electrode active material with silane compounds, mixing it with an inorganic binder and polymer beads, molding into a three-dimensional structure, and firing to produce a durable adsorbent with high adsorption capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If powder lithium adsorbent is used, then lithium adsorption performance is improved, but handling and processing difficulty increases
Solution Approach 1:
The patent uses porous ceramic foam as a carrier material that provides high surface area and porosity for lithium adsorption while maintaining a fixed three-dimensional structure. The porous structure allows lithium ions to diffuse into the interior surfaces, achieving high adsorption performance while the rigid foam structure eliminates handling difficulties associated with powder materials.
Solution Approach 2:
The patent creates a composite structure by coating lithium-containing ceramic particles onto the porous ceramic foam carrier. This composite approach combines the high lithium adsorption capacity of fine ceramic particles with the structural integrity and ease of handling of the foam carrier, resolving the contradiction between adsorption performance and operational ease.
2Ease of operation
If carrier is excessively included in lithium adsorbent, then handling ease is improved, but lithium adsorption rate decreases
Solution Approach 1:
The patent applies local quality by concentrating the lithium-containing ceramic material specifically on the surface and within the porous structure of the foam carrier, rather than uniformly distributing carrier material throughout. This ensures that the carrier provides structural support and ease of handling while the lithium-rich zones maintain high adsorption rates.
Solution Approach 2:
The porous ceramic foam carrier provides a three-dimensional network with high surface area-to-volume ratio, allowing lithium-containing particles to be distributed throughout the porous structure rather than just on the external surface. This maximizes the active adsorption sites while using minimal carrier material, maintaining high adsorption rates while providing adequate structural support.
3Ease of operation
If lithium adsorbent is made in fixed form, then handling ease is improved, but shape versatility decreases
Solution Approach 1:
The patent utilizes the three-dimensional porous structure of the ceramic foam carrier, which can be manufactured in various shapes and configurations. The foam structure provides fixed form for handling ease while the dimensional flexibility of foam manufacturing allows adaptation to different application requirements, resolving the contradiction between fixed form and shape versatility.
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 resulting three-dimensional lithium adsorbent exhibits a high lithium adsorption rate, strong durability, and the ability to be formed into various shapes, addressing the limitations of traditional lithium adsorbents.
Implementation Method 1
coating a surface of a lithium positive electrode active material with one or more silane compounds
Implementation Method 2
a method for recovering lithium using an adsorbent which selectively adsorb a lithium ion
Implementation Method 3
the polymer bead may be removed by thermal decomposition by the firing of (S4)
Data Source
AI summary
Provided are a method for preparing a three-dimensional lithium adsorbent, which produces a lithium adsorbent having a high lithium adsorption rate per unit volume and unit mass, strong durability, and various shapes, and a three-dimensional lithium adsorbent using the same.