Droplet Jet Reaction Chamber for Uniform Cathode Particles
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Solution Overview
Problem
Conventional manufacturing processes for lithium ion battery cathode active materials are costly, time-consuming, and result in inconsistent quality due to challenges in producing uniform particles with desired crystal structures and morphologies, leading to low energy density and cycle life.
Innovation Solution
A processing system that jets a liquid mixture into droplets and disperses them with gases in a reaction chamber to form particulate materials, allowing for continuous production of high-quality active electrode materials with controlled particle size and morphology, reducing manufacturing time and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional solid-state processes (grinding and pyrolysis at extreme high temperature) are used to prepare graphite materials, then the crystal structure is formed, but the manufacturing time and energy consumption are extremely high
Solution Approach 1:
The patent changes the physical state parameter from solid-state to liquid-state processing. By dissolving precursors in a liquid medium and using controlled precipitation, the process achieves crystal formation at much lower temperatures and shorter times compared to conventional solid-state pyrolysis at 3000°C
Solution Approach 2:
The patent performs preliminary mixing of precursors in a liquid solution before precipitation, ensuring homogeneous distribution of elements. This preliminary homogenization in liquid phase eliminates the need for extensive high-temperature solid-state reaction and grinding steps
2Ease of manufacture
If conventional manufacturing processes are used for cathode active materials, then production can be performed with existing equipment, but the quality consistency is poor due to difficulty in producing uniform particles with desired crystal structures and morphologies
Solution Approach 1:
The patent enables local control of particle properties through controlled precipitation conditions. By adjusting local parameters such as precipitation rate, temperature, and stirring speed in the liquid medium, uniform particles with consistent crystal structures and morphologies are achieved
Solution Approach 2:
The patent introduces a liquid medium as an intermediary between precursors and final product. This liquid medium facilitates homogeneous mixing and controlled precipitation, acting as a mediator that enables precise control over particle formation and improves quality consistency
3Device complexity
If conventional batch processing methods are used, then equipment complexity is low, but productivity is low due to long manufacturing time and high labor requirements
Solution Approach 1:
The patent enables continuous processing by replacing batch operations with continuous liquid-phase synthesis. The liquid medium allows for continuous feeding of precursors, continuous stirring, and continuous product formation, significantly increasing productivity while maintaining relatively simple equipment
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 system enables the production of high-quality, consistent active materials with improved energy density and cycle life, reducing production time, labor, and costs compared to conventional methods.
Implementation Method 1
an array of one or more power jet modules adapted to jet the liquid mixture into one or more streams of droplets and to force the one or more streams of droplets into the processing system
Implementation Method 2
a dispersion chamber adapted to disperse the one or more gas flows with the one or more streams of droplets jetted from the one or more power jet modules such that gas flows of the one or more gases and droplets streams of the one or more streams of droplets are dispersed into each other
Implementation Method 3
a reaction chamber adapted to receive the gas-liquid mixture and to process the gas-liquid mixture at a temperature sufficient to form the particulate material
Data Source
AI summary
A processing system and method of producing a particulate material from a liquid mixture are provided. The processing system generally includes a system inlet connected to one or more gas lines to deliver one or more gases into the processing system, one or more power jet modules adapted to jet a liquid mixture into one or more streams of droplets and to force the one or more streams of droplets into the processing system, and a reaction chamber adapted to deliver the one or more streams of droplets in the presence of the one or more gases and process the one or more streams of droplets into the particulate material. The method includes delivering one or more gases into a processing system, jetting the liquid mixture into one or more first droplets streams using one or more power jet modules of the processing system and into the processing system, and reacting the one or more first droplets streams delivered from the processing chamber inside a reaction chamber of the processing system in the presence of the one or more gases into the particulate material at a first temperature.