Composite Lithium-Ion Anode With Joule-Heated Carbon-Metal Catalyst
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Solution Overview
Problem
Lithium ion batteries face issues with reduced reversibility and life due to lithium dendrite growth and volume changes in the anode during charging and discharging, leading to low energy density and short battery life.
Innovation Solution
A method of manufacturing a composite anode for lithium ion batteries involves forming a carbon-modified layer, adding a metal catalyst precursor solution, and performing Joule heating to create a carbon-metal catalyst composite layer, followed by impregnating lithium metal to form a predetermined thickness impregnation layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional anode structure is used, then the battery can operate, but lithium dendrites grow and volume changes occur during charging and discharging, reducing reversibility and battery life
Solution Approach 1:
The patent applies local quality by creating a composite anode structure where different materials (carbon and metal catalyst) are distributed in specific patterns and concentrations within the anode layer. The metal catalyst particles are dispersed throughout the carbon matrix, creating localized regions with enhanced lithium deposition properties that address dendrite formation at specific sites while maintaining overall structural integrity.
Solution Approach 2:
The patent employs composite materials by combining carbon material with metal catalyst particles to form a composite anode structure. This composite approach leverages the stability and conductivity of carbon while incorporating the catalytic properties of metal particles to promote uniform lithium deposition, thereby suppressing dendrite growth and reducing volume expansion during cycling.
2Reliability
If the anode volume expansion is reduced, then battery life is improved, but energy density is reduced due to low electrodeposition density
Solution Approach 1:
The patent applies parameter changes by modifying the physical and chemical parameters of the anode structure, including the size, shape, and distribution of metal catalyst particles within the carbon matrix. By optimizing these parameters, the anode achieves both reduced volume expansion and improved electrodeposition density, simultaneously addressing battery life and energy density requirements.
Solution Approach 2:
The patent creates localized regions with enhanced lithium deposition density through the strategic distribution of metal catalyst particles. These local high-density deposition zones increase the overall electrodeposition density and energy capacity while the composite structure maintains volume stability, thus improving both energy density and battery life without compromise.
3Reliability
If metal catalyst is added to carbon layer, then lithium electrodeposition density and reversibility are improved, but manufacturing process complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-synthesizing the carbon-metal catalyst composite structure before battery assembly. The metal catalyst particles are incorporated into the carbon matrix during the anode manufacturing process, creating a pre-optimized composite structure that simplifies subsequent battery assembly steps while ensuring uniform catalyst distribution and optimal electrochemical performance.
Solution Approach 2:
The patent merges multiple functions into a single composite anode structure by combining the carbon matrix and metal catalyst particles into one integrated material system. This merging eliminates the need for separate application steps for carbon coating and catalyst deposition, simplifying the manufacturing process while achieving the dual benefits of improved electrodeposition density and reversibility.
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 approach results in a composite anode with improved lithium electrodeposition density and reversibility, leading to a lithium ion battery with high capacity and enhanced life stability.
Implementation Method 1
forming a carbon-modified layer by first heat treating a carbon-supplying layer so that a surface of the carbon-supplying layer is modified
Implementation Method 2
performing Joule heating under a specific condition to obtain a carbon-metal catalyst composite layer
Data Source
AI summary
Disclosed are a method of manufacturing a composite anode for a lithium ion battery and a composite anode for a lithium ion battery manufactured thereby. According to the method provide herein, since a metal catalyst precursor is reduced using Joule heating to obtain a carbon-metal catalyst composite layer, composite anode for a lithium ion battery having a large area in a short period of time can be provided, which is excellent in terms of economic feasibility. Further, since it is possible to manufacture a composite anode for a lithium ion battery with the improved lithium electrodeposition density and reversibility of lithium ions, a composite anode for a lithium ion battery having high capacity and improved life stability can be obtained.