Metal Nanowire Anode Coating for Solid-State Battery Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Silicon-based anode active materials in all-solid-state batteries experience volume changes during charging and discharging, leading to detachment from the anode current collector and poor electrical conductivity, which reduces charging efficiency and capacity.
Innovation Solution
An anode with a coating layer formed by entangling metal nanowires on the current collector, where the pores are filled with a portion of the anode material, enhancing adhesive strength and electrical conductivity while reducing the need for excessive binder and conductive material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the content of binder is increased to prevent detachment of silicon-based anode active material, then adhesive strength is improved, but resistance of the anode increases and capacity is reduced
Solution Approach 1:
A coating layer comprising metal nanowires is introduced as an intermediary between the silicon-based anode active material and the anode current collector. This coating layer provides mechanical support and maintains adhesive strength without requiring increased binder content, thereby preventing detachment during volume changes while maintaining low resistance and high capacity.
Solution Approach 2:
The anode structure is designed as a composite system combining silicon-based anode active material, metal nanowires, conductive material, and binder. The metal nanowires in the coating layer provide both mechanical reinforcement and electrical conductivity, allowing the system to achieve high adhesive strength without increasing binder content, thus resolving the contradiction between strength and resistance.
2Reliability
If the content of conductive material is increased to compensate for low electrical conductivity, then electrical conductivity is improved, but dispersibility of components decreases due to aggregation
Solution Approach 1:
Metal nanowires are introduced as an intermediary conductive network within the coating layer. These nanowires provide efficient electron transport pathways without requiring high concentrations of conventional conductive materials, thereby maintaining high electrical conductivity while preventing aggregation and ensuring uniform dispersibility of all components in the anode.
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 solution provides excellent adhesive strength and electrical conductivity, preventing detachment and improving charging efficiency and capacity of the anode in all-solid-state batteries.
Implementation Method 1
pores formed by entangling metal nanowires
Implementation Method 2
obtaining a coating layer including pores formed by forming the metal nanowires on the anode current collector by heat-treating the intermediate
Data Source
AI summary
Disclosed are an anode for all-solid-state batteries which has a coating layer located on an anode current collector and including pores formed by entangling metal nanowires, and a method of manufacturing the same.