Lithium Battery Electrode Coating for Uniform Conductive Networks

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Solution Overview

Problem

The uneven distribution of material components during the manufacturing process of lithium secondary battery electrodes leads to capacity loss and diminished output characteristics due to decreased or uneven conductivities.

Innovation Solution

An electrode for a lithium secondary battery comprising an electrode active material with a core particle coated by conductive particles and a fibrous conductive material, with a specific ratio of conductive particles to fibrous conductive material, forms a uniform electron-conductive network, enhancing ionic and electrical conductivities.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If multiple material components are used to prepare an electrode, then the electrode can achieve high capacity and output performance, but the components may be distributed unevenly during manufacturing, resulting in capacity loss and diminished output characteristics

Engineering Contradiction:

Improveoutput performanceVSAvoiduniformity of component distribution

Core Design Contradiction:

PowerVSManufacturing precision

Solution Approach 1:

The patent combines multiple conductive materials (acetylene black particles and carbon nanotubes) into a single integrated electrode structure where they work synergistically. The acetylene black provides baseline conductivity while the carbon nanotubes form a three-dimensional conductive network that enhances electron transport pathways, achieving high output performance without compromising manufacturing uniformity

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The electrode employs a composite material system consisting of electrode active material, acetylene black conductive particles, and carbon nanotube fibrous material. This composite structure leverages the complementary properties of different materials to achieve both high capacity and uniform component distribution, resolving the contradiction between performance enhancement and manufacturing precision

Inventive Principle:

Principle #40Composite materials

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 improves the migration of lithium ions and electrons, resulting in enhanced output characteristics and energy density of the lithium secondary battery.

Implementation Method 1

The electrode for a lithium secondary battery may comprise a conductive material to increase electronic conductivity

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 2

The electrode for a lithium secondary battery may comprise a solid electrolyte to increase lithium-ion conductivity

Methodology Applied

Scientific EffectIonic conduction: Conduction (electrical)

Data Source

PatentUS20260051483A1Electrode For Lithium Secondary Battery and Method for Manufacturing the Same

Publication Date: 2026.02.19 SK ON CO LTD

AI summary

According to embodiments of the present disclosure, an electrode for a lithium secondary battery comprises an electrode active material layer comprising an electrode active material, a solid electrolyte and a fibrous conductive material. The electrode active material comprises a core particle, and a coating that covers at least a portion of a surface of the core particle and comprises conductive particles. The ratio of the content of the conductive particles to the content of the fibrous conductive material is 0.01 to 2.0 based on the total weight of the electrode active material layer. According to embodiments of the present disclosure, a lithium secondary battery comprising the above-described electrode for a lithium secondary battery may be provided.