Core-Shell Electrode Binder Balancing Adhesion and Resistance

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing binders for rechargeable lithium batteries offer high adhesive strength but suffer from high resistance, which negatively impacts battery performance.

Innovation Solution

A core-shell structured particle-shaped binder and a linear binder are combined, each with specific structural units, to achieve high adhesive strength and low resistance, enhancing the performance of rechargeable lithium batteries.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a binder with high adhesive strength is used, then the adhesive strength is improved, but the resistance increases

Engineering Contradiction:
Improveadhesive strengthVSAvoidresistance
Core Design Contradiction:
StrengthVSObject-affected harmful factors

Solution Approach 1:

The patent uses a composite binder system comprising both particle-shaped binder and flake-shaped binder with specific molecular weight ranges. This composite approach allows the particle-shaped binder to provide adhesive strength while the flake-shaped binder contributes to low resistance, resolving the contradiction between high adhesive strength and low resistance simultaneously

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The patent specifies precise parameter ranges for the binders including molecular weight (particle-shaped: 10,000-100,000; flake-shaped: 50,000-500,000) and particle size (1-10 μm). By optimizing these parameters within defined ranges, the binder achieves both high adhesive strength and low resistance, transforming the trade-off into a controlled optimization problem

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUS20260058153A1Binder for lithium rechargeable battery, electrode including the same, and lithium rechargeable battery including the same
Publication Date: 2026.02.26 SAMSUNG SDI CO LTD
  • US20260058153A1 patent drawing
  • US20260058153A1 patent drawing
  • US20260058153A1 patent drawing

AI summary

Examples of the disclosure include a binder for a rechargeable lithium battery, and an electrode and a rechargeable lithium battery including the binder, the binder including a core-shell structured particle-shaped binder and a linear binder, wherein at least one of the core-shell structured particle-shaped binder and the linear binder includes a desired structural unit.