Titanium Oxide Separator Structure for Zinc Dendrite Suppression
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Solution Overview
Problem
Zinc secondary batteries face short circuiting due to zinc dendrite growth from the negative electrode reaching the positive electrode, which existing technologies have not adequately inhibited.
Innovation Solution
A separator for zinc secondary batteries is designed with a porous substrate layer and a titanium oxide-containing porous layer, where the titanium oxide is represented by TixOy (0<x, 0<y, and y<2x), laminated in specific configurations to inhibit zinc dendrite growth by diffusing current and preventing electrostatic approach of Zn(OH)42- ions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the separator structure is simplified, then manufacturing is easier, but the ability to inhibit short circuiting is insufficient
Solution Approach 1:
The separator is divided into two functional layers: a porous substrate layer that provides mechanical strength and basic separation function, and a titanium oxide-containing porous layer that specifically inhibits zinc dendrite growth. This segmentation allows each layer to be optimized for its specific function while maintaining manufacturing simplicity through a straightforward lamination process.
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 separator effectively inhibits short circuiting by diffusing zinc deposition in the titanium oxide layer and repelling Zn(OH)42- ions, thereby enhancing the durability and cycle stability of zinc secondary batteries.
Implementation Method 1
diffusing zinc deposition in the titanium oxide layer
Implementation Method 2
repelling Zn(OH)42- ions
Data Source
AI summary
The present disclosure provides a separator for a zinc secondary battery that can inhibit short circuiting in a zinc secondary battery. The separator for a zinc secondary battery of the disclosure has a porous substrate layer and a titanium oxide-containing porous layer laminated onto the porous substrate layer, wherein the titanium oxide-containing porous layer comprises a titanium oxide represented by TixOy, where 0<x, 0<y, and y<2x. The titanium oxide may be TiO, Ti2O, Ti2O3, Ti3O, Ti3O5, Ti4O5, Ti4O7, Ti5O9, Ti6O, Ti6O11, T17O13, T18O15 or T19O17.