Silicate-Doped Silver Cathode for Reduced Battery Impedance

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Solution Overview

Problem

Traditional battery cathodes suffer from elevated impedance and internal resistance, which hinder battery performance and lead to decreased performance over charge cycles.

Innovation Solution

A silver cathode material doped with a silicate dopant, such as Li2SiO3, Na2SiO3, or ZnSi(OR)m, is used to reduce impedance and enhance battery performance, with the dopant concentration ranging from 0.01 mol % to 10 mol % and a mean particle diameter of 20 μm or less.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional cathode materials are used, then the battery can be manufactured with conventional processes, but the cathode exhibits elevated impedance and internal resistance that restrict battery performance

Engineering Contradiction:

Improvebattery performanceVSAvoidimpedance and internal resistance

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies parameter changes by doping the silver cathode material with silicate compounds at controlled concentrations (0.01-10 mol%). This chemical composition modification alters the electrical and structural parameters of the cathode, reducing impedance and internal resistance while maintaining manufacturability with conventional battery processes

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite cathode material by combining silver with silicate dopants (such as Li2SiO3, Na2SiO3, or ZnSi(OR)m). This composite structure leverages the beneficial properties of both materials: silver provides high conductivity and the silicate dopant reduces impedance, achieving improved battery performance without compromising manufacturability

Inventive Principle:

Principle #40Composite materials

2Duration of action of moving object

If traditional cathode materials are used, then the initial battery capacity can be achieved, but the capacity deteriorates significantly over charge cycles

Engineering Contradiction:

Improvecycle lifeVSAvoidcapacity retention

Core Design Contradiction:

Duration of action of moving objectVSReliability

Solution Approach 1:

The patent applies preliminary action by pre-doping the silver cathode material with silicate compounds before battery assembly. This preparatory modification establishes a stable crystal structure and optimized electrical properties in advance, enabling the cathode to maintain at least 70% of its rated capacity over 50 charge cycles without deterioration

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS9799886B2Cathode with silver material and silicate dopant and method of producing

Publication Date: 2017.10.24 RIOT ENERGY INC

AI summary

The present invention provides novel cathodes having a reduced resistivity and other improved electrical properties. Furthermore, this invention also presents methods of manufacturing novel electrochemical cells and novel cathodes. These novel cathodes comprise a silver material that is doped with a silicate material.