Zinc Electrode Composition for Stable Voltage Profile
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Solution Overview
Problem
Electrochemical cells with zinc electrodes face challenges in maintaining a stable voltage profile, especially during pulsed discharge, which affects their performance and storage stability.
Innovation Solution
Incorporating a proportion of aluminum hydroxide and/or aluminate into the zinc electrodes, along with a binder, conductive agents, and optional corrosion inhibitors, to enhance the electrochemical properties and stability of the cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If aluminum hydroxide and aluminate are added to zinc electrodes, then voltage profile stability and storage stability are improved, but electrode composition complexity increases
Solution Approach 1:
The patent applies composite materials by combining zinc powder with aluminum hydroxide and aluminate compounds to create a composite electrode material. This composite structure allows the electrode to maintain stable voltage profiles during discharge while improving storage stability, as the aluminum-containing compounds modify the zinc matrix properties without compromising the overall electrode performance
Solution Approach 2:
The patent utilizes parameter changes by controlling the particle size distribution, pH value, and chemical composition ratios of the aluminum hydroxide and aluminate additives. By optimizing these parameters, the electrode achieves enhanced voltage stability during pulsed discharge cycles while managing the complexity of the multi-component system
2Duration of action of stationary object
If aluminum hydroxide and aluminate are added to zinc electrodes, then storage stability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-synthesizing and characterizing the aluminum hydroxide and aluminate additives before electrode fabrication. The raw materials are pre-mixed and pre-characterized for particle size, surface area, and chemical composition, which simplifies the subsequent electrode manufacturing process while ensuring consistent storage stability performance
Solution Approach 2:
The patent controls manufacturing complexity by optimizing parameters such as the mixing ratio of zinc powder to aluminum compounds, the pH of the slurry during fabrication, and the drying temperature. These parameter optimizations enable the incorporation of multiple additives while maintaining a relatively simple and scalable manufacturing 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 addition of aluminum hydroxide and aluminate improves the voltage profile and storage stability of zinc-based electrochemical cells, particularly during pulsed discharge, leading to more consistent energy delivery and longer storage life.
Implementation Method 1
All of these modifications react under the influence of bases to form aluminates, in which aluminum is present in the form of a complex anion
Implementation Method 2
Electrochemical cells with an electrode made of zinc or a zinc alloy
Data Source
Figure 1a~1b
AI summary
Electrochemical cell of button-cell type, comprises an electrode comprising zinc or a zinc alloy, aluminum hydroxide and/or at least one aluminate. An independent claim is also included for manufacturing the electrochemical cell, comprising manufacturing the electrode by mixing zinc powder or zinc-containing powder with aluminum hydroxide and/or the aluminate and optionally with an electrode binder, a conductivity-improving additive and/or a corrosion inhibitor.