Nickel-Iron Battery Anode Lithopone Additive
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Solution Overview
Problem
Nickel-Iron batteries have a low energy throughput due to their inherently low discharge voltage, which limits their cycle life and capacity, despite having a high cycle life, and increasing battery size to accommodate more active material results in lower energy density and higher costs.
Innovation Solution
Incorporating an electro-conductive additive, such as Lithopone, into the iron oxide anode to enhance discharge voltage and capacity without adding additional active material, thereby improving energy density and throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the interior volume of the battery is increased to accommodate more active material, then discharge capacity and voltage are improved, but energy density decreases and cost increases
Solution Approach 1:
The patent changes the chemical parameters of the anode by incorporating iron oxide (Fe3O4) as an additive material, which alters the electrochemical properties to achieve higher discharge capacity without increasing battery volume. This parameter change in material composition enables improved performance within the same physical constraints.
Solution Approach 2:
The patent creates a composite anode structure by combining traditional iron material with iron oxide additive. This composite material approach allows the system to achieve enhanced discharge capacity and voltage characteristics while maintaining the original battery size, effectively resolving the contradiction between capacity and volume.
2Power
If electro-conductive additive is used to enhance discharge voltage, then energy density and throughput are improved, but manufacturing complexity increases
Solution Approach 1:
The patent modifies the electrical parameters of the anode by adding iron oxide, which changes the discharge voltage characteristics. This parameter change achieves higher power output while the manufacturing process remains relatively simple, as the additive is incorporated during standard electrode fabrication.
Solution Approach 2:
The iron oxide acts as an intermediary material that facilitates improved electron transfer and discharge voltage. Rather than fundamentally changing the manufacturing process, this intermediary additive is integrated into the existing production workflow, minimizing the increase in manufacturing complexity while achieving the desired electrical performance improvement.
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 use of electro-conductive additives like Lithopone increases the discharge voltage and cycle life of Nickel-Iron batteries, leading to higher energy throughput and energy density, addressing the limitations of low discharge capacity and high cost associated with larger battery sizes.
Implementation Method 1
The anode contains an active material that can be oxidized
Implementation Method 2
The cathode contains an active material that can be reduced
Implementation Method 3
The electrolyte in contact with both anode and cathode contains ions that flow through the separator between anode and cathode to maintain charge balance throughout the battery during charge and discharge
Data Source
AI summary
A nickel iron battery comprising a housing, an electrolyte solution contained within the housing, an anode comprising iron configured to be retained within the housing and the electrolyte solution, an cathode comprising nickel configured to be retained within the housing and the electrolyte solution, and a separator configured to be retained within the hosing and the electrolyte solution, wherein the separator is interposed between the cathode and the anode.