Aqueous Zinc Battery Anode Dendrite Suppression via Lead Additive
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Solution Overview
Problem
Aqueous secondary batteries with zinc anodes face dendrite growth issues, affecting cycle life and charge/discharge capacity due to the lack of effective solutions in preventing dendrite formation.
Innovation Solution
Incorporating a lead-containing substance on the anode surface or in the electrolyte solution, with a mass ratio of lead not exceeding 1000 ppm, to inhibit dendrite growth, and using a modified lithium manganese oxide material with a spinel structure and a specific surface area of 0.1-1.0 m2/g to enhance electrochemical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If zinc ions are used as the anode active substance in an aqueous secondary battery, then the battery achieves high energy density and environmental friendliness, but dendrite growth occurs during charging/discharging which affects cycle performance and charge/discharge capacity
Solution Approach 1:
A lead-containing substance is introduced as an intermediary component on the anode surface or in the electrolyte solution. This intermediary modifies the interface between zinc ions and the anode, controlling the deposition process to prevent dendrite formation while maintaining high energy density and cycle performance
Solution Approach 2:
The invention changes the chemical composition parameters by adding lead-containing substances at controlled concentrations (mass ratio not greater than 1000 ppm). This parameter modification alters the electrochemical behavior at the anode interface, suppressing dendrite growth while preserving the battery's high energy density characteristics
2Duration of action of stationary object
If lead-containing substance is added to inhibit dendrite growth, then cycle life is improved, but the complexity of battery composition increases
Solution Approach 1:
The invention modifies the battery composition by introducing lead-containing substances at precisely controlled low concentrations (not greater than 1000 ppm). This controlled parameter change extends cycle life while minimizing the increase in compositional complexity, as the lead additive is incorporated in trace amounts rather than as a major component
Solution Approach 2:
The lead-containing substance functions as a sacrificial or consumable component that modifies the electrochemical environment temporarily. It is added in small quantities to achieve the dendrite suppression effect during the battery's operational life, after which it may be depleted or transformed, simplifying long-term composition management
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 lead-containing substance effectively inhibits dendrite growth, improving the cycle life and electrochemical performance of the battery, while the modified lithium manganese oxide material reduces side reactions and self-discharge, leading to enhanced cycle and float charging performance.
Implementation Method 1
the second metal ions can be reduced and deposited as a second metal at the anode, and the second metal can be oxidized and dissolved back to the second metal ions; a lead-containing substance is provided on a surface of the anode active substance and/or in the electrolyte solution
Implementation Method 2
using a modified lithium manganese oxide material with a spinel structure and a specific surface area of 0.1-1.0 m2/g to enhance electrochemical performance
Implementation Method 3
A reversible intercalation/deintercalation reaction can occur at a cathode of the aqueous secondary battery based on first metal ions
Implementation Method 4
a reversible reduction depositive and oxidative dissolution reaction can occur at a anode based on second metal ions
Data Source
AI summary
A battery, including a cathode, an anode, and an electrolyte solution. The cathode includes a cathode active substance and a cathode current collector. The electrolyte solution includes first metal ions and second metal ions. In a charging/discharging process, the first metal ions can be reversibly deintercalated-intercalated at the cathode, the second metal ions can be reduced and deposited as a second metal at the anode, and the second metal can be oxidized and dissolved back to the second metal ions. The anode includes a anode active substance and a anode current collector. A lead-containing substance is provided on a surface of the anode active substance and/or in the electrolyte solution. A mass ratio of lead in the lead-containing substance to the battery is not greater than 1000 ppm.