Michael Liao’s Post

Share knowledge The reason why aluminum electrolytic capacitors have life problems is because of the electrolyte. This electrolyte will decompose by itself to produce gas, and will also react chemically with the oxide film to produce gas. This phenomenon is very surprising during normal use. The loss of electrolyte will cause the parameters of the electrolytic capacitor to change. When the electrostatic capacity, loss tangent value, and leakage current of the aluminum electrolytic capacitor exceed the specified value, we say that the life of the electrolytic capacitor has expired. Therefore, the faster the electrolyte is lost, the shorter the life of the electrolytic capacitor. And this chemical reaction is mainly related to temperature.

The basic corrosion cell comprises an anode where metal atoms release electrons, a cathode where these electrons combine with oxidizing agents in the electrolyte, and a metallic path through which electrons flow. This electrochemical process accelerates corrosion by facilitating the transfer of electrons and ions, leading to the degradation of the metal. Understanding this fundamental mechanism is essential for developing effective strategies to prevent or mitigate corrosion in various industries and applications.

Lithium cells can be damaged by overdischarging, which means running them below their safe minimum voltage. Here's what happens inside a lithium cell during overdischarge: * **Electrolyte Breakdown:** The electrolyte is a critical component that allows lithium ions to flow between the electrodes. During overdischarge, the electrolyte can break down and decompose, forming gases that build pressure inside the cell. * **Solid Electrolyte Interface (SEI) Damage:** A protective layer called the SEI forms on the anode during normal operation. Overdischarge can cause this layer to break down, exposing the anode to the electrolyte and leading to further degradation. * **Lithium Plating:** Lithium ions can plate onto the anode surface during extreme overdischarge. This metallic lithium can hinder future lithium movement and reduce the cell's capacity. * **Anode and Cathode Damage:** The continual flow of current during overdischarge can strain the anode and cathode materials, causing them to break down and lose performance. * **Pressure Increase:** The gas generation and breakdown of materials can lead to a pressure increase inside the cell, potentially causing the cell to vent or even rupture in severe cases. Overall, overdischarge can significantly reduce a lithium cell's lifespan and performance. In extreme cases, it can pose safety hazards. For lithium cell safety and longevity, it's important to avoid overdischarging them. Most lithium batteries have built-in circuitry to prevent this by cutting off power before the voltage drops too low.

Lesson 5: Always Read Instructions Read Instructions Carefully: When answering any questions, always read the instructions thoroughly. Follow Specific Directions: Naming: When asked to name, please provide the name. Chemical Symbols: When asked to write in chemical symbols, use the appropriate chemical notation. Presenting Differences: Use Tables for Comparisons: When asked to state the difference between two items, always draw a table for clarity. Stay on Topic: If discussing a specific point, do not jump to another point prematurely. Example: Electrochemical vs. Electrolytic Cell Differences S/n Electrochemical cell Electrolytic cell 1 Chemical reaction produces electricity Electric current/electricity is used to produce chemical reaction 2 The anode is negative electrode The anode is Positive electrode 3 The cathode is positive electrode The cathode is negative electrode

An ammonia ion sensor is an electrochemical sensor used to detect the concentration of ammonia ions (NH₄ +) in water. Ammonia nitrogen forms ammonia ions in water (NH₄ +). When the selective membrane of the ammonia ion sensor is in contact with a solution containing ammonia ions, the ammonia ions will undergo a specific chemical reaction on the membrane. For example, in some sensors, ammonia ions are oxidized or reduced, resulting in the transfer of electrons. This electron transfer creates a current signal or potential change at the sensor's electrodes, and the signal is proportional to the concentration of ammonia ions in the solution. By measuring this current or potential signal, and according to the relevant algorithm and calibration curve, it can be converted into the concentration value of ammonia ions. Email:sales07@luminsens.com Whatapp:86-13361271601 #NH₄+sensor#wwtp#etp#waterqualityanalyzer#dosensor#phsensor#codsensor

Factors affecting rate of chemical reaction: : 1) Concentration of reactants (95-% accuracy system for public segments, 85-% accuracy instrument for personal) 2) Pressure (sensor) 3) Temperature (sensor) 4) Catalyst (system) 5) Nature of reactants (system) 6) Orientation of reacting species 7) Surface area (system) 8) Intensity of light (sensor) 9) Nature of solvent (system) https://lnkd.in/g4NhhERN

The presence of valence electrons can determine the element's chemical properties and whether it may bond with other elements. Learn more: https://buff.ly/4iMxfDF #ValenceElectron #ChemicalBonds #AtomicStructure #OuterShell #Corrosionpedia

The working principle of lithium battery is to use the electrochemical potential difference between anode and cathode materials to make lithium ions move directionally in electrolyte and electrons in external circuit, thus forming current. The cathode material of lithium battery is generally a compound containing lithium ions, such as Ferrous lithium phosphate and lithium ternary, and the cathode material is generally graphite or other carbon materials. There is a diaphragm between the anode and cathode, which only allows lithium ions to pass through, but not electrons. When charging, lithium ions move from the positive electrode to the negative electrode, and electrons go from the positive electrode to the negative electrode through the external circuit; During discharge, lithium ions move from the negative electrode to the positive electrode, and electrons pass through the external circuit from the negative electrode to the positive electrode.

In button batteries, Electrolytic Manganese Dioxide (EMD) functions as the cathode, providing stable energy release and boosting longevity through sustained electrical performance.

Lithium precipitation caused by poor electrolyte infiltration. #batterytechnology #batterymanufacturing #batterymaterials #electrolytes #electrolyteinjecting #cathode #anode #energystorage #energyefficiency #lithiumprecipitation Electrolyte serves as a channel for lithium ion conduction. If the amount of electrolyte is small or fails to fully saturate the electrodes, lithium plating will occur. This issue is relevant to the public account of battery management system (BMS) for power batteries. Principle: When the amount of electrolyte is small, the migration path of lithium ions between the anode and cathode is obstructed, resulting in grained unlithiated areas or lithium precipitation areas. Characteristics: If lithium ions cannot migrate to the anode, grained unlithiated areas will form at that location. If lithium ions migrate to the anode but fail to embed into the anode, lithium precipitation will occur. Improvement: Calculate the amount of electrolyte to be injected based on the porosity of the electrode films, separator, and the density of the electrolyte. The principle of "more rather than less" should be adopted in designing the electrolyte injection amount.