source:other news release time:2022-12-28 Hits: Popular:Lithium-ion battery wholesale
There are many kinds of active materials that can be used as the cathode of lithium ion batteries, mainly including carbon based cathode materials, silicon based and tin based cathode materials, lithium titanate cathode materials, etc. Different types of carbon materials have different electrochemical properties. Among them, graphite has the advantages of high conductivity, excellent layered structure, and high crystallinity, which is more suitable for lithium insertion and removal. At the same time, graphite materials are affordable and have a large stock, so they are widely used.
When the lithium ion battery is charged and discharged for the first time, solvent molecules will decompose on the graphite surface and form a passive film called SEI. This reaction will lead to the loss of battery capacity and is an irreversible process. In the overcharge process of lithium ion battery, metal lithium deposition will occur on the negative electrode surface, which is easy to occur when the positive active material is excessive relative to the negative active material. At the same time, lithium metal deposition may also occur under high magnification conditions.
In general, the formation of metal lithium leads to the change of lithium battery capacity attenuation mainly due to the following aspects: First, the amount of recyclable lithium in the battery decreases; Second, lithium metal reacts with electrolyte or solvent to form other by-products; Third, lithium metal is mainly deposited between the negative electrode and the diaphragm, which causes the pore of the diaphragm to be blocked, resulting in an increase in the internal resistance of the battery. Different graphite materials have different influence mechanisms on the capacity attenuation of lithium ion batteries. The specific surface area of natural graphite is relatively high. Therefore, the capacity of lithium battery will be lost if self discharge reaction occurs. As the battery cathode, the electrochemical reaction impedance of natural graphite is also higher than that of artificial graphite. In addition, the dissociation of the layered structure of the negative electrode during the cycle, the dispersion of the conductive agent during the fabrication of the electrode sheet, and the increase of the electrochemical reaction impedance during the storage process are all important factors that lead to the capacity loss of the lithium battery.
Read recommendations:
lithium batteries for solar panels
100kwh Lithium Iron Phosphate Battery Rechargeable 380V For Solar Energy Storage
How to look at the battery capacity.lithium marine batteries manufacturer
What is a robot lithium battery?12v 100ah deep cycle battery
Last article:Polymer lithium battery
Next article:What are the characteristics of security patrol robots?
related suggestion
lithium trolling motor battery direct sales
2023-04-07lithium batteries for boats company
2023-03-22solar power battery storage company
2023-04-07deep cell marine battery Vendor
2023-03-20dual purpose marine battery manufacturer
2023-03-20deep cycle trolling motor battery manufacturer
2023-04-0712v 200ah
2023-05-0812 volt deep cycle marine battery
2023-05-08lithium boat batteries
2023-05-08lifepo4 power station
2023-05-08portable power station solar
2023-05-08best solar powered generator
2023-05-0818650 26650 Low Temperature Lithium Ion Battery Cell
2023-02-1451.2V 800Ah 600Ah 200Ah 100Ah Modular Stackable Rack Mount Energy Storage System
2023-02-2115S 48V 100Ah LiFePo4 Battery for Home Energy Storage Solar System
2023-06-19Lithium Polymer Battery Pack for Smart Home Device
2023-02-1451.2V Modular Stacking Rack Mount Energy Storage System
2022-10-19Causes of lithium battery expansion
2022-11-02What are the common lithium battery low temperature heating technology?
2023-02-17Does a Solar Powered Generator Work in the Winter?
2022-09-07What are some ways to extend the life of your home battery?
2022-10-28Parallel equalization charging method for lithium battery packs.lithium golf cart batteries
2023-10-10Aluminum air batteries cannot replace the cause of lithium batteries analysis.solar powered electric
2023-03-08Lithium battery pack process combination method.best battery for home inverter
2023-08-02Discharge characteristics of Lithium iron phosphate power battery.lithium boat batteries
2023-07-20The difference between lead -acid batteries and lithium ion batteries.36 volt golf cart batteries
2023-06-06What are the characteristics of low -temperature lithium batteries?deep cycle trolling motor battery
2023-04-25