Lithium Battery 3.7V Lithium Polymer Battery 3.2V LifePo4 Battery 1.2V Ni-MH Battery Button Coin Battery
3.7V Battery Pack 7.4V Battery Pack 11.1V Battery Pack 14.8V Battery Pack Other Battery Pack
Sino Science&Technology Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of Lifepo4 batteries,energy storage battery,portable UPS power supply,personalized customization lithium battery pack etc .
Environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery,3.7V lithium polymer battery, NiMH battery , NiCD battery ,Lead acid battery,dry cell battery ,alkaline battery ,heavy duty battery, button cell battery etc. we devote to R&D,innovation ,production & sales
Shenzhen Green Power Energy Battery Co.,ltd specializes in a wide range of digital battery such as environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery, 3.7V lithium polymer battery, NiMH battery, NiCD battery, dry cell battery, alkaline battery, heavy duty battery, button cell battery etc. we devote to R&D, innovation, production & sales. With automatic production machines we have been exported goods to all over the world over 15years. We have complete exported certificate such as KC, CE, UL, BSCI, ROHS, BIS, SGS, PSE etc
Dongguan Datapower New Energy Co.,ltd is a high-tech production enterprise which specialize in the R&D and production&sale of lithium polymer batteries,drone battery,airplane batteries &battery pack etc.
Anhui Seong-hee New Energy Technology Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of primary batteries. And mainly produces and sells alkaline batteries & carbon zinc batteries. there are size AA, AAA, C, D, 9V etc
Guizhou STD Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production & sale of lithium polymer batteries, drone battery, airplane batteries & battery pack etc.
release time:2024-03-12 Hits: Popular:AG11 battery
The article analyzes the mechanism of the influence of graphite anode materials on the fast charging performance of lithium-ion batteries, prepares a series of graphite anode materials with different coke raw materials, conducts particle size, polarization and XRD tests on them, and makes lithium-ion batteries for rate testing. Charging and rate cycle testing.
The article analyzes the mechanism of the influence of graphite anode materials on the fast charging performance of lithium-ion batteries, prepares a series of graphite anode materials with different coke raw materials, conducts particle size, polarization and XRD tests on them, and makes lithium-ion batteries for rate testing. Charging and rate cycle testing. The results show that graphite materials prepared from coke raw materials with better orientation have better fast charging performance. A high-energy-density fast-charging lithium-ion battery was made using the improved graphite anode, and the capacity retention rate reached more than 86% in a 6C/1 rate cycle test for 300 weeks.
introduction
Since its inception, lithium-ion batteries have been widely used in many fields. From the current point of view, lithium-ion batteries are not only widely used in electronic products such as mobile phones, digital cameras, tablets, etc., but have also made certain breakthroughs in the field of vehicle power supply; judging from the future market demand for lithium-ion batteries: fast charging type Lithium-ion batteries will become an important direction for lithium-ion batteries.
In order to improve the fast charging performance of graphite anode materials, this paper experimentally prepared a series of graphite anode materials made from different coke raw materials, and conducted particle size, polarization and XRD tests on them to make lithium-ion batteries for rate charging and rate charging. Loop test. And the test results were analyzed.
Analysis of the fast charging mechanism of lithium-ion batteries and the impact of graphite on fast charging of lithium batteries
Taking lithium cobalt oxide as the positive electrode and graphite as the negative electrode as an example, the reactions of the positive and negative electrodes when charging a lithium-ion battery are as follows:
Positive electrode reaction equation: LiCoO2→Li1-xCoO2+xLi+xe-
Negative electrode reaction equation: xLi+xe-+6C→LixC6
When a lithium-ion battery is being charged, part of the Li+ in lithium cobalt oxide breaks away from the crystal lattice and enters the electrolyte, and then migrates (embedded) into the crystal lattice of the negative active material carbon to generate a LixC compound.
During this process, lithium ions migrate and diffuse from the positive electrode to the negative electrode under the action of the electric field and concentration gradient, and undergo liquid phase diffusion in the solution, electrochemical reaction on the graphite surface, and solid phase diffusion in the graphite.
The solid-phase diffusion coefficient of lithium inside graphite is relatively small (usually only about 10-10cm2.s-1), which makes the solid-phase diffusion of lithium inside graphite easily become the control step of the entire electrode reaction. Therefore, improving graphite materials and increasing the solid-phase diffusion of lithium in graphite can effectively reduce the risk of battery polarization and lithium precipitation, and improve the fast charging performance of lithium-ion batteries.
Preparation of graphite
Preparation of artificial graphite from different coke raw materials: Select different coke raw materials a, b, and c respectively. After pulverization and sieving, perform high-temperature graphitization at 2800°C. The temperature rise rate is 15°C/min, constant temperature. Time: 5 hours. The high-temperature treated material is sieved through a 250-mesh screen to obtain artificial graphite A, B, and C. The physical and chemical indicators of different artificial graphite materials are shown in Table 1.
Withdraw power assembly
Take the CR2016 button battery shell, drop electrolyte into the positive shell, and then put in the negative electrode sheet, separator (drop electrolyte on the negative electrode sheet and separator respectively), processed lithium sheets, nickel foam, and stainless steel sheets , cover the negative electrode shell to seal the battery, and make a CR2016 button battery.
Full battery assembly
Mix lithium cobalt oxide, PVDF, conductive agent carbon black SuperP and solvent NMP with a mass ratio of 96.5:1.5:2, and then coat them on a 16 μm thick aluminum foil; mix artificial graphite with a mass ratio of 96:3:1, The binder (sodium carboxymethyl cellulose CMC, styrene-butadiene rubber SBR = 1:1) and the conductive agent carbon black SuperP were mixed with the solvent deionized water and then coated on a 10 μm thick copper foil. The coated positive and negative electrode sheets undergo processes such as sheeting, winding, drying, liquid injection, sealing, formation, and volume separation to make the 554065 soft-pack lithium-ion battery.
Read recommendations:
Lithium iron phosphate batteries are also ternary lithium batteries.solar energy storage system batt
Last article:r03 battery.Analysis of lithium battery safety and monitoring technology
Next article:Nickel Hydride No. 5 battery.Technical analysis of new energy vehicles: plug-in hybrid vs pure elect
Popular recommendation
connector for energy storage battery Manufacturing
2023-05-10cabinet type energy storage battery wholesaler
2023-05-10Ni-MH battery packs Manufacturing
2023-03-22lithium ion phosphate battery 3.2v
2023-03-22energy storage battery guangdong direct sales
2023-05-103.2V 100Ah
2022-10-12Coin Battery CR 1225
2022-09-27505060 2000mAh 7.4V
2022-08-19R20
2022-08-19R6P
2022-12-01L1022 10A
2022-10-09LR20
2022-08-19102540 1100MAH 3.7V
2023-06-12801620 180mAh 3.7V
2022-08-19LR6
2022-08-19L1022 battery
2023-06-2518650 3.7v battery
2023-06-25LR44 battery
2023-06-25902030 battery
2023-06-2518650 lithium ion battery 3.7v
2023-06-25Where does the battery come from the electrical
2022-06-18Laptop battery calibration
2024-05-07Lithium battery manufacturers explain what is the use of lithium ion batteries?lithium iron phosphat
2023-03-17Negative electrode materials for lithium batteries.CR2450 battery
2023-08-16Knowledge of Forklifts and Forklift Batteries
2024-05-24Lithium battery charging and discharging cycle
2023-07-27Nickel cobalt lithium manganate (NMC).cabinet type energy storage battery manufacture
2023-04-18What are the main materials for lithium battery manufacturers?lifepo4 battery for solar energy stora
2023-03-22Research content of battery management system.2025 button cell battery
2023-09-18Lithium battery structure battery cell.802540 polymer battery
2023-06-09