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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 .
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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:2024-07-02 Hits: Popular:AG11 battery
The composition of the electrolyte not only determines the ion conductivity of the electrolyte, but also affects the formation of the SEI membrane. The properties of SEI membranes, such as pore stability, electronic and ionic conductivity, have a significant impact on the irreversible capacity, low-temperature performance, cycling performance, and safety performance of batteries. A good SE1 film should have organic solvent insolubility, allowing for relatively free entry and exit of the electrode while solvent molecules cannot penetrate, thereby preventing the co insertion of solvent molecules from damaging the electrode and improving its cycling life. Smart et al. found through their study of the impedance of Li/graphite half cells that the SEI film resistance is much greater than the electrolyte resistance, and when the temperature is below -20 ℃, the SEI film resistance increases sharply with the decrease of temperature, corresponding to the rapid deterioration of battery performance. Wang et al. investigated the low-temperature performance of graphite electrodes in a quaternary electrolyte system of 1.0mol/LLIPF/(EC: PC: DMC: EMC) (volume ratio 4:1:3:2) 1 using constant current intermittent titration and electrochemical impedance spectroscopy. The study showed that at -30 ℃, a larger SEI film resistance led to greater battery polarization, resulting in shorter platform voltages for lithium rich phases such as Li. C, LiC, and LiC, without complete phase transitions, and only limited lithium was embedded in the graphite negative electrode, resulting in poor low-temperature performance of the graphite electrode. Therefore, adding an appropriate amount of film-forming additives to the electrolyte of lithium-ion batteries can reduce the SEI film resistance and improve the low-temperature performance of the battery.
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