According to foreign media reports, when the winter climate is cool, the vehicle is often easy to go wrong.Electric car also has a similar situation, when the temperature dropped to freezing point, the lithium-ion battery power will be lost.Nowadays, researchers have provided a new strategy, Used to circumvent the plunging battery kinetics, a battery system was studied that employed a hard-to-cool hard carbon anode and a powerful lithium-rich cathode.
'Non-graphitizable' or 'hard' carbon is a low-cost electrode material in the battery and is quite marketable, demonstrating its rapid intercalation at low temperatures kinetics of lithium ions. During charging and discharging of the battery, lithium ions may move from the anode to the cathode through the electrolyte, and vice versa.
If the anode material (anode material) is usually graphite, can accommodate pre-stored lithium-ion, when lithium ions into the volume will change, to ensure longer battery life, charging and discharging can be rapid reaction power It has now been proven that Prelithiated hard carbon is a powerful lithium-ion capacitor material, however, the pre-lithiation process is complicated and expensive, involving pure lithium electrodes.
In contrast to the search for other lithium electrodes, the researchers introduced a lithium-rich vanadium phosphate cathode that can be used for lithiation and conventional battery operations. During the first charge, lithium ions flow from the cathode to the anode During this process, some lithium ions are lost, during which time the lithium ions are embedded and stored, and then the researchers have reduced lithium ion vanadium phosphate cathodes and pre-lithiated hard carbon anodes (LixC) to form lithium-ion batteries According to the researchers, the battery retains the high energy density of conventional lithium-ion batteries while showing the same high capacity and long life as supercapacitors.
In addition, at minus 40 degrees Celsius, its power reserves account for 2/3 of the total. In contrast, the conventional lithium battery power reserves of only 10% .This is mainly due to the natural characteristics of vanadium phosphate cathode and pre Rapid Reaction Kinetics of Lithium-Fluoride Hard Anodes Now, researchers are conducting further tests to enhance other parameters of the electrochemical cell.
However, there is a flaw in the product that will lose its electrolyte in extremely cold conditions, and if this problem is to be solved, the battery system may provide an attractive product design that will optimize its performance and enhance the performance of the electric car engine Cold-resistant ability.
