August , 2022
The full name of vanadium battery is all-vanadium redox flow battery. In order to ensure the safety of energy storage power stations, the National Energy Administration issued relevant documents in June 2022. It is planned to stipulate that medium and large electrochemical energy storage power stations shall not use ternary lithium batteries, sodium Sulfur batteries, soliciting opinions from the society, let vanadium batteries usher in the spring.
LiFePO4 battery has a series of unique advantages such as high working voltage, high energy density, long cycle life, low self-discharge rate, no memory effect, green environmental protection, etc., and supports stepless expansion, suitable for large-scale electric energy storage, in renewable Energy power stations have good application prospects in the fields of safe grid connection of power generation, power grid peak regulation, distributed power stations, UPS power supplies, and emergency power supply systems.
Ternary lithium batteries generally refer to ternary polymer lithium batteries. Ternary polymer lithium battery refers to a lithium battery whose positive electrode material uses nickel cobalt lithium manganate (Li(NiCoMn)O2) ternary positive electrode material. The precursor product of ternary composite positive electrode material is nickel salt, cobalt salt, manganese salt. As the raw material, the ratio of nickel, cobalt and manganese in it can be adjusted according to actual needs. The battery with ternary material as the positive electrode is safer than the lithium cobalt oxide battery, but the voltage is too low, so it is used in mobile phones (the cut-off voltage of mobile phones is generally around 3.4V). ) will have a clear feeling of insufficient capacity.
Research published in the latest issue of the American Chemical Society "NanoLetters" shows that Chinese scientists are expected to develop a lithium battery that is resistant to combustion and explosions. This lithium battery made of new materials is flexible, low-cost and safer.
Lithium manganese iron phosphate (LMFP) is a new type of cathode material obtained by adding manganese element on the basis of LiFePO4. On the one hand, it can improve the voltage of the material system and make up for the lack of low energy density caused by low voltage of LiFePO4; The surface is coated with a carbon material conductive agent to improve the conductivity. So, what are the advantages of LMFP cathode material?
Ternary lithium-ion batteries refer to lithium-ion batteries that use three transition metal oxides of nickel, cobalt, and manganese as cathode materials. Compared with lithium iron phosphate batteries, ternary lithium-ion batteries have more average overall performance and higher energy density. high, the volume specific energy is also higher. Because it combines the advantages of lithium cobaltate, lithium nickelate and lithium manganate, its performance is better than any of the above single-component cathode materials.