Analyses the characteristics of lithium ion battery cathode material

Source: 2020 - 04 - 10 then hits: lithium ion battery cathode material properties of lithium ion battery with other different compared with nimh batteries, lithium ion battery charging and discharging voltage is higher, about 3 times of nimh batteries, nickel-metal hydride batteries is 3. 7 v, nickel metal hydride batteries to 1. 2v。 Compared with metal lithium battery, can both have a higher volume and quality than that, but, in contrast, the stability of the lithium ion battery is better than metal lithium battery. In terms of performance and stability, before the lead-acid battery and nickel cadmium battery than the current widespread use of lithium ion battery, gradually replaced by lithium ion batteries and fuel cells. In addition, the volume of lithium ion battery is high specific energy and quality of nickel metal hydride batteries, lithium ion battery working principle is different from other cells, for example, in the lead-acid battery system, reactant is electrolyte, lithium ion battery, through positive cathode, electrolyte and cathode embedded material anode, electrolyte between the positive negative transfer, therefore, the lithium ion battery has a name, called 'swing' batteries. Lithium ion battery is how to work the working principle of lithium-ion battery is relatively simple, unloading, will break part of lithium ion in anode materials, in the electrolyte solution, and will have the same electrolyte of lithium ion embedded in the anode material, the external circuit, at the same time, the electrons flow from cathode to anode, provide energy for power supply, load. Lithium ion battery can also experience a reversible process, when the current or voltage applied to this process occurs when the positive or negative. The characteristics of lithium ion battery cathode material since the first lithium ion battery, the positive materials research has been performed. Low cost, high performance new anode material has been widely studied and discussed. ( 2) Reduce the pollution to the environment; Contact with the electrolyte stability; Must have strong conductive ability; ( 5) When lithium ion in the electrolyte transfer, embedded in the anode material and out, can react with lithium ion quickly; 6 must be able to with lithium ion in the reversible chemical reaction; Must be able to experience includes the REDOX reaction of transition metal elements. Meet the above requirements, should be considered when designing new anode materials embedded dynamic and thermodynamic properties of the battery system. The morphology and structure of the anode materials is also a factor to consider in the design of. Particle size effect on the electrochemical properties of anode materials materials the diameter of the particle size, density, shape and distribution of dynamic has a great influence, battery anode, the stability of the cell, it plays an important role in electrochemical property, for example, the spherical particles together to form a single spherical particle of spinel, this will strengthen the cycle performance of battery, particle size smaller chemical reaction is faster, because the material of the ions and electrons to reduce particle size and diffusion path shortened, but the size is too small also have corresponding faults, such as tap density leads to a lower energy density low, low thermal stability, the reaction of the electrolyte, it will be less reaction. In the constant research and analysis, various synthesis methods can create different sizes of material particles, the appropriate particle size and morphology can make the performance of lithium ion batteries is better. What is a '18650 lithium batteries' a lot of people are asking what is the 18650 lithium batteries? We put it down to explain: 18650 is actually a standard size, the first is cylindrical, 18, said the diameter of the cylinder is 18 mm, 65 indicates the height of the cylinder is 65 mm; 0 indicates cylinder; ( 3) Professional term is a lithium secondary battery, lithium-ion batteries can be recycled repeatedly charging and discharging. So 18650 18 times 65 cylindrical lithium-ion battery is a rechargeable lithium battery, it is short for batteries, similar to the 14500 lithium-ion batteries, AA battery and AAA battery.