Explain the important advantages and disadvantages of lithium-ion batteries

Important advantages of lithium-ion batteries Now, we can see that the reason why lithium-ion batteries are in many fields is that it has the following advantages: 1. High voltage: The operating voltage of single lithium-ion batteries can reach up to 3.7v or even higher, while ordinary The working voltage of the nickel-cadmium battery and nickel-hydrogen battery is only 1.2v. 2. High specific energy: Compared with other batteries, lithium-ion batteries of the same mass or volume can supply higher energy. With the advancement of human technology, there are now some lithium-ion batteries that can release more than 500 watt-hours of energy per kilogram, which makes them more powerful than traditional batteries. 4. No memory effect: For other rechargeable batteries, if you want to charge during use, the remaining power must be discharged, which is very troublesome and also seriously affects the use of the battery. However, lithium-ion batteries can be charged at any time, showing its advantages. 5. Good cycle performance: For example, lithium iron phosphate can reach more than 2000 times, while other ordinary rechargeable batteries are generally 300-600 times. Therefore, if lithium-ion batteries are used, the battery life of electrical appliances with low current discharge will be greatly increased, and the competitiveness of electrical appliances will be doubled. 5. No memory effect: For other rechargeable batteries, if you want to charge during use, the remaining power must be discharged, which is very troublesome and also seriously affects the use of the battery. However, lithium-ion batteries can be charged at any time, showing its advantages. 6. Low self-discharge: Li-ion batteries can retain more power under the same storage conditions and the same power. 7. Wide operating temperature range: The operating temperature of lithium-ion batteries is generally between -30 and +60 ℃, and it has good working performance at high and low temperatures. With the improvement of electrolyte and positive electrode, it is expected to widen to -40~+70℃. 8. It is an environmentally friendly lithium-ion battery and generally does not contain harmful substances. Some shortcomings of lithium-ion batteries At present, people have developed a variety of lithium-ion batteries, there are many kinds of lithium-ion batteries, there are many types of lithium-ion batteries, we can classify them according to the positive electrode of the battery. Of course, due to the importance and diversity of electrolytes in lithium-ion batteries, they are also classified according to electrolytes. The first is a liquid lithium-ion battery, which is made of liquid electrolyte materials. The second is a polymer lithium ion battery, which is made of a material composed of polymer and solid electrolyte. According to the advantages of lithium-ion batteries listed in the previous article, it can be seen that it does have many obvious advantages, but some problems have also been found in research and application, the important ones are as follows: 1. Aging problem: lithium ion The battery also has the problem of capacity decay, but this decay is basically not related to the number of cycles, but mainly related to the storage temperature. If the storage temperature is too high, the lithium-ion battery will have more power attenuation. 2. Thermal safety issues: With the application of large-capacity lithium-ion batteries in more and more fields, lithium-ion batteries are prone to smoke and fire under high temperature, short circuit, overcharge, vibration, extrusion, impact and other working conditions It even exploded. The thermal safety of lithium-ion batteries has attracted people's attention, and the research on the thermal safety of lithium-ion batteries has become more and more in-depth. Of course, compared with the outstanding performance advantages, these problems will not affect the widespread use of lithium-ion batteries. People will also increase the research statement on lithium-ion battery problems and material performance improvements: Some pictures and content of articles published on this site From the Internet, if there is any infringement, please contact and delete