Do you know what is important about the type of lithium battery?

Lithium batteries are generally divided into two categories: Lithium metal batteries: Lithium metal batteries generally use manganese dioxide as the positive electrode material, lithium metal or its alloy metal as the negative electrode material, and use a non-aqueous electrolyte solution. Lithium batteries: Lithium batteries generally use lithium alloy metal oxide as the positive electrode material, graphite as the negative electrode material, and non-aqueous electrolyte. ①The high specific energy of lithium cobalt oxide battery makes lithium cobalt oxide battery a popular choice for mobile phones, notebook computers and digital cameras. The battery consists of a cobalt oxide cathode and a graphite carbon anode. The cathode has a layered structure. During discharge, lithium ions move from the anode to the cathode, while the direction of flow is opposite during the charging process. Lithium cobalt oxide batteries perform well in terms of high specific energy, but can only provide general performance in terms of power characteristics, safety and cycle life. ②Lithium manganese oxide battery Lithium manganese oxide is one of the more promising lithium ion cathode materials. Compared with traditional cathode materials such as lithium cobalt oxide, lithium manganese oxide has rich resources, low cost, no pollution, good safety, and good rate performance. It is an ideal cathode material for power lithium batteries, but its poor cycle performance and electrochemical stability greatly limit its industrialization. Lithium manganate mainly includes spinel-type lithium manganate and layered structure lithium manganate. Among them, spinel-type lithium manganate has a stable structure and is easy to realize industrialized processing. Nowadays, the products on the market have this structure. Advantages: cheap price; good low-temperature performance, discharge efficiency of more than 90% at minus 20 degrees; good safety performance. Disadvantages: poor performance at high temperature; low cycle life; low gram-specific capacity; poor rate discharge ③Lithium iron phosphate battery Lithium iron phosphate battery has the advantages of non-toxic, non-polluting, good safety performance, wide source of raw materials, low price, long life, etc. , Is an ideal cathode material for a new generation of lithium batteries. Lithium iron phosphate batteries also have their disadvantages. For example, the tap density of the lithium iron phosphate cathode material is relatively small. The volume of the lithium iron phosphate battery of equal capacity is larger than that of lithium cobalt oxide and other lithium batteries, so it does not have an advantage in miniature batteries. The nominal voltage of the iron phosphate battery is 3.2V, the final charging voltage is 3.6V, and the final discharge voltage is 2.0V. Due to the different quality and technology of the positive and negative materials and electrolyte materials used by various manufacturers, there will be some differences in their performance. ④Ternary polymer lithium battery Ternary polymer lithium battery refers to a lithium battery that uses lithium nickel cobalt manganese ternary cathode material as the cathode material. There are many kinds of cathode materials for lithium batteries, including lithium cobalt oxide, lithium manganate, and nickel. Lithium acid, ternary materials, lithium iron phosphate, etc. Ternary materials combine the advantages of lithium cobalt oxide, lithium nickel oxide and lithium manganate materials. They have excellent characteristics such as high capacity, low cost, and good safety. They gradually occupy a certain market share in small lithium batteries and are The power lithium battery field has good development prospects. The ternary lithium battery has high energy density and better cycle performance than normal lithium cobalt oxide. At present, with the continuous improvement of the formula and the perfect structure, the nominal voltage of the battery has reached 3.7V, and the capacity has reached or exceeded the level of lithium cobalt oxide batteries. ⑤Lithium nickel cobalt manganese oxide is one of the key materials of lithium batteries. Lithium cobalt oxide is currently the most widely used battery material, but cobalt resources are increasingly scarce and expensive, and lithium cobalt oxide batteries have potential safety hazards during use. Similar to lithium manganate, this system can be customized to be used as an energy battery or power battery. For example, the NMC in the 18650 battery under medium load conditions has a capacity of about 2,800mAh and can supply 4A to 5A discharge current; when the same type of NMC is optimized for specific power, the capacity is only 2,000mAh, but it can supply 20A Continuous discharge current. ⑥Lithium titanate battery Lithium titanate battery is a kind of lithium titanate used as the negative electrode material of lithium battery. It can be combined with lithium manganate, ternary material or lithium iron phosphate to form a 2.4V or 1.9V lithium ion secondary battery. In addition, it can also be used as a positive electrode to form a 1.5V lithium secondary battery with metallic lithium or lithium alloy negative electrode. Due to the high safety, high stability, long life and environmental protection characteristics of lithium titanate. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: What is the importance of the correct charging method for lithium battery packs?