Characteristics and application fields of commonly used positive and negative materials for lithium batteries
The commonly used anode materials for lithium-ion batteries include lithium manganese oxide, lithium cobalt oxide, lithium iron phosphate, and ternary materials. The commonly used anode materials include carbon materials and silicon-based materials. This issue brings an analysis of the characteristics of these materials and the fields of use.
The ion battery can be recharged during use. It belongs to a secondary rechargeable battery. The main working principle is the repeated movement of lithium ions between the positive and negative electrodes. Regardless of the shape of the battery, its main components are It is electrolyte, positive electrode sheet, negative electrode sheet and separator. At present, the international production of lithium-ion batteries is mainly concentrated in China, Japan and South Korea, and the main lithium-ion application markets are mobile phones, computers and automobiles.
With the continuous development of lithium-ion batteries, the application fields are gradually expanding. The use of cathode materials has changed from singularity to diversification, including: olivine-type lithium iron phosphate, layered cobalt acid Lithium, spinel-type lithium manganate, etc., realize the coexistence of multiple materials.
It can be seen from the technological development that more new cathode materials will be produced in the future development. For the cathode material of power batteries, it has stricter requirements in terms of cost, safety performance, cycle capacity, and energy density.
In the field of applied materials, due to the high cost and low safety of lithium cobalt oxide, it is usually suitable for ordinary consumer batteries in specific use, and it is difficult to meet the relevant requirements of power batteries. The other materials listed above have been fully utilized in current power batteries.
In the lithium ion battery materials, the negative electrode material is an important component, which can have a greater impact on the overall battery performance. At present, anode materials are mainly divided into two categories, one is carbon materials for commercial applications, such as natural graphite, soft carbon, etc., and the other is non-carbon anode materials that are under research and development, but the market prospects are promising. For example, silicon-based materials, alloy materials, tin-gold materials and so on.
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