Introduction to Positive Materials for Polymer Lithium Batteries.

Introduction to Positive Materials for Polymer Lithium Batteries.

1. Ternary data (NC M, NCA) is a nickname for lithium nickel cobalt manganese oxide (LiNixCoyMn1-x-y02) with similar structural characteristics to lithium cobalt oxide. Such data may be balanced and controlled in terms of energy density, cycle life, insurance function, and cost. The different configurations of nickel, cobalt, and manganese elements will bring different utilization functions to the data: an increase in nickel composition will increase the capacity of the data, but it will deteriorate the recycling function; The presence of cobalt can make the structural characteristics of data more robust, but excessive composition will result in a decrease in capacity; The presence of manganese may reduce costs and continuously improve insurance functions, but excessive composition can damage the layered structural characteristics of the data. 

2. Lithium iron phosphate (LFP) is one of the highly valued positive data at present, with a basic principle specific capacity of 170mAh/g and an actual specific capacity of over 150mAh/g. Its important features are low cost, excellent insurance function, and high cycle life. These characteristics have made lithium iron phosphate data a research and analysis hotspot in a short period of time, and lithium iron phosphate polymer batteries have a wide range of applications in the field of electric vehicles. The disadvantage of lithium iron phosphate is also quite obvious, that is, its energy density is low. There are two reasons for this: firstly, the voltage of lithium iron phosphate data is only about 3.3V, which is lower than other positive data, resulting in lower energy storage of lithium iron phosphate polymer batteries; The second reason is that lithium iron phosphate has weak conductivity and needs to be nanosized and coated to obtain good electrochemical utilization function, which makes the data increasingly loose and the compactness density lower. 

3. Lithium cobalt oxide (LCO) is a very good choice for small polymer lithium batteries. At present, in 3C electronic batteries, the vast majority still use lithium cobalt oxide instead of ternary materials with higher capacity. The reason is that the compactness density of lithium cobalt oxide materials exceeds that of ternary materials, which means that more lithium cobalt oxide can be accommodated per unit volume. In small-sized batteries that place greater emphasis on bulk density, lithium cobalt oxide occupies a crucial position.