Introduction to the classification differences of positive materials for polymer lithium batteries.
(1) The current polymer lithium battery used for cobalt oxide lithium negative data has a strong positive data structure, large specific capacity, and excellent comprehensive function, but poor safety and high cost. Important for small and medium-sized batteries, with a nominal voltage of 3.7V.
(2) Lithium manganese oxide negative data is a low-cost and safe positive data, but the data itself is not strong and easily decomposes gas, confusing it with other data. In order to reduce the cost of the battery, however, the cycle life decays rapidly, easily expands, and the life is relatively short. The rated voltage of important large and medium-sized batteries is 3.8 V.
(3) The balanced ternary positive data of lithium nickel cobalt manganese can provide reliable information compared to individual lithium cobalt oxide cycling functions. In the early days, due to technical reasons, the rated voltage range was limited to 3.5-3.6 V. However, so far, in the development and improvement of structures and batteries with a rated voltage of 3.7 V, the capacity has reached or exceeded that of lithium cobalt oxide. The five major batteries, Sanyo, Panasonic.
G. Samsung has launched ternary data batteries, and laptop battery cables have partially replaced lithium cobalt oxide ternary data batteries. Sanyo and Samsung have completely ended the production of cobalt oxide polymer lithium ternary batteries. Currently, most domestic and foreign low-power batteries adopt ternary positive data.
(4) Currently, a new type of polymer lithium battery material, LiFePO4, has attracted widespread attention. Its protruding feature is good safety, no, excellent riding function of up to 2000 weeks, which is very suitable for electric vehicles, power tools and other fields. Its nominal voltage is only 3.2-3.3V, so its maintenance line is locally different from some polymer lithium batteries, but its problems are more obvious, and its energy density is much lower than that of lithium cobalt oxide and ternary materials.
