The purpose of developing high technology is to make it serve mankind better. Since the introduction of lithium-ion batteries in 1990, their excellent performance has been rapid development, and widely used in society. Lithium-ion batteries have rapidly occupied many fields with the incomparable advantages of other batteries, such as the well-known cell phones, laptop computers, small video cameras and so on, and more and more countries are applying the battery to military use. Application shows that the lithium-ion battery is an ideal small green power. The main components of lithium-ion batteries (1) battery cover (2) positive ---- active substance for lithium cobalt oxide (3) diaphragm ---- a special composite film (4) negative ---- active substance for carbon (5) organic electrolyte (6) battery shell The superior performance of lithium-ion batteries We often say that lithium-ion batteries are superior to the traditional nickel-cadmium batteries (Ni/Cd) and nickel-metal hydride batteries (Ni/MH). Ni/MH). Then, lithium-ion batteries are actually good at what? (1) High operating voltage (2) High specific energy (3) Long cycle life (4) Low self-discharge rate (5) No memory effect (6) Non-pollution