Lithium batteries are divided into lithium batteries and lithium-ion batteries. Cell phones and laptops use lithium-ion batteries, which are often commonly referred to as lithium batteries. Batteries generally use materials containing lithium as electrodes, is a representative of modern high-performance batteries. True lithium batteries are seldom used in everyday electronics due to their high danger. Lithium-ion batteries were first developed by Sony in Japan in 1990. It is a lithium ion embedded in carbon (petroleum coke and graphite) to form an anode (traditional lithium batteries use lithium or lithium alloy as anode). LixCoO2, LixNiO2 and LixMnO4 are commonly used as cathode materials, and LiPF6+Ethylene Carbonate (EC)+Dimethyl Carbonate (DMC) is used as electrolyte. Petroleum coke and graphite as anode materials are non-toxic and sufficient resources, lithium ions embedded in carbon, overcoming the high activity of lithium, solving the safety problems existing in the traditional lithium batteries, anode LixCoO2 in charging and discharging performance and life expectancy can reach a higher level, so that the cost is reduced, in short, the overall performance of lithium-ion batteries has improved. It is expected that lithium-ion batteries will occupy a large market in the 21st century.