Four-generation (4G) lithium ion battery and preparation method thereof

The invention discloses a four-generation (4G) lithium ion battery and a preparation method thereof. A new material and a new production process are adopted in the novel lithium ion battery, wherein an anode is made of a nickel-based lithium oxide; a cathode is made of silicon-carbon alloy; and a shell is made of a metal-polymer composite foil. Compared with a lithium ion battery made by the priorart, the four-generation lithium ion battery produced by the preparation method has the advantages that the capacity can be enhanced by 10% to 30%, tympanites and the liquid leakage rate is less than10 ppm without containing cobalt element, has higher capacity, better safety, environmental protection and lower cost and can be applied to the fields of digital code electrons and large-drive high-power electric sources.