What is the true life span of a mobile phone battery?

Nowadays, mobile phones use lithium batteries, which can be used for 300 to 500 cycles. Under normal use, it can generally be used for 3 to 5 years. Therefore, friends who do not require a mobile phone generally use the battery until the battery can no longer be used, so their mobile phone life can reach more than 3 years. At present, technology is developing very fast, and mobile phone manufacturers are updating new models very quickly. Many people can't help but buy new models of their favorite mobile phone brands. This led to the mobile phone that had not been used for a long time and was left unused. Well, the life span of such a friend’s mobile phone is often less than one year. The figure shows that lithium aluminum titanium phosphate (LATP) particles that are in contact with lithium metal will be immediately reduced, and serious side reactions between lithium and solid electrolyte will cause the battery to fail within a few cycles. Shown on the right is an artificial boron nitride film that is chemically and mechanically resistant to lithium. It isolates LATP from lithium electronically, but when it is permeated by polyethylene oxide (PEO), it can still supply a stable ion channel, thereby achieving a stable circulation. In addition, the preparation of boron nitride by chemical vapor deposition is easy to form large-scale (~dm level), atomically thin-scale (~nm level) and continuous thin films. Although the early research used a polymer protective layer with a thickness of only 200 microns, the newly researched BN protective film with a thickness of only 5 to 10 nanometers is still very thin under the limit of this protective layer, without reducing the energy density of the battery. This is a perfect material that can act as a barrier to guard against the intrusion of metallic lithium into the solid electrolyte. Just like bulletproof vests, a lithium metal bulletproof vest for unstable solid electrolytes has been developed. Through this innovation, a lithium metal battery with a long cycle life is realized. Researchers are currently expanding the new method to a wide range of unstable solid electrolytes and further optimizing the interface, hoping to create high-performance, long-cycle-life solid-state batteries. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the characteristics of lithium battery anode materials?