A Japanese company called Eamex claims it has found a way [JP] to increase the life of high-capacity lithium-ion batteries (that can be used in electric vehicles). Eamex says the new batteries can be charged and discharged over 10,000 times. Apparently, they can last about 20 years, too.
The main idea is to stabilize the electrodes and prevent the deterioration of tin, making the batteries withstand repeated charges. The batteries have a negative electrode that incorporates a tin-coated resin and accumulates lithium ions coming from the positive electrode. The positive electrode is made of silicon and tin and swells while generating the ions.
As a result, the repeated charging and discharging causes the binding between particles in the tin to weaken, but Eamex’s technology helps to effectively maintain the bonding among those particles.