The lithium battery used today has a longest life of about 10 years. Earlier, Japan's Sharp and Professor Tanaka from Kyoto University successfully developed a lithium-ion battery with a service life of up to 70 years. The long-life lithium-ion battery trial-produced this time has a volume of 8 cubic centimeters. By using the latest computer-based simulation technology, the combination of materials used in the positive electrode such as iron and silicon has been optimized.

　　The lithium battery used today has a longest life of about 10 years. Earlier, Japan's Sharp and Professor Tanaka from Kyoto University successfully developed a lithium-ion battery with a service life of up to 70 years. The long-life lithium-ion battery trial-produced this time has a volume of 8 cubic centimeters. By using the latest computer-based simulation technology, the combination of materials used in the positive electrode such as iron and silicon has been optimized.

　　Judging from the results of this experiment, the long-life lithium-ion battery can be charged and discharged up to 25,000 times. If calculated on the basis of one charge and discharge per day, the service life can be as long as 70 years. And Sharp said that after the actual charging and discharging 10,000 times, its performance is still stable. Calculated in this way, the service life of a lithium-ion battery like this will be 6 times the original. Even if it is used in combination with a power generation device that uses renewable energy, even if the solar panels and wind turbines are updated, the storage battery can still be used.

　　R&D personnel plan to apply this long-life lithium-ion battery to wind and solar power generation as a large-scale storage battery. At this stage, wind power and solar power generation are affected by the climate, and power output will change at any time. If it is matched with the battery, it can ensure stable output and reduce the impact on the power grid. Frequent replacement of batteries is an important factor driving up the cost of power generation. If this kind of lithium-ion battery with a service life of up to 70 years is applied to this, it will greatly reduce the cost of power generation.