Users of digital products find that battery capacity is always lost over time. Although the battery life just bought when the performance is not bad, but after two years of frequent charge and discharge, it is exactly the same two. The good news is that the U.S. Department of Energy scientists recently figured out one of the mechanisms that led to the "shrinkage" of the battery, and the future is expected to come up with a response strategy. In a common lithium-ion rechargeable battery, lithium ions can travel through the electrolyte between the anode and cathode, creating a current that powers the device. The so-called capacity, can be simply understood as the battery (charge and discharge) back and forth running lithium-ion volume.
When manganese ions are stripped from the cell's cathode, it reacts with the electrolyte near the cell's anode and captures lithium ions.
The DOE study found that the materials that make up the battery electrodes often crack and disintegrate so that some of the metal ions, specifically manganese, float freely and run to the opposite electrode, trapped in lithium ions.
As time goes on, more and more lithium-ion can not be put into normal operation (locked), the capacity of the battery is also gradually reduced, eventually resulting in unable to continue to provide the ideal life time.
Daniel Abraham, co-author of the study, explains: "This is strictly related to the management of manganese on the electrodes and the amount of lithium ions trapped, but we now know what's behind the scenes and will find a way in the future To overcome it. "