Unfortunately, lithium-ion batteries come with risks: they can overheat and cause explosions and fires. The problem of potentially dangerous accidents caused by overheating can be solved very soon.
Scientists from Stanford University have developed a safe battery that won't overheat. The new invention acquires its safety properties from a thin film of elastic polyethylene, which has been applied onto one of its electrodes. The film placed on its electrode will expand, causing the conductive spiky nickel particles within it to disperse from each other. After that the battery shuts down. Once it cools, the nickel particles are brought in contact with each other again, turning the battery back on. Hopefully, the Stanford’s technology will be adopted by the manufacturers in the nearest future.