American scientists create a battery that does not explode even if it gets hot

<p style=";text-align:left;direction:ltr">ArabiaWeather.com - Scientists in America have succeeded in creating <a href="http://jo.arabiaweather.com/content/%D8%A2%D8%A8%D9%84-%D8%AA%D8%AD%D8%B... battery</a> of a new type that stops working by itself when its temperature rises to a certain level, that is, it does not explode due to heat.</p><p style=";text-align:left;direction:ltr"></p><p style=";text-align:left;direction:ltr"> &quot;Many of us have tried various methods of fighting fires and explosions caused by lithium-ion batteries,&quot; says Chenan Bao of Stanford University, USA. &quot;Now we have managed to create a battery that can be completely disconnected for several times and then put back into operation without deteriorating its properties.&quot;</p><p style=";text-align:left;direction:ltr"></p><p style=";text-align:left;direction:ltr"> Bao adds: Lithium-ion batteries explode because when their temperature rises, an electrical contact occurs inside them, which increases their temperature, leading to the evaporation of the electrolyte solution and turning it into hot gas bubbles, and this causes the temperature to rise to 1000 degrees Celsius, and the battery explodes and causes a fire.</p><p style=";text-align:left;direction:ltr"></p><p style=";text-align:left;direction:ltr"> The scientific team headed by Bao has found a way to prevent these explosions from occurring, using the results of previous studies in the field of physics by university scientists. They created a &quot;thermometer&quot; from nanometer particles of nickel and placed it on a sheet of plastic and graphene.</p><p style=";text-align:left;direction:ltr"></p><p style=";text-align:left;direction:ltr"> This &quot;thermometer&quot; works in the following way: when it is in a calm state, the nickel particles come into contact with each other, allowing the conduction of electric current, but when the foil made of plastic and graphene heats up and expands, the contact of the nickel particles decreases, and thus their electrical conductivity decreases, meaning that these batteries When its temperature rises to a certain extent, it stops working, and after it cools down, it starts working again.</p><p style=";text-align:left;direction:ltr"></p>