Study on how to solve the security risks of lithium battery

Lithium Batteries are "a near-ideal battery" by industry experts because lithium is the weakest metal on earth and has a greater ability to carry electrons than lead, zinc and nickel-cadmium, a much larger alternative , But it is undeniable that LiFePO4 Battery also have the potential safety hazard of overheating and fire. This is also an important reason that lithium-air batteries and lithium-sulfur batteries can not provide commercial promotion more than 10 times as much energy as storage.

However, today's Stanford University research team successfully found a way to make Lithium Iron Phosphate Battery more secure, is expected to further promote the Lithium Battery revolution.

The four major components of lithium batteries are cathode materials, anode materials, separators and electrolytes. Dendrites or hand-shaped lithium ions can easily cause short circuits or random explosions to form open flames when they grow inside. As soon as the dendrites form inside the cell, they rapidly intensify and may eventually pierce the positive and negative separators, as shown on the left of the picture above.

In order to avoid spontaneous combustion of the next generation of batteries, researchers try to find new ways to prevent fire hazards. They added two chemicals to the battery's internal electrolyte, one of which is lithium nitrate to improve battery life, and one that's lithium polysulfide, which breaks down the electrodes. During the test, it was possible to control the innocuous pancake-like product inside the battery rather than dendrites. In addition, the two chemical materials also improve the durability of the battery, after 300 cycles of the battery, the battery capacity remains above 99%.