China's energy storage network: a category four hurricane "Harvey" has swept across the southern coast of Texas, leading to a loss of 300, 000 homes.However, yao yan, a professor at the university of Houston's department of electronic engineering and Texas superconducting center, has developed a magnesium battery that offers hope for people to cope with the disaster.The team's new magnesium batteries make it possible to make cheap and safe energy storage.
Yao Yan on its latest published in the journal nature communications technology daily interview: "new type of energy storage technology can be used as a standby energy against hurricane, can also make the power grid is more stable."Current energy storage technologies include ultracapacitors, lead-acid batteries, lithium batteries, and so on. Different technologies have different power and duration.The selection of energy storage technology needs to take into account the geographical location, cost, safety, cycle life, energy density and other indicators.
Magnesium batteries have three distinct advantages compared to lithium-ion batteries: magnesium is abundant in the earth's crust, which is about 13.9%.The volume of the magnesium cathode is twice the volume of lithium metal;During the charging and discharging process, the magnesium metal cathode does not produce dendrite, so the safety is high.However, the solid phase diffusion of magnesium ions is very slow, and it is difficult to find the anode embedded materials suitable for magnesium ion storage."Looking for the positive electrode material for high ratio and working voltage is the key to developing magnesium batteries."Yao Yan said.
In order to solve this problem, they developed a new generation of the anode magnesium battery materials, makes the battery can be obtained as high as 400 mah/g the quality of the specific capacity, compared with the early magnesium battery anode, efficiency increased four times.At present, the voltage of the magnesium battery is about 1 volt, and the next generation of battery voltage being developed can be mentioned as close to 3 volts.
Although the study is still in its early stages and there is no specific timetable for industrialization, it presents a new research idea, which is of guiding value for cheap and safe multi-valent ion batteries.Mr. Yao hopes that the magnesium battery technology will provide solutions to energy storage technologies in future disasters.