Which is better, a new type of magnesium-ion battery or a lithium-ion battery?

Recently, researchers have taken another step forward in the research of electric vehicle batteries. Battery researchers made electric vehicle batteries with magnesium ions, which may be able to outperform lithium-ion battery electric vehicles. Since magnesium carries two positively charged ions, every time you use magnesium ions as a battery material, twice as many electrons can be touched. This work can open a reliable design path for high-voltage, high-energy batteries.

So which one has the advantage of new magnesium-ion battery or lithium-ion battery?

1. The lithium-ion battery used is expensive, has a short service life and has the risk of explosion. Magnesium-ion batteries are relatively safer, more environmentally friendly, and have higher energy density than lithium-ion batteries, and will be widely used in next-generation energy storage devices. However, when used as a cathode, the magnesium metal battery is the same as the lithium secondary battery, which cannot work at room temperature and can only be used at a high temperature of 60-100 degrees.

2. Since magnesium ion has two positive charges and lithium ion has only one, magnesium ion batteries have greater energy storage capacity than lithium ion batteries. Magnesium-ion batteries per unit mass can store more energy, which allows cars to run longer mileage and consumer electronics products can be used for longer periods of time.

3. One of the limiting factors of lithium-ion batteries is its anode. For safety reasons, low-capacity carbon rods must be used in lithium-ion batteries, because the anode of pure lithium material can cause dangerous short circuits or even fire. In contrast, magnesium is safer as an anode, so the combination of the cathode material and magnesium will make the battery smaller but with stronger storage capacity.

①Mg is safe and non-polluting, and its processing is more convenient than lithium. Mg compounds are non-toxic or low-toxic, have good recyclability, are biologically and environmentally friendly, and are green energy sources.

②The cycle life performance is good, (under the condition of -20~80℃), the capacity will only lose 15% after 2000 cycles.

③Mg reserves are abundant, and the price is low. The seawater and soil are rich in magnesium chloride and magnesium oxide, which is convenient for extraction and energy saving.

④ Compared with traditional lithium-ion batteries, batteries using Mg2+ embedded intercalation layers not only increase energy density, but also improve battery safety and reduce costs.

4. The new type of magnesium ion battery uses a brand new organic material as the negative electrode, expands graphite as the positive electrode, and uses the ionic liquid containing magnesium salt as the electrolyte. The anion intercalation reaction and the working mechanism of double ions greatly improve the magnesium ion battery The voltage and working performance.

5. The new magnesium ion battery has very good rate performance and cycle performance. The high rate charge and discharge capacity retention rate at 20C is 85%, and the capacity retention rate after 500 cycles at 5C rate is 95.7%. This not only greatly reduces the weight, volume and manufacturing cost of the battery, but also greatly improves the energy density and life of the battery, and provides a new idea for the selection of electrode materials for the entire magnesium ion battery.

Battery technology has always been the biggest obstacle restricting the improvement of smart technology products. Magnesium ion battery technology has always been considered to be the best element to extend battery life. With regard to lithium, the purchase cost is lower, the battery capacity is larger and the volume is larger. Small, if the capacity and heat resistance can be further improved, it will be expected to break through the battery life bottleneck.