The advancement of electric vehicle technology must pay close attention to the research and development of new battery technology

　　Looking at the current new energy vehicle market, there are many types, but the key core component is still the energy storage equipment of the vehicle. The energy storage capacity of the battery is the biggest bottleneck in current research: on the positive electrode, the energy storage capacity of sulfur is larger; on the negative electrode, the energy storage capacity of silicon and lithium metal is larger. This problem requires the choice of electrode materials. To solve it. Therefore, we must try to use these potential materials to build the next generation of energy storage systems for electric vehicles. In response, Professor Jin Zhong from the Key Laboratory of Mesoscopic Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Nanjing University, introduced the current research status and future development directions of new energy storage materials and devices for electric vehicles.

　　In this regard, Professor Jin Zhong further introduced six options for the next generation of energy storage devices.

　　The first option is silicon carbon anode material. It has the highest capacity, but the problem of volume expansion and flatulence during charging and discharging is serious, and our research institute is still in the critical stage.

　　The second option is super capacitors. Its charge and discharge speed is very fast, it can be fully charged in a few seconds, and has a long cycle life, good temperature resistance, high safety, maintenance-free, and low cost. It is a very promising new energy storage device.

　　The third option is lithium-sulfur batteries. Its positive electrode uses sulfur to store energy, and the negative electrode uses metal lithium to store it, so as to achieve a super-capacity storage state. Due to the extremely low price of sulfur and abundant reserves, this energy storage technology has great prospects. But at the same time, there are still problems such as charge and discharge speed, cycle life, safety, and temperature resistance that need to be resolved.

　　The fourth option is a newer generation of all-solid-state batteries, which have very high safety and capacity density, and have a long cycle life, but still need to solve the problem of slow charging and discharging speed.

　　The fifth option is a newer generation of concept technology: use some non-lithium active metals to replace scarce and expensive lithium, such as sodium batteries, magnesium batteries, and aluminum batteries. These battery technologies are still in the laboratory stage, but the prospects are very bright.

　　The last option is a metal lithium-air battery. The negative electrode of the battery uses lithium metal material, and then it is used with air as the positive electrode to increase the energy density. It is still in the laboratory research and development stage, far from reaching the level of commercial utilization.