Research on new perovskite lithium battery -Lithium - Ion Battery Equipment

Research on new perovskite lithium battery in Germany -Lithium - Ion Battery Equipment

Today's lithium batteries have many evidences to prove their shortcomings, which prompted people to consider using too many new materials in such devices. When it comes to anode, the goal is to integrate materials and better charge rate and energy density than commonly used graphite, and find a safe way to use lithium without risking dendrite.

Lithium titanate has proved its prospects and has certain commercial value, but the anode made of this material often has lower energy density than graphite and challenges related to cycle life and charging rate.

Lithium titanate battery is one of many ways to eliminate rare, expensive and environmentally harmful materials (especially cobalt and nickel) from the energy storage supply chain.

It is understood that up to now, such batteries are limited by the mismatched performance of anode and cathode, and try to overcome these problems by using 3D porous structure and embedding carbon nano-film into their equipment. These are integrated through a series of novel processes, including molecular coupling, freeze drying and pyrolysis.

Scientists led by the staff of Karlsruhe Institute of Technology (KIT) have achieved encouraging results using lithium lanthanum titanate anode (LLTO), which has perovskite crystal structure.

In the experiment, the working voltage of the anode is less than 1V, and the reversible capacity is 225 mA per gram, and the capacity remains 79% after 3000 cycles. Helmut Ehrenberg, director of KIT Applied Material-Energy Storage System Research Institute, said: Ultimately, battery voltage and energy storage capacity determine the energy density of the battery. In the future, LLTO anode can be a particularly safe and durable high-performance battery.(Lithium - Ion Battery Equipment)

The team pointed out that the performance of their anode was achieved without complex nanoscale engineering. Even for larger particles, LLTO anode shows better power density and charge rate than lithium titanate oxide, which is more widely studied.

The researchers attributed it to the pseudo-capacity property of LLTO, that is, the ion inserted and transferred its charge into the active material layer. Ehrenberg said: Because of the larger particles, LLTO can make electrode production simpler and cheaper in principle.

The group said that their work emphasized the importance of the chemical properties of lithium titanate batteries, and added that they hoped to promote the identification and development of other new titanium anode materials with satisfactory electrochemical properties.



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