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There are still many problems with the battery power supply of electric vehicles, such as the charging time is too long and the driving distance is short. In addition, the battery is large and bulky, and the driver cannot speed up quickly, which is also unsatisfactory.

Researchers from the Burns School of Engineering at the University of California, Riverside, USA have redesigned the composition materials of the battery, which can not only protect the environment, but also solve the above problems. They believe that designing nanoparticles with adjustable shape can develop energy-saving batteries with smaller size and more powerful functions. In addition, the researchers also modified the size and shape of the battery module to reduce the charging time. "This is the most basic and critical step to improve battery efficiency," said David Kaserus, the chief researcher of the project. In addition to electric vehicles, the modified battery can also be used to store municipal energy, including solar energy and wind energy.

A new article published in the journal Crystal Growth and Design summarizes the initial research findings. The article is entitled "solvothermal synthesis, development and performance of lithium iron phosphate nanostructures".

Researchers at the Bionics and Nanomaterials Laboratory in Katharus began to focus on the cathode, a material component of the battery, to improve the efficiency of the lithium-ion battery.

Lithium iron phosphate is a kind of cathode, which is used in electric vehicles because of its low cost, low toxicity, thermal stability and chemical stability. However, due to its poor conductivity and lithium ion mobility, its commercial potential is very limited. Some synthesis methods overcome these shortcomings by controlling the growth of particles. However, Katharus and his team used solvothermal synthesis to put the reactants into a vessel similar to a pressure cooker and heat them under high pressure.

Katharus and his team use mixed solvents to control the size, shape and crystallinity of particles, and then closely monitor how to form lithium iron phosphate. In this way, they can determine the relationship between the nanostructures formed and their performance in the battery.

Generally, the shape of lithium iron phosphate controls the thickness of nanocrystals in particles, which is equivalent to 1/5000 of a human hair. Through the control of nanocrystals, the Katharus team found that batteries that needed more power might come out.

The size and shape of these particles can be adjusted to provide more insertion points and shorter path length for lithium ion transmission, thus improving the efficiency of the battery. Katharus and his team are working to improve the process, which can not only improve performance and reduce costs, but also be widely adopted.

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