New US technology can clearly observe the movement of particles when 18650 rechargeable battery lithium 3.7v 3500mah are charged

Battery performance is crucial for electronic devices.

Short charging time and long duration are what everyone expects from the widely used lithium-ion 18650 rechargeable battery lithium 3.7v 3500mah.

Recently, researchers from the Lawrence Berkeley National Laboratory of the U.S. Department of Energy and Stanford University and other institutions have cooperated to develop a new X-ray microscope (STXM) technology that can carefully observe the particle activity during the charging and discharging process of lithium-ion 18650 rechargeable battery lithium 3.7v 3500mah, which may help develop more powerful lithium-ion 18650 rechargeable battery lithium 3.7v 3500mah.

The research team published a paper in the latest issue of Science magazine, saying that they used the advanced light source of the Berkeley Laboratory to specially design and manufacture a "liquid electrochemical ray microscope nano-imaging platform" that can image 30 particles at a time. The researchers said that compared with the transmission electron microscope (TEM) used in the past, the new platform has a larger field of view and stronger penetration, allowing users to observe some chemical-specific changes in real time.

The research team used this platform to observe and image the activity patterns of lithium iron phosphate particles during the charging and discharging process, and recorded in detail the evolution of the chemical composition of the particles and the chemical reaction rate. They found that the charging process on the surface of the particles was not uniform and would get worse over time.

In theory, when the battery is charged, it is ideal for the positively charged lithium ions to be evenly distributed on the electrode surface, but in reality this situation is difficult to achieve, especially after the battery ages. The researchers said that the new technology platform allows them to image the dynamic activities of the battery in real time at the mesoscopic scale, which is difficult but important to do.

With this technology, they have the ability to analyze the changes in particle chemical composition and current density in real time, study the charging and discharging process of the battery, and image the electrochemical reactions inside a single battery particle, which is helpful for better understanding the battery charging mechanism and optimizing battery performance. Currently, the research team is designing a more accurate X-ray microscope with a target resolution of 1 to 5 nanometers.

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