November 1 news, a new study has been answered why the use of lithium iron phosphate battery cathode will usually make the battery performance than expected: the secret comes from its internal defects. Ming Tang, a material scientist in a news The manuscript said: 'We all know it works very well, but scientists have been arguing for the real reason that it is not so good in many ways, but it sometimes outweighs expectations.'
Researchers have found that some of the atoms in the lattice of lithium iron phosphate have a dislocation that is called the reverse position defect, and the scientists have found that this inversion defect may be able to solve this material This defect allows the cathode material to release and collect lithium ions from a larger surface area.
Prior to that, scientists assumed that lithium ions could only move in a single direction, limiting the size of the surface of the material that could release and absorb lithium ions. Microscopic imaging and computer models allowed scientists to observe during battery charging The movement of the ions shows that the presence of the reverse defect gives the ion a new direction of movement.
This defect effectively increases the surface active area of lithium iron phosphate nanorods and makes lithium ion transport between the positive electrode and the electrolyte more efficient Tang said: 'Most battery positives are shaped into thin discs to increase lithium Ion unidirectional motion Our findings have changed our perception of the optimal shape design of lithium iron phosphate The presence of such defects allows lithium ions to move in multiple directions which means that our design criteria for maximizing performance are completely non- precise. '
Even experts in battery research are not fully aware of the electrochemical performance and processes of lithium-ion batteries and their components, but as more scientists envision and analyze these electrochemical processes and properties, we will be able to Its perfect, so that the performance of lithium batteries as efficiently as possible.
