-(2)New research confirms how lithium-rich cathode materials for high-energy electric vehicle batteries store charge at high temperatures

(2)New research confirms how lithium-rich cathode materials for high-energy electric vehicle batteries store charge at high temperatures
author:enerbyte source:本站 click317 Release date: 2023-10-27 09:43:52
abstract:
Electric vehicles will one day dominate the road and are crucial for eliminating carbon dioxide emissions. However, the main problem faced by car manufacturers is how to manufacture a cost-effective, durable, high energy density battery that can charge quickly and efficiently. Therefore, there...

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Electric vehicles will one day dominate the road and are crucial for eliminating carbon dioxide emissions. However, the main problem faced by car manufacturers is how to manufacture a cost-effective, durable, high energy density battery that can charge quickly and efficiently. Therefore, there is a competition to manufacture EV batteries with energy storage targets of 500Wh/Kg, but these goals cannot be achieved without the use of new positive electrode materials.

Despite continuous progress over the past 10 years to drive the performance of the most advanced nickel rich cathode used in electric vehicles, this material cannot provide the required energy density. To increase capacity, more lithium needs to be used, which means exceeding the ability of nickel to store electronic charges.

Lithium rich magnesium cathodes provide sufficient energy density, but to ultimately achieve the energy storage target of 500Wh/Kg, we need to understand how electronic charges are stored in the material. In short, it is the electronic charge stored on magnesium or oxygen sites.

In the paper "Is Manganese Oxidized in Manganese Rich Alkaline Excess Cathodes?" published today in the ACS Energy Express on February 17th, researchers from WMG at the University of Warwick overcame an important milestone in understanding lithium rich magnesium cathodes.

Lithium excess compounds involving conventional and unconventional oxidation-reduction refer to metal ions that change their electron density. The reversible change of electron density on oxygen (or oxygen redox) without the formation of oxygen is an unconventional redox process. The literature describes various computational models involving different mechanisms of two mechanisms, but ultimately requires careful X-ray studies during battery cycling (operands) to validate these models.

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