Published in ACS Applied Energy Materials

The study on “5 V positive electrode materials for lithium-ion batteries” by Yoshinari Makimura et.al. in collaboration with Toyota Motor Corporation, was published in ACS Applied Energy Materials.

Lithium-ion batteries are attracting attention as a key to the energy-storage technology toward achieving the target of carbon neutrality. The basic performance of these batteries is determined by electrode materials, particularly positive electrode materials. Nickel-based layered materials showing 3.7 V of operating voltage are widely used as positive electrode materials, but we focused on 5 V positive electrode materials, which have the highest electrode potential among the materials reported so far, to design the batteries having high power as well as high energy-density. Results showed that a correlation exists between the reaction mechanism and the increased polarizations, i.e., resistance, of 5 V positive electrode materials having a spinel-framework structure. Furthermore, we achieved remarkable decrease in resistance by changing the reaction mechanism through material synthesis and modifications. These results are expected to further improve the performance of lithium-ion batteries.

Title: Improved Kinetics in Spinel-related 5 V Positive Electrode Materials by Changing Lithium Insertion Schemes for Lithium-ion Batteries
Authors: Makimura, Y., Niitani, K., Goto, I., Tsujiko, A., Oka, H., Nonaka, T., Abe, T.
Journal Name: ACS Applied Energy Materials
Published: September 25, 2022
https://doi.org/10.1021/acsaem.2c01721