Toyota Central R&D Labs, Inc. has successfully improved lithium-ion batteries’ performance by introducing non-metallic elements, focusing on lithium manganese oxide (LMO) as a cathode material. The introduction of nonmetallic elements such as boron and phosphorus has demonstrated the effects of long-cycling and high-capacity, respectively. These results were published in John Wiley & Sons' journal Advanced Energy Materials (online) on October 17, 2023. For the full text of the press release (in Japanese), please click the link below.
-
press release
（783KB）
【Summary】
We have demonstrated in test batteries that longer life and higher capacity can be achieved by controlling the crystal structure of LMO (disordered rock-salt type), which has fewer resource constraints, without using Co and Ni, which are resources of concern for sustainability, as positive electrode materials for lithium-ion secondary batteries.
- Long-life: The doping of nonmetallic elements B into interstitial sites stabilizes the crystal structure and maintains capacity even after repeated use.
- High-capacity: The doping of nonmetallic elements P into interstitial sites increases the amount of lithium-ions absorbed and released, resulting in a high energy density.
【Article Information】
Title：Activation and Stabilization of Mn-based Positive Electrode Materials by Doping Nonmetallic Elements
Authors：Mahara, Y., Oka, H., Nonaka, T., Kosaka, S.,- Takahashi, NT., Kondo, Y. Makimura, Y.
Journal Name：Advanced Energy Materials
Published：October 17, 2023
https://doi.org/10.1002/aenm.202301843