2023-06-14 カリフォルニア大学校アーバイン校(UCI)
◆研究チームはニッケルを使った新しい化学反応を開発し、コバルトを必要とせずにリチウムイオンバッテリーの性能を向上させることに成功しました。
＜関連情報＞
- https://news.uci.edu/2023/06/14/uc-irvine-scientists-create-long-lasting-cobalt-free-lithium-ion-batteries/
- https://www.nature.com/articles/s41560-023-01267-y
低Ni、Coフリー正極化学で長寿命リチウムイオン電池を実現 Long-life lithium-ion batteries realized by low-Ni, Co-free cathode chemistry
Rui Zhang,Chunyang Wang,Peichao Zou,Ruoqian Lin,Lu Ma,Tianyi Li,In-hui Hwang,Wenqian Xu,Chengjun Sun,Steve Trask & Huolin L. Xin
Nature Energy Published:12 June 2023
DOI:https://doi.org/10.1038/s41560-023-01267-y
Abstract
The increasing demand for lithium-ion battery-powered electric vehicles (EVs) has led to a surge in recent prices of strategic battery materials such as cobalt (Co) and nickel (Ni). While all EV makers are eager to eliminate Co usage, Ni has rapidly become another ‘pain point’ for the industry, as its price is nearing half that of Co. The sustainability issue facing both Ni and Co puts forward a grand materials challenge, that is, to reduce Ni content and eliminate Co while maintaining high specific energy and stability. In this work, a complex concentrated doping strategy is used to eliminate Co in a commercial NMC-532 cathode. The LiNi0.5Mn0.43Ti0.02Mg0.02Nb0.01Mo0.02O2 cathode shows potential cost advantage with relatively high specific energy and significantly improved overall performance (~95% capacity retained after 1,000 cycles in pouch-type cells, 2.8–4.3 V vs graphite, at 1 C, 1.5 mA cm−2). Combining X-ray techniques and electron microscopy, we uncover the origins of the superior stability.
