Journal
ELECTROCHIMICA ACTA
Volume 429, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2022.140970
Keywords
Li4Ti5O12; Aqueous processing; Phosphoric acid; Anode; Lithium-ion battery
Categories
Funding
- German Federal Ministry of Education and Research (BMBF) [03XP0257D]
- Helmholtz Association
- Chinese Scholarship Council (CSC)
- Ministry of Science and Technology, Taiwan
Ask authors/readers for more resources
This study comprehensively investigates the addition of phosphoric acid to aqueous electrode slurries and finds that it can effectively suppress corrosion issues and improve the electrochemical performance.
The aqueous processing of lithium-containing electrode materials is challenged by the reactivity of such materials towards water, resulting in lithium leaching, slurry pH increase, and consequent corrosion of the aluminum current collector. The addition of (mild) acids to the aqueous electrode slurry has been reported as a viable method to suppress the corrosion issue. Herein, we present a comprehensive investigation of the addition of phosphoric acid (PA) to an aqueous electrode slurry containing Li4Ti5O12 as the active material. Following an initial evaluation of the slurry pH evolution as a function of the PA content, a comparative investigation of the PA-free electrodes and the corrosion-free electrodes was performed. The latter clearly outperform the PA-free electrodes in terms of their electrochemical performance. Interestingly, this is not only resulting from the buffered pH, but the phosphate anion also plays a decisive role.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available