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Mitigating Transition Metal Dissolution from Mn-rich Cathodes: Influence of Processing and Testing Methods
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DOI：10.1149/1945-7111/add4a5.png)
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Abstract
En 中文
Manganese-rich oxides continue to gain interest with respect to the development of Earth-abundant options for lithium-ion cathodes. Of the unique challenges that hinder the respective performance of various classes of such materials, manganese dissolution still stands as a common theme. The work herein explores Li3PO4 as a robust surface protection layer on a prototypical, Co-free, manganese-rich cathode in the way of a lithium- and manganese-rich oxide. The study highlights the critical importance of synthesis and processing in realizing optimal performance of a given surface treatment by comparing sol-gel and atomic layer deposition methods. Furthermore, cycling protocols are emphasized as a critical factor in adequately gauging the efficacy of surface protection strategies to mitigate manganese dissolution and the subsequent electrochemical consequence. Optimized Li3PO4 coatings coatings on lithium- and manganese-rich cathode particles are shown to greatly mitigate capacity fade, impedance rise, pore/void formation and mechanical damage during long-term cycling.
Keywords:
Li ion battery
Mn-rich cathodes
Atomic layer deposition
Mn dissolution
surface coating
Journal
IF:
3.3
Papers:
3.3W
Citations:
9.4W