Metal oxide cathodes
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Zheng, Yu, and Perla B. Balbuena. “Exploring the Mechanisms of LiNiO2 Cathode Degradation by the Electrolyte Interfacial Deprotonation Reaction.” ACS Applied Materials & Interfaces(2024).
Nickel-rich layered oxides stand as ideal cathode candidates for high specific capacity and energy density next-generation lithium-ion batteries. However, increasing the Ni content significantly exacerbates structural degradation under high operating voltage, which greatly restricts large-scale commercialization. While strategies are being developed to improve cathode material stability. … View more
Biwei Xiao, Yu Zheng, Miao Song, Xiang Liu, Gi-Hyeok Lee, Fred Omenya, Xin Yang, Mark H. Engelhard, David Reed, Wanli Yang, Khalil Amine, Gui-Liang Xu, Perla B. Balbuena, and Xiaolin Li, “Protonation Stimulates the Layered to Rock Salt Phase Transition of Ni-Rich Sodium Cathodes,” Adv. Mater., 2308380, (2023).
Protonation of oxide cathodes triggers surface transition metal dissolution and accelerates the performance degradation of Li-ion batteries. While strategies are developed to improve cathode material surface stability, little is known about the effects of protonation on bulk phase transitions in these cathode materials or their sodium-ion battery counterparts. Here, using NaNiO2 in electrolytes with different proton-generating levels as model systems… View more