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The synergistic effect of Mg2+ and K+ in layered-oxide cathode materials for sodium-ion batteries by Xiaoyu Li; Jizhong Miao; Weibo Huang; Kehan Wang; Haowei Long; Yaowei Xu; Zi Wei; Yuxuan Wu; Mingjia Zhi; Zhanglian Hong is a Engineering article available to read on EtoBox.
What is The synergistic effect of Mg2+ and K+ in layered-oxide cathode materials for sodium-ion batteries about?
This work studies K x Fe 0.2 Mn 0.8-y Mg y O 2 (y = 0, 0.05, 0.10, 0.15, namely) layered oxides as the cathode of sodiumion battery and proposes an Mg 2+ -K + synergistic effect. The previous work have proved that both K + intercalation and Mg 2+ doping can increase the diffusion coefficient of Na + in layered-oxide cathode materials. On this basis, this paper further demonstrates that Mg 2+ doping significantly inhibits the transformation of the layered oxide to the amorphous phase, improves the stability of the layered structure, and further suppresses the loss of K + , thus improving the capacity, rate performance, and cycling stability of the material. Specifically, Mg 2+ can selectively anchor K + , thereby reducing the loss of K + during the charge-discharge process. The specific capacity of P3-K x Fe 0.2 Mn 0.7 Mg 0.1 O 2 has reached 158.8 mAh g -1 , and 69.6 mAh g -1 at 0.5 C and 5 C, and the capacity retention reaches 79.1% after 200 cycles at 3 C.
Who reads The synergistic effect of Mg2+ and K+ in layered-oxide cathode materials for sodium-ion batteries?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Xiaoyu Li; Jizhong Miao; Weibo Huang; Kehan Wang; Haowei Long; Yaowei Xu; Zi Wei; Yuxuan Wu; Mingjia Zhi; Zhanglian Hong
- Publisher
- Elsevier BV
- Published
- 2022
- Language
- EN
- Field
- Engineering (Physical Sciences)