The Anode Performance of the Mg0.2Co0.2Ni0.2Zn0.2Li0.1Cu0.1O High Entropy Oxide for Li-Ion Batteries

Abstract

High-entropy oxides (HEOs), which are new class of single-phase solid solution materials, have recently attracted as electrode material due to their Li-ion storage properties. In this work Mg0.2Co0.2Ni0.2Zn0.2Li0.1Cu0.1O high entropy oxide was synthesized by conventional solid state method to evaluate its electrochemical performances as anode in the Li-ion battery. The structure of the synthesized Mg0.2Co0.2Ni0.2Zn0.2Li0.1Cu0.1O was characterized by using X-ray diffraction and field emission - scanning electron microscope techniques. The synthesized high entropy oxide was observed to have single phase rock salt crystal structure. The electrochemical performance of the anode was evaluated by assembling CR2016 type coin cell. Galvanostatic charge/discharge tests showed that the Mg0.2Co0.2Ni0.2Zn0.2Li0.1Cu0.1O anode delivers a high initial discharge capacity of 1668 mA h g-1 at a current of 200 mAg-1. The capacity cyclic stability was observed as also satisfactory. These performance values show that the Mg0.2Co0.2Ni0.2Zn0.2Li0.1Cu0.1O high entropy oxide has good potential to be used as anode in Li-ion batteries.

Keywords

• Conversion type anode
• Li-ion battery
• High entropy oxide

References

1. Chen, H., Qiu, N., Wu, B., Yang, Z., Sun, S., & Wang, Y. (2020). A new spinel high-entropy oxide (Mg0.2Ti0.2Zn0.2Cu0.2Fe0.2)3O4 with fast reaction kinetics and excellent stability as an anode material for lithium ion batteries. RCS Advances, 10, 9736-9744.
2. Kim, T., Song, W., Son, D.-Y., Ono, L. K., & Qi, Y. (2019). Lithium-ion batteries: Outlook on present, future, and hybridized technologies. Journal of Materials Chemistry A, 7, 2942−2964.
3. Lökçü, E., Toparli, Ç., & Anik, M. (2020). Electrochemical performance of (MgCoNiZn)1-xLixO high-entropyoxides in lithium-ion batteries. ACS Applied Materials & Interfaces, 12, 23860-23866.
4. Lu, J., Chen, Z., Pan, F., Cui, Y., & Amine, K. (2018). High-performance anode materials for rechargeable lithium-ion batteries. Electrochemical Energy Reviews, 1, 35−53.
5. Puthusseri, D., Wahid, M., & Ogale, S. (2018). Conversion-type anode materials for alkali-ion batteries: State of the art and possible research directions. ACS Omega, 3, 4591−4601.
6. Sarkar, A., Velasco, L., Wang, D., Wang, Q., Talasila, G., de Biasi, L., Kübel, C., Brezesinski, T., Bhattacharya, S. S., Hahn, H., & Breitung, B. (2018). High entropy oxides for reversible energy storage. Nature Communications, 9(3400), 1-9.
7. Qiu, N., Chen, H., Yang, Z., Sun, S., Wang, Y., & Cui, Y. (2019). A high entropy oxide (Mg0.2Co0.2Ni0.2Cu0.2Zn0.2O) with superior lithium storage performance. Journal of Alloys and Compounds, 777, 767−774.
8. Wang, Q., Sarkar, A., Li, Z., Lu, Y,; Velasco, L,; Bhattacharya, S. S., Brezesinski, T., Hahn, H., & Breitung, B. (2019). High entropy oxides as anode material for Li-ion battery applications: A practical approach. Electrochemistry Communications, 100, 121−125.

9. Wang, D., Jiang, S., Duan, C.,Mao, J., Dong, Y., Dong, K., Wang, Z., Luo, S., Liu, Y., & Qi, X. (2020). Spinel-structured high entropy oxide (FeCoNiCrMn)3O4 as anode towards superior lithium storage performance. Journal of Alloys and Compounds, 844(4), 1-30. 156158.
10. Yu, S.-H., Feng, X., Zhang, N., Seok, J., & Abruña, H. D. (2018). Understanding conversion-type electrodes forlithium rechargeable batteries. Accounts of Chemical Research, 51, 273−281.
11. Yuan, C., Wu, H. B., Xie, Y.;, & Lou, X. W. D. (2014). Mixed transition- metal oxides: Design, synthesis, and energy-related applications. Angewandte Chemie International Edition, 53, 1488−1504.