Tuning the electrochemical performance of high-entropy oxide nanopowder for anode Li-ion storage via structural tailoring

Hossein Minouei, Nikolai Tsvetkov, Mehdi Kheradmandfard, Jaeho Han, Dae Eun Kim, Sun Ig Hong

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The development of high-capacity stable electrodes is one of the major goals in the field of Li-ion batteries. High-entropy oxides (HEOs) are promising materials with high stability and Li storage capacity that can be used as anode materials in batteries. In this study, we investigated structural and electronic properties of nanocrystalline (Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)O, (Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)3O4, and (Mg0.2Cr0.2Mn0.2Fe0.2Co0.2)3O4 anode materials and the influence of their chemical composition and crystal structure on Li storage capability. The results show that the spinel phase is more preferable for anode applications compared to rock-salt due to the higher Li storage capacity. The presence of Ni in the HEO structure is favorable for enabling higher capacity; however, it also leads to material instability during charge-discharge cycling. To improve the stability, we replaced Ni with Mg, which resulted in superior stability and high capacity of HEO material during 1000 test cycles. Thus, this study demonstrated an approach for tailoring the chemical and structural properties of HEO electrodes for Li-ion battery applications to obtain high capacity and long-term stability.

Original languageEnglish
Article number232041
JournalJournal of Power Sources
Publication statusPublished - 2022 Nov 30

Bibliographical note

Funding Information:
This work was supported by Brain Pool Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT ( 2019H1D3A1A01102813 ) and ( 2020H1D3A2A02104083 ).

Publisher Copyright:
© 2022 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering


Dive into the research topics of 'Tuning the electrochemical performance of high-entropy oxide nanopowder for anode Li-ion storage via structural tailoring'. Together they form a unique fingerprint.

Cite this