Preparation and electrochemical properties of high-entropy oxide Lix(CrMnCoNiZn)3-xO4

Liang, Yunhe; Feng, Ruohai; Jin, Changqing; Yang, Zhong; Ding, Qingping

doi:10.1016/j.mtcomm.2025.113111

Preparation and electrochemical properties of high-entropy oxide Li_x(CrMnCoNiZn)_3-xO₄

Journal Article · Sun Jun 15 00:00:00 EDT 2025 · Materials Today Communications

DOI:https://doi.org/10.1016/j.mtcomm.2025.113111· OSTI ID:2571580

Liang, Yunhe ^[1]; Feng, Ruohai ^[1]; Jin, Changqing ^[1]; Yang, Zhong ^[1]; Ding, Qingping ^[2]

Xi’an Technological Univ. (China)
Ames Laboratory, and Iowa State Univ., Ames, IA (United States)

High-entropy oxides (HEOs) have gained significant attention as anode materials for lithium-ion batteries (LIBs) due to their high theoretical specific capacity, synergistic effects of constituent elements, and enhanced structural stability induced by high entropy. Here, this study investigates the electrochemical properties of a novel series of HEOs, Li_x(CrMnCoNiZn)_3-xO₄, synthesized via the sol-gel method. As lithium content increases, the electrochemical lithium storage performance of the HEOs improves, attributed to the rise in high-valence states and oxygen vacancies. The high valence state of elements facilitates greater electron transfer, enhancing the specific capacity during lithium insertion. Additionally, a higher concentration of oxygen vacancies boosts ionic conductivity and lithium ion diffusion kinetics, leading to superior electrochemical performance. Among the synthesized materials, Li_0.11(CrMnCoNiZn)_2.89O₄ exhibited the best performance, delivering a discharge capacity of 365 mAh·g⁻¹ after 100 cycles at 100 mA·g⁻¹, 257 mAh·g⁻¹ after 1000 cycles at 1 A·g⁻¹, and a rate capacity of 196 mAh·g⁻¹ at 2 A·g⁻¹. The Li⁺ diffusion coefficient reached 2.78 × 10⁻¹⁵ cm²·s⁻¹. This work not only deepens the understanding of HEOs' electrochemical behavior in LIBs but also provides insights into the impact of lithium ion substitution on their performance.

View Accepted Manuscript (DOE)

Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 2571580

Journal Information:: Materials Today Communications, Journal Name: Materials Today Communications Vol. 47; ISSN 2352-4928

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Preparation and electrochemical properties of high-entropy oxide Li_x(CrMnCoNiZn)_3-xO₄