Interface-engineered (AlMnCoNiZn)3O4@PPy nanocomposites for superior lithium storage: Mechanism and performance

Liang, Yunhe; Jin, Changqing; Tian, Dengyu; Peng, Zaidong; Yang, Zhong; Ding, Qingping

doi:10.1016/j.jpowsour.2025.239207

Interface-engineered (AlMnCoNiZn)₃O₄@PPy nanocomposites for superior lithium storage: Mechanism and performance

Journal Article · Fri Dec 26 00:00:00 EST 2025 · Journal of Power Sources

DOI:https://doi.org/10.1016/j.jpowsour.2025.239207· OSTI ID:3011061

Liang, Yunhe ^[1]; Jin, Changqing ^[1]; Tian, Dengyu ^[1]; Peng, Zaidong ^[1]; Yang, Zhong ^[1]; ^[2]

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

The practical application of graphite anodes in lithium-ion batteries (LIBs) is constrained by low specific capacity (372 mAh g^-1) and sluggish kinetics. Here, to address these limitations, our present study focuses on high-entropy oxides (HEOs), which offer high theoretical capacity and structural stability. We synthesized spinel-structured (AlMnCoNiZn)₃O₄ nanoparticles via a solution combustion method and fabricated an (AlMnCoNiZn)₃O₄@polypyrrole (PPy) nanocomposite through in-situ polymerization. Our electrochemical tests demonstrate that the PPy modification significantly enhances performance. While the pristine (AlMnCoNiZn)₃O₄ delivered 445 mAh g⁻¹ after 100 cycles at 100 mA g⁻¹ and 350 mAh g⁻¹ after 1000 cycles at 1000 mA g⁻¹, the (AlMnCoNiZn)₃O₄@PPy composite achieved 695 mAh g⁻¹ after 100 cycles and maintained 675 mAh g⁻¹ after 1000 cycles. Furthermore, the composite improved rate capacity at 1000 mA g⁻¹ from 211 mAh g⁻¹ to 403 mAh g⁻¹. This work highlights how conductive and flexible polymer modifications can dramatically improve the electrochemical properties of HEOs. The developed (AlMnCoNiZn)₃O₄@PPy composite provides a promising direction for designing advanced anodes to meet next-generation energy storage demands.

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:: 3011061

Journal Information:: Journal of Power Sources, Journal Name: Journal of Power Sources Vol. 666; ISSN 0378-7753

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Interface-engineered (AlMnCoNiZn)₃O₄@PPy nanocomposites for superior lithium storage: Mechanism and performance