Beyond the Cocktail Effect: Pseudocapacitive Kinetics and Cycling-Induced Activation in a Ten-Cation High-Entropy Oxide Anode
- 1Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, PA 18015, USA
- 2Department of Materials Science and Engineering, Hongik University, 72-1, Sangsu-dong, Mapo-gu, Seoul 04066, Republic of Korea
Abstract
Building on a previously established metal–organic framework (MOF)-inspired deca-nary high-entropy oxide anode/alternating current electrophoretic deposition (AC-EPD) platform, this study elucidates the multication distribution, charge-storage kinetics, and long-term cycling advantage of a binder- and conductive-agent-free deca-nary high-entropy anode. The active material was synthesized using a metal–organic framework 74 (MOF-74)-inspired deca-metal solvothermal coordination approach. Although the product evolved into a crystalline multi-metal oxide derivative rather than retaining the MOF-74 topology, energy-dispersive X-ray spectroscopy (EDS) confirmed the atomic-level homogeneous distribution of ten distinct cations (Mg, Ca, Sr, Ba, Mn, Fe, Co, Ni, Zn, Cd). The additive-free AC-EPD approach maximized the active material density and demonstrated the intrinsic electrochemical robustness of the high-entropy structure. Consequently, the electrode exhibited exceptional reversibility and superior rate capability (recovering ~310 mAh g−1 after 5.0 C cycling). Kinetic analysis revealed a dominant pseudocapacitive contribution (87% capacitive at 1.0 mV s−1), facilitating rapid lithium-ion transport. This work highlights a synergistic strategy combining MOF-inspired synthesis and electrophoretic fabrication for advanced high-entropy electrodes.
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BibTeX
@article{kim2026beyond,
title = {{Beyond the Cocktail Effect: Pseudocapacitive Kinetics and Cycling-Induced Activation in a Ten-Cation High-Entropy Oxide Anode}},
author = {Yuseong Kim and Byoung-Nam Park},
journal = {Nanomaterials},
year = {2026},
month = oct,
doi = {10.3390/nano16211344},
url = {https://www.mdpi.com/2079-4991/16/21/1344},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Beyond the Cocktail Effect: Pseudocapacitive Kinetics and Cycling-Induced Activation in a Ten-Cation High-Entropy Oxide Anode
AU - Yuseong Kim
AU - Byoung-Nam Park
PY - 2026
DA - 2026/10/23
JO - Nanomaterials
DO - 10.3390/nano16211344
UR - https://www.mdpi.com/2079-4991/16/21/1344
AB - Building on a previously established metal–organic framework (MOF)-inspired deca-nary high-entropy oxide anode/alternating current electrophoretic deposition (AC-EPD) platform, this study elucidates the multication distribution, charge-storage kinetics, and long-term cycling advantage of a binder- and conductive-agent-free deca-nary high-entropy anode. The active material was synthesized using a metal–organic framework 74 (MOF-74)-inspired deca-metal solvothermal coordination approach. Although the product evolved into a crystalline multi-metal oxide derivative rather than retaining the MOF-74 topology, energy-dispersive X-ray spectroscopy (EDS) confirmed the atomic-level homogeneous distribution of ten distinct cations (Mg, Ca, Sr, Ba, Mn, Fe, Co, Ni, Zn, Cd). The additive-free AC-EPD approach maximized the active material density and demonstrated the intrinsic electrochemical robustness of the high-entropy structure. Consequently, the electrode exhibited exceptional reversibility and superior rate capability (recovering ~310 mAh g−1 after 5.0 C cycling). Kinetic analysis revealed a dominant pseudocapacitive contribution (87% capacitive at 1.0 mV s−1), facilitating rapid lithium-ion transport. This work highlights a synergistic strategy combining MOF-inspired synthesis and electrophoretic fabrication for advanced high-entropy electrodes.
SN - 2079-4991
ER -