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Peer-reviewedCC BY 4.0Batteries

Electrophoretic Deposition of Additive-Free Zeolitic Imidazolate Framework-67-Derived Cobalt Oxide Anodes for Lithium-Ion Batteries

  • Yujin Park1
  • Byoung-Nam Park2
  1. 1Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
  2. 2Department of Materials Science, Engineering Hongik University, 72-1, Sangsu-dong, Mapo-gu, Seoul 04066, Republic of Korea
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Abstract

Additive-free electrode architectures are important for clarifying the intrinsic lithium-storage behavior of MOF-derived conversion-type anode materials, because conventional slurry electrodes contain polymer binders and conductive carbon additives that can obscure the electrochemical response of the active material. Herein, zeolitic imidazolate framework-67 (ZIF-67) particles were directly deposited onto Cu foil by direct current electrophoretic deposition and subsequently oxidized in air to fabricate binder- and carbon-free Co3O4 thin-film anodes. X-ray diffraction, scanning electron microscopy, and transmission electron microscopy analyses confirmed that the crystalline ZIF-67 precursor was successfully converted into porous spinel Co3O4 while maintaining a film-type electrode architecture. The resulting electrode exhibited characteristic Co3O4 conversion reactions, including the initial reduction of Co3O4 to metallic Co/Li2O and the reversible oxidation of Co during charging. Despite the absence of conductive additives and binders, the electrode delivered stable charge–discharge behavior and retained approximately 250 mAh g−1 even at 10 C. Moreover, the capacity recovered when the current rate returned to 0.1 C, indicating good structural and electrochemical robustness. These results demonstrate that electrophoretic deposition is a simple and effective strategy for constructing additive-free MOF-derived oxide anodes for high-rate lithium-ion batteries.

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Cite

BibTeXRIS
BibTeX
@article{park2026electrophoretic,
  title = {{Electrophoretic Deposition of Additive-Free Zeolitic Imidazolate Framework-67-Derived Cobalt Oxide Anodes for Lithium-Ion Batteries}},
  author = {Yujin Park and Byoung-Nam Park},
  journal = {Batteries},
  year = {2026},
  month = oct,
  doi = {10.3390/batteries12100402},
  url = {https://www.mdpi.com/2313-0105/12/10/402},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Electrophoretic Deposition of Additive-Free Zeolitic Imidazolate Framework-67-Derived Cobalt Oxide Anodes for Lithium-Ion Batteries
AU  - Yujin Park
AU  - Byoung-Nam Park
PY  - 2026
DA  - 2026/10/07
JO  - Batteries
DO  - 10.3390/batteries12100402
UR  - https://www.mdpi.com/2313-0105/12/10/402
AB  - Additive-free electrode architectures are important for clarifying the intrinsic lithium-storage behavior of MOF-derived conversion-type anode materials, because conventional slurry electrodes contain polymer binders and conductive carbon additives that can obscure the electrochemical response of the active material. Herein, zeolitic imidazolate framework-67 (ZIF-67) particles were directly deposited onto Cu foil by direct current electrophoretic deposition and subsequently oxidized in air to fabricate binder- and carbon-free Co3O4 thin-film anodes. X-ray diffraction, scanning electron microscopy, and transmission electron microscopy analyses confirmed that the crystalline ZIF-67 precursor was successfully converted into porous spinel Co3O4 while maintaining a film-type electrode architecture. The resulting electrode exhibited characteristic Co3O4 conversion reactions, including the initial reduction of Co3O4 to metallic Co/Li2O and the reversible oxidation of Co during charging. Despite the absence of conductive additives and binders, the electrode delivered stable charge–discharge behavior and retained approximately 250 mAh g−1 even at 10 C. Moreover, the capacity recovered when the current rate returned to 0.1 C, indicating good structural and electrochemical robustness. These results demonstrate that electrophoretic deposition is a simple and effective strategy for constructing additive-free MOF-derived oxide anodes for high-rate lithium-ion batteries.
SN  - 2313-0105
ER  -