Additive-free hollow-structured Co3O4 nanoparticle Li-ion battery: The origins of irreversible capacity loss

Youngjun Kim, Jung-hyun Lee, Sungeun Cho, Yongwoo Kwon, Insik In, Jihoon Lee, Nam Ho You, Elsa Reichmanis, Hyungduk Ko, Kyu Tae Lee, Hyun Keun Kwon, Doo Hyun Ko, Heesun Yang, Byoungnam Park

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Abstract

Origins of the irreversible capacity loss were addressed through probing changes in the electronic and structural properties of hollow-structured Co 3O4 nanoparticles (NPs) during lithiation and delithiation using electrochemical Co3O4 transistor devices that function as a Co3O4 Li-ion battery. Additive-free Co 3O4 NPs were assembled into a Li-ion battery, allowing us to isolate and explore the effects of the Co and Li2O formation/decomposition conversion reactions on the electrical and structural degradation within Co3O4 NP films. NP films ranging between a single monolayer and multilayered film hundreds of nanometers thick prepared with blade-coating and electrophoretic deposition methods, respectively, were embedded in the transistor devices for in situ conduction measurements as a function of battery cycles. During battery operation, the electronic and structural properties of Co3O4 NP films in the bulk, Co3O4/electrolyte, and Co3O 4/current collector interfaces were spatially mapped to address the origin of the initial irreversible capacity loss from the first lithiation process. Further, change in carrier injection/extraction between the current collector and the Co3O4 NPs was explored using a modified electrochemical transistor device with multiple voltage probes along the electrical channel.

Original languageEnglish
Pages (from-to)6701-6712
Number of pages12
JournalACS Nano
Volume8
Issue number7
DOIs
Publication statusPublished - 2014 Jul 22

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ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Kim, Y., Lee, J., Cho, S., Kwon, Y., In, I., Lee, J., You, N. H., Reichmanis, E., Ko, H., Lee, K. T., Kwon, H. K., Ko, D. H., Yang, H., & Park, B. (2014). Additive-free hollow-structured Co3O4 nanoparticle Li-ion battery: The origins of irreversible capacity loss. ACS Nano, 8(7), 6701-6712. https://doi.org/10.1021/nn500218m