Additive-Free Hollow-Structured Co3O4 Nanoparticle Li-Ion Battery: The Origins of Irreversible Capacity Loss
- Authors
- Kim, Youngjun; Lee, Jung-Hyun; Cho, Sungeun; Kwon, Yongwoo; In, Insik; Lee, Jihoon; You, Nam-Ho; Reichmanis, Elsa; Ko, Hyungduk; Lee, Kyu-Tae; Kwon, Hyun-Keun; Ko, Doo-Hyun; Yang, Heesun; Park, Byoungnam
- Issue Date
- 7월-2014
- Publisher
- AMER CHEMICAL SOC
- Keywords
- cobalt oxide; conversion reaction; capacity loss; Li-ion battery; nanoparticle
- Citation
- ACS NANO, v.8, no.7, pp.6701 - 6712
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS NANO
- Volume
- 8
- Number
- 7
- Start Page
- 6701
- End Page
- 6712
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/98013
- DOI
- 10.1021/nn500218m
- ISSN
- 1936-0851
- Abstract
- Origins of the irreversible capacity loss were addressed through probing changes in the electronic and structural properties of hollow-structured Co3O4 nanoparticles (NPs) during lithiation and delithiation using electrochemical Co3O4 transistor devices that function as a Co3O4 U-ion battery. Additive-free Co3O4 NPs were assembled into a U-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 Co3O4/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.
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