Characteristics and properties of nano-LiCoO2 synthesized by pre-organized single source precursors: Li-ion diffusivity, electrochemistry and biological assessment.
- Brog JP Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700, Fribourg, Switzerland.
- Crochet A Fribourg Center for Nanomaterials FriMat, University of Fribourg, Chemin du Musée 9, 1700, Fribourg, Switzerland.
- Seydoux J Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700, Fribourg, Switzerland.
- Clift MJD Adolphe Merkle Institute, University of Fribourg, 1700, Fribourg, Switzerland.
- Baichette B Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700, Fribourg, Switzerland.
- Maharajan S Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700, Fribourg, Switzerland.
- Barosova H Adolphe Merkle Institute, University of Fribourg, 1700, Fribourg, Switzerland.
- Brodard P College of Engineering and Architecture of Fribourg, University of Applied Sciences of Western Switzerland, Boulevard de Pérolles 80, 1705, Fribourg, Switzerland.
- Spodaryk M Laboratory of Materials for Renewable Energy (LMER), ISIC-SB, École Polytechnique Fédérale de Lausanne (EPFL), Valais/Wallis Energypolis, Rue de l'Industrie 17, 1951, Sion, Switzerland.
- Züttel A Laboratory of Materials for Renewable Energy (LMER), ISIC-SB, École Polytechnique Fédérale de Lausanne (EPFL), Valais/Wallis Energypolis, Rue de l'Industrie 17, 1951, Sion, Switzerland.
- Rothen-Rutishauser B Adolphe Merkle Institute, University of Fribourg, 1700, Fribourg, Switzerland.
- Kwon NH Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700, Fribourg, Switzerland. namhee.kwon@unifr.ch.
- Fromm KM Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700, Fribourg, Switzerland. katharina.fromm@unifr.ch.
- 2017-08-24
Published in:
- Journal of nanobiotechnology. - 2017
Li+ Diffusion coefficient
Li-ion batteries
Nano-LiCoO2
Nanoparticle hazard
Single source precursors
A549 Cells
Cations, Monovalent
Chemokines
Cobalt
Cytokines
Dendritic Cells
Electric Power Supplies
Electrochemistry
Electrodes
Humans
Lithium
Macrophages
Nanoparticles
Oxides
Particle Size
English
BACKGROUND
LiCoO2 is one of the most used cathode materials in Li-ion batteries. Its conventional synthesis requires high temperature (>800 °C) and long heating time (>24 h) to obtain the micronscale rhombohedral layered high-temperature phase of LiCoO2 (HT-LCO). Nanoscale HT-LCO is of interest to improve the battery performance as the lithium (Li+) ion pathway is expected to be shorter in nanoparticles as compared to micron sized ones. Since batteries typically get recycled, the exposure to nanoparticles during this process needs to be evaluated.
RESULTS
Several new single source precursors containing lithium (Li+) and cobalt (Co2+) ions, based on alkoxides and aryloxides have been structurally characterized and were thermally transformed into nanoscale HT-LCO at 450 °C within few hours. The size of the nanoparticles depends on the precursor, determining the electrochemical performance. The Li-ion diffusion coefficients of our LiCoO2 nanoparticles improved at least by a factor of 10 compared to commercial one, while showing good reversibility upon charging and discharging. The hazard of occupational exposure to nanoparticles during battery recycling was investigated with an in vitro multicellular lung model.
CONCLUSIONS
Our heterobimetallic single source precursors allow to dramatically reduce the production temperature and time for HT-LCO. The obtained nanoparticles of LiCoO2 have faster kinetics for Li+ insertion/extraction compared to microparticles. Overall, nano-sized LiCoO2 particles indicate a lower cytotoxic and (pro-)inflammogenic potential in vitro compared to their micron-sized counterparts. However, nanoparticles aggregate in air and behave partially like microparticles.
LiCoO2 is one of the most used cathode materials in Li-ion batteries. Its conventional synthesis requires high temperature (>800 °C) and long heating time (>24 h) to obtain the micronscale rhombohedral layered high-temperature phase of LiCoO2 (HT-LCO). Nanoscale HT-LCO is of interest to improve the battery performance as the lithium (Li+) ion pathway is expected to be shorter in nanoparticles as compared to micron sized ones. Since batteries typically get recycled, the exposure to nanoparticles during this process needs to be evaluated.
RESULTS
Several new single source precursors containing lithium (Li+) and cobalt (Co2+) ions, based on alkoxides and aryloxides have been structurally characterized and were thermally transformed into nanoscale HT-LCO at 450 °C within few hours. The size of the nanoparticles depends on the precursor, determining the electrochemical performance. The Li-ion diffusion coefficients of our LiCoO2 nanoparticles improved at least by a factor of 10 compared to commercial one, while showing good reversibility upon charging and discharging. The hazard of occupational exposure to nanoparticles during battery recycling was investigated with an in vitro multicellular lung model.
CONCLUSIONS
Our heterobimetallic single source precursors allow to dramatically reduce the production temperature and time for HT-LCO. The obtained nanoparticles of LiCoO2 have faster kinetics for Li+ insertion/extraction compared to microparticles. Overall, nano-sized LiCoO2 particles indicate a lower cytotoxic and (pro-)inflammogenic potential in vitro compared to their micron-sized counterparts. However, nanoparticles aggregate in air and behave partially like microparticles.
- Language
-
- English
- Open access status
- gold
- Identifiers
-
- DOI 10.1186/s12951-017-0292-3
- PMID 28830490
- Persistent URL
- https://sonar.ch/global/documents/93769
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