Acid–base interaction between carbon black and polyurethane molecules with different amine values: Dispersion stability of carbon black suspension for use in lithium ion battery cathodes

Kil, Ki Chun; Kim, Gu Yeon; Cho, Chae Woong; Lim, Myung Duk; Kim, Ki Jun; Jeong, Kyeong-Min; Lee, Jinuk; Paik, Ungyu

doi:10.1016/j.electacta.2013.07.181

Cited by 22 publications

(11 citation statements)

References 31 publications

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“…Furthermore, economical aspects, e.g., improvement of process times, throughput and quality were considered, as well as formulation strategies and functional integration . Still, only few publications have addressed the CB particle size during and after the dispersion process and its impact on the electrode structure and properties to date …”

Section: Introductionmentioning

confidence: 99%

Influence of the Carbon Black Dispersing Process on the Microstructure and Performance of Li‐Ion Battery Cathodes

et al. 2019

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The influence of the dispersion process and the carbon black (CB) particle size on the resulting structure and, hence, on the properties of lithium‐ion battery cathodes is investigated. N‐methyl‐2‐pyrrolidone‐based cathode slurries with 95.5 wt% LiNi 0.6 Co 0.2 Mn 0.2 normalO 2 (NCM622) and a high mass content (82.5 wt%) are processed in a planetary mixer PMH10 from NETZSCH with varying high‐speed stirrer tip speeds. Particle size analyses are carried out to measure the CB particle size at different time steps of the dispersion process. The resulting cathodes are characterized to determine mechanical and electrical properties. The microstructure of chosen electrodes is reconstructed and quantified by focused ion beam/scanning electron microscopy tomography and correlated with experimental data. In addition, discrete element method simulations are used for a deeper understanding of the dispersion process and breakage of CB aggregates. Correlations between process, structure, and properties of lithium‐ion battery cathodes are revealed.

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Section: Introductionmentioning

confidence: 99%

Influence of the Carbon Black Dispersing Process on the Microstructure and Performance of Li‐Ion Battery Cathodes

et al. 2019

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“…Although there are a number of articles dealing with the addition of different carbonaceous materials to polyurethanes, few of them deal with the addition of carbon black to polyurethanes and they are focused mainly on the assembly of electronic devices. [14,[20][21][22][23] More recently, modified carbon black was added to waterborne polyurethane emulsions for increasing their mechanical properties [24] and the interactions between carbon black and model polyurethane compound were analysed by flow microcalorimetry and diffuse reflectance Fourier transform infrared spectroscopy obtaining reduced adsorption of the carbon black due to less accessible surface groups and the presence of relatively important amount of micropores. [25] The main advantages of the use carbon black as compared to other carbonaceous materials are its relatively low cost, low density and small particle size.…”

Section: Introductionmentioning

confidence: 99%

Effect of the carbon black content on the thermal, rheological and mechanical properties of thermoplastic polyurethanes

Álvarez-García

Martı́n-Martı́nez

2015

Journal of Adhesion Science and Technology

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Different mixtures of thermoplastic polyurethane (PU) with different amounts of nanometric carbon black (CB) were prepared by mechanical stirring in organic solvent, and their thermal, rheological, viscoelastic and mechanical properties were investigated. The rheology of the PU-CB mixtures in methyl ethyl ketone was optimized, allowing good dispersion of the CB in the polyurethane matrix once the solvent was removed; an increase in the number and size of carbon black aggregates in the polyurethane matrix was obtained by increasing the carbon black loading. Addition of carbon black improved the rheological and viscoelastic properties of the polyurethane, and the larger was the carbon black content, the higher was the storage modulus and the lower was the tanδ value. Moreover, the addition of higher amounts of CB changed the viscoelastic behaviour of the polyurethane, which became mainly elastic over all temperature range. On the other hand, the addition of CB loadings up to 12 wt% increased the thermal stability of the polyurethanes and increased the elongation-at-break without noticeable reduction in the tensile strength.

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“…Kil et al . reported the utilization of polyurethane-based dispersants to increase the dispersion of carbon black slurries 23 . Similarly, Zhi-an et al .…”

Section: Introductionmentioning

confidence: 99%

“…For instance, dispersants are widely employed to help dispersing the carbon and the active material in electrode films. Kil et al reported the utilization of polyurethane-based dispersants to increase the dispersion of carbon black slurries 23 . Similarly, Zhi-an et al proposed to disperse Super P carbon in polyacrylic acid dispersant with a high-shear mixer and to combine this suspension with a standard binder and LiFePO 4 (LFP) cathode material to make an electrode 24 .…”

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confidence: 99%

Facile formulation and fabrication of the cathode using a self-lithiated carbon for all-solid-state batteries

Delaporte

Darwiche

Léonard

et al. 2020

Sci Rep

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We propose a innovative concept to boost the electrochemical performance of cathode composite electrodes using surface-modified carbons with hydrophilic moieties to increase their dispersion in a Lithium nickel Manganese cobalt oxide (nMc) cathode and in-situ generate Li-rich carbon surfaces. Using a rapid aqueous process, the hydrophilic carbon is effectively dispersed in NMC particles followed by the conversion of its acid surface groups (e.g.-COOH), which interact with the NMC particles due to their basicity, into grafted Li salt (-COO − Li +). the solid-state batteries prepared using the cathode composites with surface-modified carbon exhibit better electrochemical performance. Such modified carbons led to a better electronic conduction path as well as facilitating Li + ions transfer at the carbon/NMC interface due to the presence of lithiated carboxylate groups on their surface.

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Acid–base interaction between carbon black and polyurethane molecules with different amine values: Dispersion stability of carbon black suspension for use in lithium ion battery cathodes

Cited by 22 publications

References 31 publications

Influence of the Carbon Black Dispersing Process on the Microstructure and Performance of Li‐Ion Battery Cathodes

Influence of the Carbon Black Dispersing Process on the Microstructure and Performance of Li‐Ion Battery Cathodes

Effect of the carbon black content on the thermal, rheological and mechanical properties of thermoplastic polyurethanes

Facile formulation and fabrication of the cathode using a self-lithiated carbon for all-solid-state batteries

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