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Water Uptake of Tape-Cast Cathodes for Lithium Ion Batteries
U. Langklotz1, M. Schneider2, A. Michaelis1
1 TU Dresden, Institut für Werkstoffwissenschaft (Institute of Material Science), Helmholtzstr. 7, 01069 Dresden, Germany
2 Fraunhofer IKTS Dresden, Winterbergstr. 28, 01277 Dresden, Germany
received September 28, 2012, received in revised form November 30, 2012, accepted January 16, 2013
Vol. 4, No. 2, Pages 69-76 DOI: 10.4416/JCST2012-00036
Abstract
High-performance ceramic-based cathodes (e.g. NMC, LFP) are the backbone of lithium ion batteries. The production of cathodes is based on ceramic manufacturing technologies (powder processing, slurry, tape casting). The minimization of the water content in the fabricated battery is a crucial point in its manufacturing.
This work is focused on the kinetics of water uptake in tape-cast cathode materials (NMC, LFP). The cathode foils were exposed to atmospheres with varying humidity and the water content was determined by means of coulometric Karl-Fischer titration. Conversely, the tendency of the cathodes to release residual water is examined.
Additionally, electrochemical investigations were performed on cathode foils containing defined amounts of water. Galvanostatic charge-discharge experiments were conducted in 2-electrode Swagelok® cells versus graphite anodes. It could be shown that the influence of residual water on the cell performance is very complex. On the one hand, the residual water causes side reactions. On the other hand, low water content obviously supports the formation of the solid electrolyte interface (SEI) on the anode.
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Keywords
Lithium ion battery, residual water, LFP, NMC, solid electrolyte interface
References
1 Ohzuku, T., Brodd, R.J.: An overview of positive-electrode materials for advanced lithium-ion batteries, J. Power Sources, 174, 449 – 456, (2007).
2 Kaskhedikar, N.A., Maier, J.: Lithium storage in carbon nanostructures, Adv. Mater., 21, 2664 – 2680, (2009).
3 Daniel, C., Besenhard, J.O.: Handbook of battery materials. Second, completely revised and enlarged edition, vol.1. Wiley VCH, Weinheim, 2011, 482.
4 Heider, U., Oesten, R., Jungnitz, M.: Challenge in manufacturing electrolyte solutions for lithium and lithium ion batteries quality control and minimizing contamination level, J. Power Sources, 81 – 82, 119, (1999).
5 Barlow, C.G.: Reaction of water with hexafluorophosphates and with li Bis(perfluoroethylsulfonyl)imide salt, Electrochem. Solid St., 2, 362 – 364, (1999).
6 Abraham, D.P., Knuth, J.L., Dees, D.W., Bloom, I., Christophersen, J.P.: Performance degradation of high-power lithium-ion cells – electrochemistry of harvested electrodes, J. Power Sources, 170, 465 – 475, (2007).
7 Jang, D.H., Shin, Y.J., Oh, S.M.: Dissolution of spinel oxides and capacity losses in 4 V Li/LixMn2O4 cells, J. Electrochem. Soc., 143, 2204 – 2211, (1996).
8 Amatucci, G.G., Pasquier, A.D., Blyr, A., Zheng, T., Tarascon, J.-M.: The elevated temperature performance of the LiMn2O4/C system: failure and solutions, Electrochim. Acta, 45, 255 – 271, (1999).
9 Aurbach, D., Talyosef, Y., Markovsky, B., Markevich, E., Zinigrad, E., Asraf, L., Gnanaraj, J.S., Kim, H.-J.: Design of electrolyte solutions for li and Li-ion batteries: a review, Electrochim. Acta, 50, 2/3, 247 – 254, (2004).
10 Lee, H., Cho, J.-J., Kim, J., Kim, H.-J.: Comparison of voltammetric responses over the cathodic region in LiPF6 and LiBETI with and without HF, J. Electrochem. Soc., 152, 6, A1193 – A1198, (2005).
11 Joho, F., Rykart, B., Imhof, R., Novak, P., Spahr, M.E., Monnier, A.: Key factors for the cycling stability of graphite intercalation electrodes for lithium-ion batteries, J. Power Sources, 81 – 82, 243 – 247, (1999).
12 Verma, P., Maire, P., Novák, P.: A review of the features and analyses of the solid electrolyte interphase in Li-ion batteries, Electrochim. Acta, 55, 6332 – 6341, (2010).
13 Aurbach, D., Zaban, A., Schechter, A., Ein-Eli, Y., Zinigrad, E., Markowsky, B.: The study of electrolyte solutions based on ethylene and diethyl carbonates for rechargeable li batteries I. li metal anodes, J. Electrochem. Soc., 142, 2873 – 2882, (1995).
14 Mao, H., Reimers, J.N., Zhong, Q., von Sacken, U., In: Proceedings of the fall meeting of the electrochemical society, Abstract No. 100. Miami Beach, USA, 1994, 159.
15 Saharan, V., Roberts, J., Manev, V., Chia, Y.H., MacLean, G., McCullen, S.R.: Moisture uptake by the positive active material from the casting solvent and the ambient environment, J. Power Sources, 146, 809 – 812, (2005).
16 Brunauer, S., Emmett, P.H., Teller, E.: Adsorption of gases in multimolecular layers, J. Am. Chem. Soc., 60, 309 – 319, (1938).
17 Langmuir, I.: Adsorption of gases on glass, mica and platinum, J. Am. Chem. Soc., 40, [9], 1361 – 1403, (1918).
18 Freundlich, H.: Of the adsorption of gases. Section II. Kinetics and energetics of gas adsorption, Trans. Faraday Soc., 195 – 201, (1932).
19 Grigorio Jr., R., Capitao, R.C.: Morphology and phase transition of high melt temperature crystallized poly(vinylidene fluoride), J. Mat. Sci., 35, 299 – 306, (2000).
20 Salimi, A., Yousefi, A.A.: FTIR studies of β-phase crystal formation in stretched PVDF films, Polym. Test., 22, 699 – 704, (2003).
21 Broussely, M., Biensan, Ph., Bonhomme, F., Blanchard, Ph., Herreyre, S., Nechev, K., Staniewicz, R.J.: Main aging mechanisms in li ion batteries, J. Power Sources, 146, 90 – 96, (2005).
22 Amine, K., Liu, J., Belharouak, I.: High-temperature storage and cycling of C-LiFePO4/graphite Li-ion cells, Electrochem. Comm., 7, 669 – 673, (2005).
23 Wu, Y.P., Jiang, C., Wan, C., Holze, R.: Composite materials of silver and natural graphite as anode with low sensibility to humidity, J. Power Sources, 112, 255 – 260, (2002).
24 Fu, L.J., Zhang, H.P., Wu, Y.P., Wu, H.Q., Holze, R.: Surface active Sites: an important factor affecting the sensitivity of carbon anode materials towards humidity, Electrochem. Solid St., 8, [9], A456 – A458, (2005).
25 Lee, H.-H., Wang, Y.-Y., Wan, C.-C., Yang, M.-H., Wu, H.-C., Shieh, D.-T.: A fast formation process for lithium batteries, J. Power Sources, 134, 118 – 123, (2004).
26 Rasch, B., Cattaneo, E., Novak, P., Vielstich, W.: The influence of water on the oxidation of propylene carbonate on Platinum - an electrochemical, in situ FT-IT and On-Line MS Study, Electrochimica Acta, 36, [9], 1397 – 1402, (1991).
Copyright
Göller Verlag GmbH
Acknowledgments
This work is funded by the European Union (ERDF) and the Free State of Saxony within the scope of the ESF project 100087859 (ENano).
