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A hermetic dense polymer-carbon composite-based current collector foil (PCCF) for lithium-ion battery applications was developed and evaluated in comparison to state-of-the-art aluminum (Al) foil collector. Water-processed LiNi0.5Mn1.5O4 (LMNO) cathode and Li4Ti5O12 (LTO) anode coatings with the integration of a thin carbon primer at the interface to the collector were prepared. Despite the fact that the laboratory manufactured PCCF shows a much higher film thickness of 55 µm compared to Al foil of 19 µm, the electrode resistance was measured to be by a factor of 5 lower compared to the Al collector, which was attributed to the low contact resistance between PCCF, carbon primer and electrode microstructure. The PCCF-C-primer collector shows a sufficient voltage stability up to 5 V vs. Li/Li+ and a negligible Li-intercalation loss into the carbon primer. Electrochemical cell tests demonstrate the applicability of the developed PCCF for LMNO and LTO electrodes, with no disadvantage compared to state-of-the-art Al collector. Due to a 50% lower material density, the lightweight and hermetic dense PCCF polymer collector offers the possibility to significantly decrease the mass loading of the collector in battery cells, which can be of special interest for bipolar battery architectures.
Marco Fritsch; Matthias Coeler; Karina Kunz; Beate Krause; Peter Marcinkowski; Petra Pötschke; Mareike Wolter; Alexander Michaelis. Lightweight Polymer-Carbon Composite Current Collector for Lithium-Ion Batteries. Batteries 2020, 6, 60 .
AMA StyleMarco Fritsch, Matthias Coeler, Karina Kunz, Beate Krause, Peter Marcinkowski, Petra Pötschke, Mareike Wolter, Alexander Michaelis. Lightweight Polymer-Carbon Composite Current Collector for Lithium-Ion Batteries. Batteries. 2020; 6 (4):60.
Chicago/Turabian StyleMarco Fritsch; Matthias Coeler; Karina Kunz; Beate Krause; Peter Marcinkowski; Petra Pötschke; Mareike Wolter; Alexander Michaelis. 2020. "Lightweight Polymer-Carbon Composite Current Collector for Lithium-Ion Batteries." Batteries 6, no. 4: 60.
The hot gas corrosion behavior of two melt grown composite materials (Al2O3/YAG and Al2O3/GAP) in comparison with alumina and sapphire was investigated. The tests were performed in a high temperature burner rig at 1450 °C, a total pressure of 1 atm with a water vapor partial pressure of 0.28 atm, a gas flow velocity of 100 m/s and exposure times for up to 450 h. In comparison to sapphire, alumina showed comparable corrosion rates and similar corrosion traces on the corroded surface. The Al2O3/YAG and Al2O3/GAP melt grown composite materials were subject to degradation due to the corrosion attack of the alumina phase. This was the consequence of the formation and evaporation of volatile hydroxides (e.g., Al(OH)3). In comparison to polycrystalline alumina the YAG or GAP showed a higher corrosion stability, which causes the formation of a porous YAG or GAP surface layer with increasing corrosion time. For short corrosion times, the porous YAG or GAP surface layer led to a small corrosion protection of the material. After longer corrosion times a switch to linear corrosion kinetics was observed due to spalling of the porous corrosion layer. The corrosion rates for long exposure times were comparable to bulk alumina or sapphire. In principle the regarded polycrystalline and single crystalline materials showed the same corrosion behavior.
Marco Fritsch; Hagen Klemm. The water vapor hot gas corrosion of MGC materials with Al2O3 as a phase constituent in a combustion atmosphere. Journal of the European Ceramic Society 2008, 28, 2353 -2358.
AMA StyleMarco Fritsch, Hagen Klemm. The water vapor hot gas corrosion of MGC materials with Al2O3 as a phase constituent in a combustion atmosphere. Journal of the European Ceramic Society. 2008; 28 (12):2353-2358.
Chicago/Turabian StyleMarco Fritsch; Hagen Klemm. 2008. "The water vapor hot gas corrosion of MGC materials with Al2O3 as a phase constituent in a combustion atmosphere." Journal of the European Ceramic Society 28, no. 12: 2353-2358.
The temperature dependence of the hot gas corrosion behaviour of various ceramic materials (Al2O3, ZrO2 (Y-TZP), mullite, ZrSiO4 and YAG) was investigated. The tests were performed in a high temperature burner rig at temperatures between 1200 °C and 1500 °C, a total pressure of 1 atm with a water vapour partial pressure of 0.24 atm, a gas flow velocity of 100 m/s and test times of about 130–300 h. ZrO2 (Y-TZP) showed absolutely no corrosion, however, a very high susceptibility to thermal shock and phase transformation was observed. The other materials suffered degradation above 1300 °C. This was the consequence of the formation and evaporation of volatile hydroxides (e.g. Si(OH)4 and Al(OH)3). YAG showed a low corrosion rate and the formation of a protective surface layer. The corrosion susceptibility of these materials was found to be higher with increasing temperature. Thermochemical calculations of the partial pressure of volatile species formed in reaction with water vapour, affirm the observed differences in corrosion behaviour.
Marco Fritsch; Hagen Klemm; Mathias Herrmann; Bjoern Schenk. Corrosion of selected ceramic materials in hot gas environment. Journal of the European Ceramic Society 2006, 26, 3557 -3565.
AMA StyleMarco Fritsch, Hagen Klemm, Mathias Herrmann, Bjoern Schenk. Corrosion of selected ceramic materials in hot gas environment. Journal of the European Ceramic Society. 2006; 26 (16):3557-3565.
Chicago/Turabian StyleMarco Fritsch; Hagen Klemm; Mathias Herrmann; Bjoern Schenk. 2006. "Corrosion of selected ceramic materials in hot gas environment." Journal of the European Ceramic Society 26, no. 16: 3557-3565.