@article{deGiorgioLaMonacaDinteretal.2018, author = {de Giorgio, Francesca and La Monaca, Andrea and Dinter, Alexander and Frankenberger, Martin and Pettinger, Karl-Heinz and Arbizzani, Catia}, title = {Water-processable Li4Ti5O12 electrodes featuring eco-friendly sodium alginate binder}, series = {Electrochimica Acta}, volume = {289}, journal = {Electrochimica Acta}, doi = {https://doi.org/10.1016/j.electacta.2018.09.017}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:860-opus4-2723}, pages = {112 -- 119}, year = {2018}, abstract = {Electrodes based on Li4Ti5O12 (LTO) with sodium alginate (SA) binder featuring high percentage of active material and operating in glyme-based electrolyte are here proposed for the first time. Three electrode formulations operating in ethylene carbonate: dimethyl carbonatee1M LiPF6 (LP30) and 1m lithium bis(trifluoromethane) sulfonimide - tetraglyme were tested in half-cell vs. Li and compared to conventional 80\% LTO and 10\% polyvinylidene fluoride binder. Electrodes with 87\% LTO and 3\% SA binder show the best performance, with good rate capability and excellent cycling stability over 600 cycles at 1C in both electrolytes. The use of SA is beneficial as it allows made-in-water electrode manufacturing in absence of N-methyl-2-pyrrolidone, a toxic and expensive solvent required by fluorinated binders. SA also permits to decrease its amount to 3\% increasing the active material percentage, and to develop a final device with higher specific energy.}, language = {en} } @article{KazhamiakaKeshavRosenbergetal.2018, author = {Kazhamiaka, Fiodar and Keshav, Srinivasan and Rosenberg, Catherine and Pettinger, Karl-Heinz}, title = {Simple Spec-Based Modelling of Lithium-Ion Batteries}, series = {IEEE Transactions on Energy Conversion}, volume = {33}, journal = {IEEE Transactions on Energy Conversion}, number = {4}, doi = {10.1109/TEC.2018.2838441}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:860-opus4-2732}, pages = {1757 -- 1765}, year = {2018}, abstract = {Lithium-ion battery models that estimate their energy content after a series of charge and discharge operations are essential in the optimal design, analysis and operation of batterybased systems. We focus on the class of battery models that can be calibrated entirely from the battery's manufacturer-provided specifications (spec). Such models are simple to calibrate and are therefore widely used in practice. The best-known model in this category was proposed by Tremblay et al. in 2007. This model, however, has several shortcomings, including low fidelity at high C-rates, and the fact that it does not model the battery management system.We propose an alternative, called the Powerbased Integrated (PI) model that is also completely spec-based, yet has much higher fidelity. We perform two types of validation, the first one uses the voltage profiles in the spec while the other is based on laboratory experiments. Both validations confirm that our model, which we have publicly released as a Simulink system block, has a mean absolute voltage error of less than 0.1 V across a wide range of C-rates.}, language = {en} }