Influence of the Ambient Storage of LiNi<sub>0.8</sub>Mn<sub>0.1</sub>Co<sub>0.1</sub>O<sub>2</sub> Powder and Electrodes on the Electrochemical Performance in Li-ion Technology
Iratxe de Meatza,
Imanol Landa-Medrano,
Susan Sananes-Israel,
Aitor Eguia-Barrio,
Oleksandr Bondarchuk,
Silvia Lijó-Pando,
Iker Boyano,
Verónica Palomares,
Teófilo Rojo,
Hans-Jürgen Grande,
Idoia Urdampilleta
Affiliations
Iratxe de Meatza
CIDETEC, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San Sebastian, Spain
Imanol Landa-Medrano
CIDETEC, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San Sebastian, Spain
Susan Sananes-Israel
CIDETEC, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San Sebastian, Spain
Aitor Eguia-Barrio
CIDETEC, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San Sebastian, Spain
Oleksandr Bondarchuk
International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga, s/n, 4715-330 Braga, Portugal
Silvia Lijó-Pando
CIDETEC, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San Sebastian, Spain
Iker Boyano
CIDETEC, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San Sebastian, Spain
Verónica Palomares
Department of Organic and Inorganic Chemistry, Universidad del País Vasco (UPV/EHU), P.O. Box 664, 48080 Bilbao, Spain
Teófilo Rojo
Department of Organic and Inorganic Chemistry, Universidad del País Vasco (UPV/EHU), P.O. Box 664, 48080 Bilbao, Spain
Hans-Jürgen Grande
CIDETEC, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San Sebastian, Spain
Idoia Urdampilleta
CIDETEC, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San Sebastian, Spain
Nickel-rich LiNi0.8Mn0.1Co0.1O2 (NMC811) is one of the most promising Li-ion battery cathode materials and has attracted the interest of the automotive industry. Nevertheless, storage conditions can affect its properties and performance. In this work, both NMC811 powder and electrodes were storage-aged for one year under room conditions. The aged powder was used to prepare electrodes, and the performance of these two aged samples was compared with reference fresh NMC811 electrodes in full Li-ion coin cells using graphite as a negative electrode. The cells were subjected to electrochemical as well as ante- and postmortem characterization. The performance of the electrodes from aged NM811 was beyond expectations: the cycling performance was high, and the power capability was the highest among the samples analyzed. Materials characterization revealed modifications in the crystal structure and the surface layer of the NMC811 during the storage and electrode processing steps. Differences between aged and fresh electrodes were explained by the formation of a resistive layer at the surface of the former. However, the ageing of NMC811 powder was significantly mitigated during the electrode processing step. These novel results are of interest to cell manufacturers for the widespread implementation of NMC811 as a state-of-the-art cathode material in Li-ion batteries.