Fabrication and interfacial characterization of Ni-rich thin-film cathodes for stable Li-ion batteries

Ni-rich LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM) and LiNbO 3 -protected LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM) thin-film cathodes have been prepared by radio frequency (RF) magnetron sputtering. Electrochemical investigations show enhanced stability of LiNbO 3 -protected cathodes compared with bare LiNi 0.6 Co 0.2 Mn 0.2 O 2 . The interfacial interaction of LiNbO 3 and LiNi 0.6 Co 0.2 Mn 0.2 O 2 layers has been investigated by XPS depth profiling and demonstrated different cathode electrolyte interface (CEI) film formation processes at the electrodes. The results elaborate on the interaction between LiNbO 3 and LiNi 0.6 Co 0.2 Mn 0.2 O 2 , emphasizing the role of the LiNbO 3 layer in improving the cycling performance of Ni-rich cathodes. (c) 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/4.0/ )

Automated summary

Ni-rich LiNi0.6Co0.2Mn0.2O2 and LiNbO3-protected thin-film cathodes were prepared by RF magnetron sputtering. The research demonstrates that the LiNbO3 layer plays a crucial role in enhancing the stability and cycling performance of cathodes.