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Enhanced electrochemical performance and thermal stability of ZrO2- And rGO-ZrO2-Coated Li[Ni0.8Co0.1Mn0.1]O2Cathode material for Li-Ion batteries
, Article ACS Applied Energy Materials ; Volume 4, Issue 1 , 2021 , Pages 934-945 ; 25740962 (ISSN) ; Razmjoo Khollari, M. A ; Esmaeili, M ; Heidari, E ; Hosseini Hosseinabad, S. M ; Siavash Moakhar, R ; Dolati, A ; Ramakrishna, S ; Sharif University of Technology
American Chemical Society
2021
Abstract
LiNi0.8Co0.1Mn0.1O2 (NCM811) has been considered as a promising cathode for Li-ion batteries (LIBs) due to its high electrochemical capacity and low cost; however, poor cycling stability is one of the main restricting factors in industrial applications of the NCM811 cathode material. Notably, the capacity fading and low structural stability of NCM811 are intensified at elevated temperatures. ZrO2- and composite rGO-ZrO2-coated NCM811 were fabricated by a facile wet chemical method and evaluated at 25 and 55 °C to overcome these impediments. The ZrO2 coating provides superior cycling and thermal stability and perfectly protects the cathode active material from deleterious side reactions, and...
Corrosion-wear behavior of AA1050/mischmetal oxides surface nanocomposite fabricated by friction stir processing
, Article Journal of Alloys and Compounds ; Volume 832 , 2020 ; Razmjoo Khollari, M. A ; Ebadi, M ; Alishavandi, S ; Kokabi, A. H ; Sharif University of Technology
Elsevier Ltd
2020
Abstract
In this study, the wear and corrosion characteristics of six-pass friction stir processed (FSPed) AA1050/mischmetal oxide nanocomposite (6PPA) was compared to six-pass FSPed sample without powder (6 PA) and annealed base metal (BM). Different wear characteristics, such as weight loss, wear rate and coefficient of friction (COF) were studied. In order to evaluate the corrosion resistance of samples, immersion and cyclic polarization tests were performed. In addition, worn and corroded surfaces were investigated by field emission scanning electron microscopy (FESEM). The result of pin on disk dry sliding wear test revealed that wear resistance improved by employing FSP through finer grain...