10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
Abstract View
Synthesis of Li1.2Mn0.54Ni0.13Co0.13O2 via Low Temperature Flame Spray Pyrolysis
JOSE MADERO, Kuan-Yu Shen, Jeremy Wojtak, Tianxiang Li, Richard Axelbaum, Washington University in St. Louis
Abstract Number: 1633 Working Group: Combustion-Generated Aerosols: the Desirable and Undesirable
Abstract Lithium, manganese-rich layered cathode material (LMR-NMC) has been studied intensively in the past decades and is one of the most attractive cathode materials under research. Its ability to reach discharge capacity above 200 mAhg-1 and low cobalt content make it a promising candidate for cathode material of electric vehicles. Flame spray pyrolysis has been utilized to synthesize LMR-NMC, however, the material is sensitive to the flame conditions as high temperature may lead to additional phase formation. Herein, a low temperature flame spray pyrolysis (FSP) is proposed for the synthesis of Li1.2Mn0.54Ni0.13Co0.13O2. High water content ethanol was used as a fuel and a swirl-stabilized burner was used to achieve the low reactor temperature which is unlikely to be attained via traditional FSP. The effects of reactor temperature, which is controlled via altering ethanol concentration, on the physical properties and the electrochemical performances of the synthesized materials were characterized. The results indicated that as the flame temperature increased, more distinct Li2MnO3 phase (C2/m) was grown and larger primary particles were formed. Li1.2Mn0.54Ni0.13Co0.13O2 synthesized with 25 wt % ethanol showed the best results and delivered a discharge capacity of 203 mAhg-1 after 100 cycles under C/3. It also achieved good rate capability showing 201 mAhg -1 and 169 mAhg -1 under C/2 and C/1. These results are comparable to the ones demonstrated by Li1.2Mn0.54Ni0.13Co0.13O2 produced via furnace spray pyrolysis and the state-of- the-art co-precipitation.