Suppression of Manganese-ion Dissolution by SiO2 Aerosol Addition from Spray Pyrolyzed Li2MnO3-LiMn1/3Ni1/3Co1/3O2

Satoshi HASHIGAMI; Masayuki KAWANISHI; Kei YOSHIMI; Satoshi UJIIE; Toru INAGAKI; Michihiro HASHINOKUCHI; Takayuki DOI; Minoru INABA

doi:10.5796/electrochemistry.84.842

Articles

Suppression of Manganese-ion Dissolution by SiO₂ Aerosol Addition from Spray Pyrolyzed Li₂MnO₃-LiMn_1/3Ni_1/3Co_1/3O₂

Satoshi HASHIGAMI, Masayuki KAWANISHI, Kei YOSHIMI, Satoshi UJIIE, Toru INAGAKI, Michihiro HASHINOKUCHI, Takayuki DOI, Minoru INABA

Author information

Keywords: Spray Pyrolysis, Layered Li₂MnO₃-LiMn_1/3Ni_1/3Co_1/3O₂ Solid-solution, SiO₂, Lithium-ion Battery

JOURNAL FREE ACCESS

2016 Volume 84 Issue 11 Pages 842-847

DOI https://doi.org/10.5796/electrochemistry.84.842

Details

Abstract

Layered Li₂MnO₃-LiMn_1/3Ni_1/3Co_1/3O₂ solid-solution cathode materials modified with SiO₂ were prepared by spray pyrolysis and their charge-discharge properties were investigated. Both the capacity and voltage fades of SiO₂-modified Li₂MnO₃-LiMn_1/3Ni_1/3Co_1/3O₂ during charge/discharge cycling were suppressed compared with that of the unmodified sample. It was found that the addition of SiO₂ suppressed the dissolution of manganese ions at 60°C from the results of inductively coupled plasma (ICP) emission spectroscopy. X-ray diffraction (XRD) data indicated that weak reflections corresponding to Li₂SiO₃ appeared as the SiO₂ content increases to 5 wt%. Scanning electron microscope (SEM) studies showed that the microstructure of the particles was significantly changed by SiO₂ addition. As indicated by transmission electron microscope (TEM) analysis, Si-rich regions were seen on the Li₂MnO₃-LiMn_1/3Ni_1/3Co_1/3O₂ primary particles. The suppression of Mn ions and the improved charge and discharge properties were correlated with the microstructural changes.

Corresponding author

Register with J-STAGE for free!