Spontaneous reaction between an uncharged lithium iron silicate cathode and a LiPF6-based electrolyte.
The reaction between an uncharged Li2FeSiO4 (LFS) cathode and a LiPF6-EC/DMC electrolyte is revealed by in situ XANES in coin cells. This study shows clear evidence of delithiation and iron oxidation in LFS prior to cycling. Subsequent cycling appears to partially restore the original lithiation level, an observation that needs to be taken into consideration in future LFS development work.
Department of Physics, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada. djiang@uoguelph.ca.
Zachary
Z
Arthur
Materials Engineering, McGill University, Montreal, QC H3A 0C5, Canada. george.demopoulos@mcgill.ca.
Hsien-Chieh
HC
Chiu
Materials Engineering, McGill University, Montreal, QC H3A 0C5, Canada. george.demopoulos@mcgill.ca.
Xia
X
Lu
Canadian Light Source, 44 Innovation Boulevard, Saskatoon, SK S7N 2V3, Canada.
Ning
N
Chen
Department of Physics, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada. djiang@uoguelph.ca.
Vincent
V
Emond
Institut de Recherche d'Hydro-Québec (IREQ), Varennes, QC J3X 1S1, Canada.
Karim
K
Zaghib
Department of Physics, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada. djiang@uoguelph.ca.
De-Tong
DT
Jiang
Materials Engineering, McGill University, Montreal, QC H3A 0C5, Canada. george.demopoulos@mcgill.ca.
George P
GP
Demopoulos
D011211:Electric Power Supplies; D004566:Electrodes; D004573:Electrolytes / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D008094:Lithium / Q000737:chemistry*; D010084:Oxidation-Reduction; D017640:Silicates / Q000737:chemistry*
D004573:Electrolytes; D017640:Silicates; D008094:Lithium; D007501:Iron