Probing Structural Evolution and Charge Storage Mechanism of NiO2HxElectrode Materials using In Operando Resonance Raman Spectroscopy.
In operando resonance Raman spectroscopysuggests quantitative correlation between phonon band properties and the amount of charge storage of high-energy density NiO2Hxbattery/pseudocapacitive material. Comparing the spectroscopic evolution using different electrolytes reveals the contributions of breaking/formation of O-H bonds and insertion/extraction of cations to electrochemical charge storage of NiO2Hx.
School of Materials Science and Engineering Center for Innovative Fuel Cell and Battery Technologies Georgia Institute of Technology 771 Ferst Drive Atlanta GA 30332-0245 USA; Laser Dynamics Laboratory School of Chemistry and Biochemistry Georgia Institute of Technology 901 Atlantic Drive Atlanta GA 30332-0400 USA.
Dongchang
D
Chen
School of Materials Science and Engineering Center for Innovative Fuel Cell and Battery Technologies Georgia Institute of Technology 771 Ferst Drive Atlanta GA 30332-0245 USA.
Xunhui
X
Xiong
School of Materials Science and Engineering Center for Innovative Fuel Cell and Battery Technologies Georgia Institute of Technology 771 Ferst Drive Atlanta GA 30332-0245 USA.
Bote
B
Zhao
Laser Dynamics Laboratory School of Chemistry and Biochemistry Georgia Institute of Technology 901 Atlantic Drive Atlanta GA 30332-0400 USA.
Mahmoud A
MA
Mahmoud
Laser Dynamics Laboratory School of Chemistry and Biochemistry Georgia Institute of Technology 901 Atlantic Drive Atlanta GA 30332-0400 USA.
Mostafa A
MA
El-Sayed
School of Materials Science and Engineering Center for Innovative Fuel Cell and Battery Technologies Georgia Institute of Technology 771 Ferst Drive Atlanta GA 30332-0245 USA.
Meilin
M
Liu
battery; nickel hydroxide/oxo‐hydroxide; reaction mechanisms; resonance Raman spectroscopy; supercapacitor