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Adv Sci (Weinh). 2016 Feb 23;3(6):1500433. eCollection 2016 Jun.

Probing Structural Evolution and Charge Storage Mechanism of NiO2H x Electrode Materials using In Operando Resonance Raman Spectroscopy.

Author information

1
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.
2
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.
3
Laser Dynamics Laboratory School of Chemistry and Biochemistry Georgia Institute of Technology 901 Atlantic Drive Atlanta GA 30332-0400 USA.

Abstract

In operando resonance Raman spectroscopy suggests quantitative correlation between phonon band properties and the amount of charge storage of high-energy density NiO2H x battery/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 NiO2H x .

KEYWORDS:

battery; nickel hydroxide/oxo‐hydroxide; reaction mechanisms; resonance Raman spectroscopy; supercapacitor

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