Progressive In Situ Reduction of Graphene Oxide Studied by Raman Spectroelectrochemistry: Implications for a Spontaneous Activation of LiFePO 4  (Olivine) | Zendy

Bousa Milan | Zendy; Frank Otakar | Zendy; Kavan Ladislav | Zendy

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Progressive In Situ Reduction of Graphene Oxide Studied by Raman Spectroelectrochemistry: Implications for a Spontaneous Activation of LiFePO 4 (Olivine)

Author(s) -

Bousa Milan,

Frank Otakar,

Kavan Ladislav

Publication year - 2014

Publication title -

electroanalysis

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.574

H-Index - 128

eISSN - 1521-4109

pISSN - 1040-0397

DOI - 10.1002/elan.201300340

Subject(s) - graphene , raman spectroscopy , in situ , oxide , electrochemistry , olivine , materials science , electrode , chemical engineering , chemistry , nanotechnology , mineralogy , metallurgy , organic chemistry , physics , engineering , optics

LiFePO 4 olivine (LFP) with few‐layer graphene oxide (FLGO) was tested by repeated electrochemical charging/discharging. Here we report on a novel effect that the LFP/FLGO composite, which is electrochemically almost idle in a freshly made state, spontaneously enhances its activity, when the charge/discharge cycling progresses. Based on electrochemical, IR and Raman studies, we suggest that a gradual in situ reduction of FLGO is responsible for this activation.

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