History of Modern Thermoelectrochemistry

Gründler, Peter

doi:10.1007/978-3-662-45818-1_3

Cited by 1 publication

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“…It is worth noting that, to the best of our knowledge, the possible effects of temperature on anion graphite intercalation and blister growth have never been considered. Some studies regarding electrodes in the cathodic regime [3], Li-batteries applications [12], Li diffusion rate in graphite [13] and intercalation [14], aging of electrodes [15], and the role of organic solvents [16] have been performed (refer to the review reported in [17] for a brief history on thermoelectrochemistry), but the role of temperature within the Hathcock model is still missing. In this work, we apply an in-situ atomic force microscopy (AFM) apparatus to explore the highly oriented pyrolite graphite (HOPG) morphology after the application of an increasing EC potential (CV) when immersed inside a hot (namely, 343 K) acid electrolyte.…”

Section: Condens Matter 2019 4 For Peer Reviewmentioning

confidence: 99%

Temperature Effects on the HOPG Intercalation Process

et al. 2019

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Graphite intercalation via chemical strategies is a common procedure to delaminate stratified crystals and obtain a suspension of graphene flakes. The intercalation mechanism at the molecular level is still under investigation in view of enhancing graphene production and reducing damage to the original pristine crystal. The latter, in particular, can undergo surface detriment due to both blister evolution and carbon dissolution. The role of the electrolyte temperature in this process has never been investigated. Here, by using an in-situ atomic force microscopy (AFM) apparatus, we explore surface morphology changes after the application of fast cyclic-voltammetries at 343 K, in view of de-coupling the crystal swelling phenomenon from the other electrochemical processes. We find that blisters do not evolve as a consequence of the increasing temperature, while the quality of the graphite surface becomes significantly worse, due to the formation of some adsorbates on possible defect sites of the electrode surface. Our results suggest that the chemical baths used in graphite delamination must be carefully monitored in temperature for avoiding undesired electrode detriment.

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