2023
DOI: 10.3390/batteries9110534
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Differentiating Cyclability and Kinetics of Na+ Ions in Surface-Functionalized and Nanostructured Graphite Using Electrochemical Impedance Spectroscopy

Sonjoy Dey,
Gurpreet Singh

Abstract: The revolution in lithium-ion battery (LIB) technology was partly due to the invention of graphite as a robust negative electrode material. However, equivalent negative electrode materials for complementary sodium ion battery (NIB) technologies are yet to be commercialized due to sluggish reaction kinetics, phase instability, and low energy density originating from the larger size of Na+-ion. Therefore, in search of the next-generation electrode materials for NIBs, we first analyze the failure of graphite duri… Show more

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Cited by 4 publications
(5 citation statements)
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“…Therefore, diffusion coefficient determination from the W−T value is also avoided, as the diffusion would be a result of mixture from both solid and electrolyte phase diffusion. 56 Furthermore, the W−R values indicating the diffusion resistances were highest for the SiOC-GO-R16 (13%, 900 °C) and Ni/SiOC-GO-R16 (38%, 900 °C) electrodes, which can be well corroborated by the low capacity retention observed in Figure 6.…”
Section: Characterization Of Porous Graphene-based Polymer-derived Ce...mentioning
confidence: 54%
“…Therefore, diffusion coefficient determination from the W−T value is also avoided, as the diffusion would be a result of mixture from both solid and electrolyte phase diffusion. 56 Furthermore, the W−R values indicating the diffusion resistances were highest for the SiOC-GO-R16 (13%, 900 °C) and Ni/SiOC-GO-R16 (38%, 900 °C) electrodes, which can be well corroborated by the low capacity retention observed in Figure 6.…”
Section: Characterization Of Porous Graphene-based Polymer-derived Ce...mentioning
confidence: 54%
“…The low-frequency stage of the Nyquist plots showed a sloping line or long tail fitted with a Warburg element to reflect the solid-state diffusion. The fitted W–P values always deviated from an ideal condition, indicating the existence of other processes besides solid-state diffusion, such as migration and liquid/electrolyte phase diffusion …”
Section: Resultsmentioning
confidence: 96%
“…The fitted W–P values always deviated from an ideal condition, indicating the existence of other processes besides solid-state diffusion, such as migration and liquid/electrolyte phase diffusion. 8 …”
Section: Resultsmentioning
confidence: 99%
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