Electrochemical Energy Storage: Current and Emerging Technologies

Loupe, Neili; Doan, Jonathan; Gurau, Bogdan; Smotkin, Eugene S.

doi:10.1007/978-3-319-52287-6_31

Cited by 7 publications

(3 citation statements)

References 125 publications

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“…Recent studies on the electrical conductivity of oxide and sulfide-based materials indicate that sulfide-based materials are generally more conductive compared to their oxide counterparts. 40 This may be attributed to the presence of relatively more labile d electrons in sulfur as compared to the p electrons of oxygen. We believe that the superior conductivity of sulfides may make more surface sites electrically accessible in NiCo 2 O x S 4– x .…”

Section: Results and Characterizationmentioning

confidence: 99%

Effect of Intrinsic Properties of Anions on the Electrocatalytic Activity of NiCo₂O₄ and NiCo₂O_xS_4–x Grown by Chemical Bath Deposition

Ganguli¹,

Das²,

Kumari³

et al. 2018

ACS Omega

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Electrochemical water (H 2 O) splitting is one of the most promising technologies for energy storage by hydrogen (H 2 ) generation but suffers from the requirement of high overpotential in the anodic half-reaction (oxygen evolution), which is a four-electron process. Though transition-metal oxides and oxysulfides are increasingly researched and used as oxygen evolution electrocatalysts, the bases of their differential activities are not properly understood. In this article, we have synthesized NiCo 2 O 4 and NiCo 2 O x S 4– x by a chemical bath deposition technique, and the latter has shown better oxygen evolution performance, both in terms of stability and activity, under alkaline conditions. Comprehensive analysis through time-dependent cyclic voltammetry, microscopy, and elemental analysis reveal that the higher activity of NiCo 2 O x S 4– x may be attributed to the lower metal–sulfur bond energy that facilitates the activation process to form the active metal hydroxide/oxyhydroxide species, higher electrochemically active surface area, higher pore diameter and rugged morphology that prevents corrosion. This work provides significant insights on the advantages of sulfur-containing materials as electrochemical precatalysts over their oxide counterparts for oxygen evolution reaction.

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Section: Results and Characterizationmentioning

confidence: 99%

Effect of Intrinsic Properties of Anions on the Electrocatalytic Activity of NiCo₂O₄ and NiCo₂O_xS_4–x Grown by Chemical Bath Deposition

Ganguli¹,

Das²,

Kumari³

et al. 2018

ACS Omega

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“…Also, users can consider increasing the cut-off voltage so as to reduce the chance of not showing peak(s) of interest in a charge process, which can be safely applicable especially in LFP battery since it has a wide overcharge tolerance and overcharging up to 4.2 V is safe. 39 However, users have to be cautious that other battery types, such as lithium cobalt oxide battery, can have much narrower tolerance on overcharging. In addition, one may consider the discharge data for estimating the SOH, provided that the discharge has to be at constant and appropriately low rate (to avoid characteristic peaks being masked by charge-transfer related overpotential 6 ).…”

Section: Results-comparison On Ic Curve Fitting Between the Proposed ...mentioning

confidence: 99%

SOH Estimation and SOC Recalibration of Lithium-Ion Battery with Incremental Capacity Analysis & Cubic Smoothing Spline

Lin

Cabrera

et al. 2020

J. Electrochem. Soc.

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Conventional state of health (SOH) estimation often requires capacity measurement from battery’s full charge or discharge profile between fully charged state and cut-off state. Incremental capacity analysis can improve estimation efficiency by extracting features to estimate SOH or recalibrate state of charge estimation without using full profile. While direct numerical derivatives often do not show smooth result due to measurement noise, this paper utilizes robust cubic smoothing spline method on producing incremental capacity curve, which is superior over typical filters that require tuning on window size usually by trial&error because smoothing parameters in the proposed method can be determined by cross validation. Comparison through simulated data shows that the proposed method maintains good fidelity on data and feature of interest with low RMSE values under derivative form. This paper also proposes a peak height ratio feature for SOH estimation. While a linear relationship is noted between SOH and peak height ratio, estimation of SOH from peak height ratio is demonstrated using linear regression. A more generalized version of SOH estimation method is also demonstrated using multiple linear regression with covariates of both peak height ratio and the height of peak associated with “last phase-transition of Li ions intercalation during charging.”

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“…The primary functional group contributors, in both modes, are the reverse of the historical assignments. 3,27,30,31,38,39 Proton The correlations of ionomer exchange site local symmetry, state-of-hydration, and ionexchange, to density functional theory (DFT) calculated normal modes and observed IR bands would be better understood and reinforced if extended to other sulfonated ionomers. 3, 30-32, 38, 40 This normalized intensity above 1% of the largest peak were selected for viewing.…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

Infrared spectroscopy of ion-induced cross-linked sulfonated poly(ether ether ketone)

Anderson

Kingston

Romeo

et al. 2016

Polymer

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The dehydration of SPEEK-[H] (protonated sulfonated poly(ether ether ketone)) converts 3-fold symmetric (C 3V) hydrated sulfonate sites to sulfonic acid sites with no local symmetry (C 1). Like Nafion-[H], SPEEK-[H] C 3V and C 1 environments afford IR group modes (C 3V,HF (1087 cm-1); C 3V,LF (1026 cm-1) and C 1,HF (1362 cm-1); C 1,LF (904 cm-1)) due to the mechanical coupling of vibrational internal coordinates of an ether link with those of the sulfonate or sulfonic acid exchange site. C 3V and C 1 bands are inversely correlated during membrane hydration/dehydration. Hydrated SPEEK-[M] (M: Cu 2+ , Ni 2+ , Cd 2+ , Pb 2+ , Sr 2+ or Ba 2+) exhibits SPEEK-[H] C 3V bands because cation waters of hydration preclude binding to the hydrated exchange site. When cation hydration spheres are thermally stripped at high vacuum, SPEEK-[M] C 3V bands supplant SPEEK-[H] C 3V bands, inducing SPEEK cross-linking. Incomplete cross-linking is evidenced by low intensities of SPEEK-[M] C 1,HF bands. The 1362 cm-1 band intensities are inversely correlated with cation hydration enthalpies.

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Electrochemical Energy Storage: Current and Emerging Technologies

Cited by 7 publications

References 125 publications

Effect of Intrinsic Properties of Anions on the Electrocatalytic Activity of NiCo₂O₄ and NiCo₂O_xS_4–x Grown by Chemical Bath Deposition

Effect of Intrinsic Properties of Anions on the Electrocatalytic Activity of NiCo₂O₄ and NiCo₂O_xS_4–x Grown by Chemical Bath Deposition

SOH Estimation and SOC Recalibration of Lithium-Ion Battery with Incremental Capacity Analysis & Cubic Smoothing Spline

Infrared spectroscopy of ion-induced cross-linked sulfonated poly(ether ether ketone)

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Electrochemical Energy Storage: Current and Emerging Technologies

Cited by 7 publications

References 125 publications

Effect of Intrinsic Properties of Anions on the Electrocatalytic Activity of NiCo2O4 and NiCo2OxS4–x Grown by Chemical Bath Deposition

Effect of Intrinsic Properties of Anions on the Electrocatalytic Activity of NiCo2O4 and NiCo2OxS4–x Grown by Chemical Bath Deposition

SOH Estimation and SOC Recalibration of Lithium-Ion Battery with Incremental Capacity Analysis & Cubic Smoothing Spline

Infrared spectroscopy of ion-induced cross-linked sulfonated poly(ether ether ketone)

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Effect of Intrinsic Properties of Anions on the Electrocatalytic Activity of NiCo₂O₄ and NiCo₂O_xS_4–x Grown by Chemical Bath Deposition

Effect of Intrinsic Properties of Anions on the Electrocatalytic Activity of NiCo₂O₄ and NiCo₂O_xS_4–x Grown by Chemical Bath Deposition