Understanding the Electrochemical and Interfacial Behavior of Sulfolane based Electrolyte in LiNi0.5Mn1.5O4‐Graphite Full‐Cells

Salian, Girish D.; Mathew, Alma; Gond, Ritambhara; Ekeren, Wessel van; Højberg, Jonathan; Elkjær, Christian Fink; Lacey, Matthew J.; Heiskanen, Satu Kristiina; Brandell, Daniel; Younesi, Reza

doi:10.1002/batt.202200565

Cited by 5 publications

(2 citation statements)

References 45 publications

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“…An increase of about 12 mbar is observed during the first charge, indicating a similar initial formation of CEI and SEI, as observed in an earlier work by our group. 40 However, in the subsequent cycles, the pressure evolution seems to stabilize for PAA, whereas it continues to increase for the CMC binder. From the capacity curves, in Figs.…”

Section: Resultsmentioning

confidence: 99%

Limitations of Polyacrylic Acid Binders When Employed in Thick LNMO Li-ion Battery Electrodes

Mathew,

van Ekeren,

Andersson

et al. 2024

J. Electrochem. Soc.

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Polyacrylic acid (PAA) was studied as a binder material for LiNi0.5Mn1.5O4 (LNMO) cathodes for lithium-ion batteries. When the LNMO electrodes weare fabricated with an active mass loading of ~10 mg cm-2 (~1.5 mA h cm-2), poor discharge capacity and short cycle life was obtained in full-cells with graphite electrodes. The electrochemical results with PAA were compared with a commonly used water-based binder, sodium carboxymethyl cellulose (CMC), which showed better electrochemical performance. The main cause for these problems in PAA based cells was identified to be the high internal resistance in the initial cycles, caused by factors such as contact resistance, inhomogeneous binder distribution, and poor electrolyte wetting of the active material.

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Section: Resultsmentioning

confidence: 99%

Limitations of Polyacrylic Acid Binders When Employed in Thick LNMO Li-ion Battery Electrodes

Mathew,

van Ekeren,

Andersson

et al. 2024

J. Electrochem. Soc.

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“…The oxidative reaction of GaSn started at ≈3 V on the higher voltage side, and the reductive reaction was observed at ≈1 V on the lower voltage side. Because the highly concentrated electrolytes ([Li(G4)][TFSI] and [Li(SL) 3 ][FSI]) used in this experiment have wide electrochemical potential windows in the range of 0-4 V versus Li/Li þ , [27,28] the oxidative and reductive currents at ≈3 and 1 V, respectively, can be attributed to the electrochemical reaction of GaSn. It has been reported that the potential window of EGaIn, a Ga-based liquid metal, is 2 V in ionic liquid electrolytes in which an oxidative current was observed at ≈À0.2 V versus Ag/AgCl (corresponding to ≈3 V vs Li/Li þ ).…”

Section: Evaluation Of Conductive Substrates As Coin Cellsmentioning

confidence: 99%

Liquid Metal Electrode Ink for Printable Lithium‐Ion Batteries

Ozawa,

Nishitai,

Ochirkhuyag

et al. 2024

Adv Eng Mater

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Recent advancements have significantly improved the flexibility of lithium‐ion batteries (LIBs). The battery electrode contains a reaction layer and a current collector layer. Flexible battery electrodes, in which these layers are integrated, are fabricated in a single process, simplifying the electrode fabrication process. However, to date, integrated electrodes have lower conductivity than conventional two‐layer electrodes, and the process that maintains conductivity has not been simplified. This study proposes a liquid metal electrode ink that simultaneously plays the role of the reaction and current collector layers with high conductivity and can be formed in a single process via printing. It employs a gallium‐based liquid metal as a liquid current collector, embedded with Li4Ti5O12 or Li2TiS3 as active materials. These liquid‐metal electrodes exhibit a high electronic conductivity of 104 S cm–1 and can be fabricated without requiring the lengthy post‐processing time associated with conventional inks. Moreover, the ink can be applied directly to various insulating and non‐flat curved substrates, demonstrating its charge‐discharge performance, even when bent to a 1 mm radius to maintain flexibility. Liquid‐metal‐based electrode inks simplify the LIB fabrication process, contributing to efficient production methods for electrodes in future LIBs.This article is protected by copyright. All rights reserved.

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Modelling Lithium‐Ion Transport Properties in Sulfoxides and Sulfones with Polarizable Molecular Dynamics and NMR Spectroscopy

Piacentini,

Simari,

Mangiacapre

et al. 2024

ChemPlusChem

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We present a computational study of the structure and of the transport properties of electrolytes based on Li[(CF3SO2)2N] solutions in mixtures of sulfoxides and sulfones solvents. The simulations of the liquid phases have been carried out using molecular dynamics with a suitably parametrized model of the intermolecular potential based on a polarizable expression of the electrostatic interactions. Pulse field gradient NMR measurements have been used to validate and support the computational findings. Our study show that the electrolytes are characterized by extensive aggregation phenomena of the support salt that, in turn, determine their performance as conductive mediums.

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Understanding the Electrochemical and Interfacial Behavior of Sulfolane based Electrolyte in LiNi_0.5Mn_1.5O₄‐Graphite Full‐Cells

Cited by 5 publications

References 45 publications

Limitations of Polyacrylic Acid Binders When Employed in Thick LNMO Li-ion Battery Electrodes

Limitations of Polyacrylic Acid Binders When Employed in Thick LNMO Li-ion Battery Electrodes

Liquid Metal Electrode Ink for Printable Lithium‐Ion Batteries

Modelling Lithium‐Ion Transport Properties in Sulfoxides and Sulfones with Polarizable Molecular Dynamics and NMR Spectroscopy

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