Performance of Li4Ti5O12-based reference electrode for the electrochemical analysis of all-solid-state lithium-ion batteries

Ikezawa, Atsunori; Fukunishi, Goro; Okajima, Takaharu; Kitamura, Fusao; Suzuki, Kota; Hirayama, Masaaki; Kanno, Ryoji; Arai, Hajime

doi:10.1016/j.elecom.2020.106743

Cited by 27 publications

(28 citation statements)

References 28 publications

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“…S5), is assumed to be the impedance originating from ion migration and electron conduction processes in the porous LiCoO2 cathode (RHF). 33,34 The Nyquist 1). In addition, the high Li + conductivity might be useful in mitigating the depletion of Li salt in the pores of LiCoO2 composite electrode during the high-rate discharging, 31 leading to the increase in utilization of active material in the composite electrode.…”

Section: As Can Be Seen Inmentioning

confidence: 99%

Electrochemical Properties of Poly(vinylidene fluoride-<i>co</i>-hexafluoropropylene) Gel Electrolytes with High-Concentration Li Salt/Sulfolane for Lithium Batteries

et al. 2021

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Combining highly concentrated electrolytes with a polymer network is a valid approach to simultaneously achieve fast Li + ion transport, high thermal stability, and a wide electrochemical window in a quasi-solid-state form. In this work, flexible gel electrolytes comprising commercially available poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and highly concentrated electrolytes of Li salts/sulfolane (SL) were prepared by a simple solution casting method. The anionic effects of the gel electrolytes on the Li-ion conductivity and charge transfer kinetics at the gel/electrode interface were investigated. The SL-based gel electrolyte with lithium bis(fluorosulfonyl)amide (LiFSA) showed an ionic conductivity of 0.7 mS cm −1 and a high Li transference number (> 0.5) at 30 °C. The charge transfer resistance in a [Li/gel/LiCoO2] cell with LiFSA was lower than that of the cells with lithium bis(trifluoromethanesulfonyl)amide (LiTFSA) or LiBF4, indicating faster interfacial charge transfer kinetics in the gel electrolyte with FSA. The Li/LiCoO2 cell with the LiFSA/SL gel electrolyte exhibited a higher capacity than that of the cells with the LiTFSA/SL and LiBF4/SL gel electrolytes. Hence, rationally designed gel electrolytes containing highly concentrated SL-based electrolytes enable the high rate performance of Li batteries.

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Section: As Can Be Seen Inmentioning

confidence: 99%

Electrochemical Properties of Poly(vinylidene fluoride-<i>co</i>-hexafluoropropylene) Gel Electrolytes with High-Concentration Li Salt/Sulfolane for Lithium Batteries

et al. 2021

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“…28,34 Thus, attempts have been made to use the equilibrium state of two-phase insertion-type compounds such as olivine LiFePO 4 , spinel Li 4 Ti 5 O 12 , and NASICON Na 3 V 2 (PO 4 ) 3 . [34][35][36][37][38] These materials with flat plateaus during charge-discharge are considered suitable for use as reference electrodes.…”

Section: Advanced Reference/counter Electrodesmentioning

confidence: 99%

“…Although it is not easy to construct three-electrode cells similar to liquid systems for all-solid-state batteries, researchers have reported three-electrode cells for the characterization of all-solid-state batteries. 36,60,61 In lithium-ion battery research, there is a great need to measure the potential and polarization (resistance) of the positive and negative electrodes using three-electrode cells to identify the dominant factors limiting the battery performance and the degradation sites. For example, Ikezawa et al prepared an allsolid-state three-electrode cell using a chemically reduced Li 4 Ti 5 O 12 reference electrode for impedance analysis.…”

Section: All-solid-state Batteriesmentioning

confidence: 99%

Electrode Potentials Part 2: Nonaqueous and Solid-State Systems

Hwang

Yamamoto

Sakuda³

et al. 2022

Electrochemistry

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This comprehensive paper, Electrode Potentials Part 2, is a continuation of Electrode Potentials Part 1: Fundamentals and Aqueous Systems. Determining the electrode potential is crucial for understanding the nature of the electrochemical properties of materials or systems; however, an accurate evaluation of the potential of a target electrode has always been a challenge. The electrode potential can be used to predict the reaction mechanisms in electrochemistry and can be directly applied to the study of electrochemical applications. This paper introduces the methodologies and strategies for measuring electrode potentials in nonaqueous and solid-state electrolytes, including organic solvent electrolytes, ionic liquid electrolytes, and oxide and sulfide solid electrolytes. Experimental details are described for basic to state-of-the-art strategies, focusing on practical methods and know-how.

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“…However, Li 4 Ti 5 O 12 (LTO) spinel material, 11–14 ranking at the second large market share after graphite, is a promising anode material as it has a combination of longer cycle lives, fast charge/discharge rates (see the comparison of various anode materials and their full cell performances in Table 1), 15,16,17 safer with both conventional and low‐temperature (LT) electrolytes, 18 and an extremely flat potential result from LTO–Li 7 Ti 5 O 12 two‐phase reaction 19 . In addition, as a stable Li + conductor, LTO has also been used as the reference/monitoring electrode, 20,21 potentiometric CO 2 sensor, 22 or coating shell of Si high‐energy anodes, 23 presenting extensive application prospects in energy and environment fields. LTO and Li 7 Ti 5 O 12 (Li7) have extremely similar lattice parameters.…”

Section: Introductionmentioning

confidence: 99%

Li₄Ti₅O₁₂ spinel anode: Fundamentals and advances in rechargeable batteries

Zhang

Yang

et al. 2021

InfoMat

111

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The Li4Ti5O12 (LTO) spinel material, ranking at the second large market share after graphite, is a promising anode material for lithium‐ion batteries due to its good cycle stability, rate capability, and safety with both conventional and low‐temperature electrolytes. However, several critical challenges, such as the low capacity and gassing issue, hindered the wide applications of LTO anode. Recent progress indicated that the LTO performances are possible to be further improved by novel strategies, such as heterogeneous phase control, surface engineering, or overlithiation. To rethink and develop advanced LTO anodes, this review intensively associates the performances and modification strategies with the electronics/crystal structures. From a thermodynamic/kinetic point of view, we summarized the data obtained from recently developed characterization techniques, and the results of electrochemical performances and fundamental structures of LTO to potentially address several key challenges and issues toward advanced LTO anodes. As a result, light is shed on the future research direction of the LTO anodes.image

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Performance of Li4Ti5O12-based reference electrode for the electrochemical analysis of all-solid-state lithium-ion batteries

Cited by 27 publications

References 28 publications

Electrochemical Properties of Poly(vinylidene fluoride-<i>co</i>-hexafluoropropylene) Gel Electrolytes with High-Concentration Li Salt/Sulfolane for Lithium Batteries

Electrochemical Properties of Poly(vinylidene fluoride-<i>co</i>-hexafluoropropylene) Gel Electrolytes with High-Concentration Li Salt/Sulfolane for Lithium Batteries

Electrode Potentials Part 2: Nonaqueous and Solid-State Systems

Li₄Ti₅O₁₂ spinel anode: Fundamentals and advances in rechargeable batteries

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Performance of Li4Ti5O12-based reference electrode for the electrochemical analysis of all-solid-state lithium-ion batteries

Cited by 27 publications

References 28 publications

Electrochemical Properties of Poly(vinylidene fluoride-<i>co</i>-hexafluoropropylene) Gel Electrolytes with High-Concentration Li Salt/Sulfolane for Lithium Batteries

Electrochemical Properties of Poly(vinylidene fluoride-<i>co</i>-hexafluoropropylene) Gel Electrolytes with High-Concentration Li Salt/Sulfolane for Lithium Batteries

Electrode Potentials Part 2: Nonaqueous and Solid-State Systems

Li4Ti5O12 spinel anode: Fundamentals and advances in rechargeable batteries

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Li₄Ti₅O₁₂ spinel anode: Fundamentals and advances in rechargeable batteries