Benzotriazole as an electrolyte additive on lithium-ion batteries performance

Hamenu, Louis; Madzvamuse, Alfred; Mohammed, Latifatu; Lee, Yong Min; Ko, Jang Myoun; Bon, Chris Yeajoon; Cho, Won Il; Baek, Yong Gu; Park, Jong‐Wook

doi:10.1016/j.jiec.2017.04.031

Cited by 16 publications

(5 citation statements)

References 17 publications

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“…65 At high C-rates, the decrease in capacity with the presence of additives is more significant and attributable partly to the high resistive film formed on the cathode. 67,68 Other contributing factor may be related to the undesirable interactions between the additive and electrolyte. For example, Gang Ning et al attributed the capacity loss in cells (LiCoO 2 /C) at high C-rates to the loss in carbon active material, resulting in the increase in internal resistance, as well as the formation of a thick solid electrolyte interphase (SEI) that consumes Li + .…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Study of Functional Additives for Li-Ion Batteries

Khodr

Mallet

Daigle

et al. 2020

J. Electrochem. Soc.

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In the battery industry, the performance of lithium-ion batteries operating at a high voltage is enhanced by utilizing functional additives in electrolytes to achieve higher energy densities and longer lifetimes. These additives chemically stabilize the electrolyte and aid in the formation of a stable cathode electrolyte interphase (CEI). In this paper, the investigation of oxidative potentials of more than 100 additives, using density functional theory calculations to determine the best candidates for CEI formation, is reported. The method was validated by comparing the calculated oxidation potentials and the experimental data obtained using linear sweep voltammetry based on the evaluation of 18 candidates. Further electrochemical studies (AC impedance and cycling stability) on six selected additives were conducted. Among the tested additives, the addition of quinacridone at 0.03% weight concentration resulted in the formation of a less resistive surface film on the cathode in Li/Ni0.5Mn0.3Co0.2O2 coin cells. Moreover, the capacity retention in Gr/Ni0.5Mn0.3Co0.2O coin cells increased from 62% to 77% after 200 cycles at 1C and approximately 4.4 V. The derived results suggest that the combination of the oxidation potential prediction with impedance study could be used as a powerful tool to properly and efficiently select CEI-forming additive candidates for improved battery performance.

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Section: Resultsmentioning

confidence: 99%

Electrochemical Study of Functional Additives for Li-Ion Batteries

Khodr

Mallet

Daigle

et al. 2020

J. Electrochem. Soc.

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“…As the potential scans cathodically from the open circuit voltage (OCV, typically about 2.9‐3 V) to 0.01 V for the Si anode in the first cycle, the SEI film starts being formed (at about 0.5 V‐0.8 V) due to the electrolyte decomposition as shown in Figure . Ideally, the SEI allows only the lithium ions to pass through and alloy into the Si anode at about 0.2 V. This film protects the electrolyte solution from further reductive salt‐mediated decomposition ,…”

Section: Resultsmentioning

confidence: 99%

Effect of Morphologically Different Conductive Agents on the Performance of Silicon Anode in Lithium‐Ion Batteries

et al. 2018

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The performance of electrochemical electrodes, is largely dependent on the extent of efficient electrical contacts between particles, and secondly, between the current collector and the particles, amongst other factors. We report on the electrical conductivity of silicon anode electrodes that have been prepared by using conductive agents with different morphological properties. Super P® Li (SP), VGCF®‐H vapor grown carbon fibers (VGCF), and their mixture were incorporated separately into the anode electrode to observe their distinctive resultant performance. The morphological characterization was done using scanning electron microscopy whilst the electrochemical properties of the prepared electrodes were characterized by electrical resistivity test, cyclic voltammetry, charge/discharge tests and electrochemical impedance spectroscopy. The combination of VGCF®‐H and Super P® Li, results in improved performance of the anode, due to their synergistic interactions which reduce the effects encountered during the failure of the silicon anode electrode caused by large volume changes. These findings unlock new opportunities for the exploration and development of other morphologically useful conductive agents to improve silicon anode in lithium ion batteries.

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“…As the bridge connecting the positive and negative electrodes and a media for Li ion transportation, the electrolyte plays a crucial role affecting many electrochemical properties of the battery system including reversible capacity, rate capability, cycling performance, operating temperature range, and so on. − Structurally, electrolyte is a macroscopic homogeneous system with short-range order and long-range disorder characteristics. In an electrolyte with multiple solvents, the Li ion is always preferentially or selectively solvated. − The size and the structure of the solvation layer not only influence the migration of Li ion in the electrolyte but also affect the interfacial reaction mode and kinetics. − Additives are commonly used ingredients in electrolyte solutions. − Although the dosage is not large, additives are always quite effective and contribute to a significant electrochemical improvement of a cell.…”

Section: Introductionmentioning

confidence: 99%

Fluoro-Ether as a Bifunctional Interphase Electrolyte Additive with Graphite/LiNi_0.5Co_0.2Mn_0.3O₂ Full Cell

Heng

Wang

et al. 2019

ACS Appl. Energy Mater.

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In this paper, 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (TTE) is adopted as a bifunctional electrolyte additive, which is identified to effectively stabilize the surface for both graphite anode and LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NCM523) cathode within the graphite/NCM523 full cell. The overall electrochemical performances of the full cell are significantly enhanced with 3 wt % TTE additive in a conventional organic electrolyte. A combination of studies of scanning electronic microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FTIR) spectroscopy show that a uniform, compact, and stable solid electrolyte interphase (SEI) with improved mechanics on the graphite anode and an effective cathode electrolyte interphase (CEI) on the NCM523 cathode is developed. The electron-withdrawing C−F group contributes to the stable and compact surface film, which explains the electrochemical enhancement of the NCM523/ graphite full cell.

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Benzotriazole as an electrolyte additive on lithium-ion batteries performance

Cited by 16 publications

References 17 publications

Electrochemical Study of Functional Additives for Li-Ion Batteries

Electrochemical Study of Functional Additives for Li-Ion Batteries

Effect of Morphologically Different Conductive Agents on the Performance of Silicon Anode in Lithium‐Ion Batteries

Fluoro-Ether as a Bifunctional Interphase Electrolyte Additive with Graphite/LiNi_0.5Co_0.2Mn_0.3O₂ Full Cell

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Benzotriazole as an electrolyte additive on lithium-ion batteries performance

Cited by 16 publications

References 17 publications

Electrochemical Study of Functional Additives for Li-Ion Batteries

Electrochemical Study of Functional Additives for Li-Ion Batteries

Effect of Morphologically Different Conductive Agents on the Performance of Silicon Anode in Lithium‐Ion Batteries

Fluoro-Ether as a Bifunctional Interphase Electrolyte Additive with Graphite/LiNi0.5Co0.2Mn0.3O2 Full Cell

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Product

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Fluoro-Ether as a Bifunctional Interphase Electrolyte Additive with Graphite/LiNi_0.5Co_0.2Mn_0.3O₂ Full Cell