Electrolyte additives for lithium ion battery electrodes: progress and perspectives

Haregewoin, Abebe; Wotango, Aselefech Sorsa; Hwang, Bing‐Joe

doi:10.1039/c6ee00123h

Cited by 698 publications

(511 citation statements)

References 302 publications

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“…All of the electrodes were first tested at the same current density of 0.1 C. It can be seen that an irreversible capacity losses are observed during the initial two cycles, which may be attributable to the decomposition of the electrolyte and/or solvent. 56,57 Even so, the first discharge capacity of 2015.2 mA h g -1 for the α-Fe 2 O 3 @r-GO In order to investigate the intrinsic electrochemical and kinetic mechanism of the hybrid electrode materials, electrochemical impedance spectroscopy (EIS) measurements were carried out. Fig.7f presents the Nyquist plots of the pure r-GO, α-Fe 2 O 3 NRs, and α-Fe 2 O 3 @r-GO NRAs hybrid electrodes tested after the first cycles.…”

Section: Resultsmentioning

confidence: 99%

Seed-assisted growth of α-Fe₂O₃ nanorod arrays on reduced graphene oxide: a superior anode for high-performance Li-ion and Na-ion batteries

et al. 2016

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The α-Fe 2 O 3 nanorods/reduced graphene oxide nanosheets composites (denoted as α-Fe 2 O 3 @r-GO NRAs) are fabricated by a facile and scalable seeds-assisted hydrothermal growth route, in which the α-Fe 2 O 3 nanorods are assembled onto the side surfaces of r-GO nanosheets. Such α-Fe 2 O 3 @r-GO hybrid nanostructures are tested as anodes for both Li-ion and Na-ion batteries (LIBs and SIBs), which exhibits excellent performance with high capacity and long-cycling stability. When used for LIBs, the hybrid α-Fe 2 O 3 @r-GO NRAs electrode exhibits a highly stable Li + storage capacity of 1200 mAh g -1 after 500 cycles at 0.2 C and excellent rate capability. Moreover, the hybrid α-Fe 2 O 3 @r-GO NRAs also displays its versatility as an anode for SIBs, which delivers high reversible Na + storage capacity of 332 mAh g -1 at 0.2 C over 300 cycles with long-term cycling stability. The excellent electrochemical performance for the hybrid α-Fe 2 O 3 @r-GO NRAs anodes could be ascribed to the synergistic effect between the α-Fe 2 O 3 nanorods arrays and reduced graphene oxide nanosheets, which could availably promote the charge transport and accommodate the volume change upon long-term charge-discharge process for reversible Li + or Na + storage.

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Section: Resultsmentioning

confidence: 99%

Seed-assisted growth of α-Fe₂O₃ nanorod arrays on reduced graphene oxide: a superior anode for high-performance Li-ion and Na-ion batteries

et al. 2016

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“…The use of new solvent blends and the introduction of electrolyte additives are two common ways to improve the lifetime of high voltage NMC Li-ion cells. [10][11][12][13][14][15][16][17][18][19][20][21][22] Ma et al and Nelson et al found that a ternary additive combination can greatly improve NMC442/graphite cell performance at high voltage. 10,11,23 Xia et al reported that fluorinated electrolyte and sulfone-based electrolyte also enhance NMC/graphite cell performance.…”

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Some Physical Properties of Ethylene Carbonate-Free Electrolytes

Xiong

Bauer

Ellis

et al. 2018

J. Electrochem. Soc.

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Physical properties of LiPF 6 in ethyl methyl carbonate (EMC) and dimethyl carbonate (DMC) electrolytes were studied by conductivity measurements, Fourier transform infrared spectroscopy (FT-IR) and differential thermal analysis (DTA). Conductivity measurements show that the addition of additive levels of FEC to EMC electrolyte can dramatically increase the conductivity of EC-free EMC electrolytes at low salt concentrations below 0.4 M. FT-IR results show that the added FEC hinders ion pair formation by competing with EMC to dissociate LiPF 6 resulting in increased conductivity in EMC electrolytes. Conductivity measurements show that the conductivity of DMC electrolytes decreases significantly below 0 • C due to the high melting point of DMC. Differential thermal analysis was used to determine the LiPF 6 -DMC phase diagram which then can be used to explain the conductivity results. The results presented here identify avenues by which EC-free electrolytes can be improved for use in practical Li-ion cells. Li-ion battery packs for electrified vehicles and grid energy storage require high energy density and long lifetime cells.1-3 One approach to increase the energy density of Li-ion cells is to adopt high potential positive electrodes. Layered Li[Ni x Mn y Co 1-x-y ]O 2 materials have been extensively investigated since they are cheaper alternatives to LCO and since they can function at high potentials. 4-9However, it is a great challenge to cycle high voltage NMC cells (above 4.3V) well. The use of new solvent blends and the introduction of electrolyte additives are two common ways to improve the lifetime of high voltage NMC Li-ion cells. 24-32 Therefore, it is important to study the physical properties of EC-free electrolytes to optimize the performance of cells where EC-free electrolytes are used.Differential scanning calorimetry (DSC) 29,32,33 and differential thermal analysis (DTA) 34 can be used to examine the phase diagrams of solvent blends and of electrolytes. Ding et al. showed that supercooling and superheating during DSC measurements for phase diagram determination could be dramatically reduced if carbon black and/or electrode powders were present in the samples during measurement. 33Recently Day et al. demonstrated that the DTA technique can be applied to an entire Li-ion cell and is a non-invasive in-situ method to probe the state of the liquid electrolyte within intact Li-ion cells. 34The DTA measurements provide information about the amount of liquid electrolyte remaining in the cell and about the electrolyte composition. The interpretation of the DTA results requires information about the phase diagram of the electrolyte of interest. However, the phase diagrams of LiPF 6 :ethyl methyl carbonate and LiPF 6 :dimethyl carbonate electrolytes have not yet been reported.In this report, the conductivity of LiPF 6 :EMC electrolytes with various salt concentrations were measured over a wide range of temperatures. Fourier transform infrared spectroscopy (FT-IR) was used to study the interactions between t...

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“…The progresses and prospective in functional additives for LIBs are reviewed recently, ranging from negatrode additives, positrode additives, safety additives, and salt type additives. 146 …”

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Electrolytes for electrochemical energy storage

Xia

et al. 2017

Mater. Chem. Front.

225

116

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.For more information, please contact eprints@nottingham.ac.uk Journal NameThis journal is © The Royal Society of Chemistry 20xxJ. Name., 2013, 00, 1-3 | 1 Electrolyte is a key component of electrochemical energy storage (EES) devices and its properties greatly affect the energy capacity, rate performance, cyclability and safety of all EES devices. This article offers a critical review of recent progresses and challenges in electrolyte research and development particularly for supercapacitors and supercapatteries, recharegable batteries (such as lithium-ion and sodium-ion batteries), and redox flow batteries (including fuel cells in a broad sense). The review will focus on liquid electrolytes, particularly aqueous and organic electrolytes, ionic liquids and molten salts. Influences of electrolyte properties on the performances of different EES devices are discussed in detail.

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Electrolyte additives for lithium ion battery electrodes: progress and perspectives

Cited by 698 publications

References 302 publications

Seed-assisted growth of α-Fe₂O₃ nanorod arrays on reduced graphene oxide: a superior anode for high-performance Li-ion and Na-ion batteries

Seed-assisted growth of α-Fe₂O₃ nanorod arrays on reduced graphene oxide: a superior anode for high-performance Li-ion and Na-ion batteries

Some Physical Properties of Ethylene Carbonate-Free Electrolytes

Electrolytes for electrochemical energy storage

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Electrolyte additives for lithium ion battery electrodes: progress and perspectives

Cited by 698 publications

References 302 publications

Seed-assisted growth of α-Fe2O3 nanorod arrays on reduced graphene oxide: a superior anode for high-performance Li-ion and Na-ion batteries

Seed-assisted growth of α-Fe2O3 nanorod arrays on reduced graphene oxide: a superior anode for high-performance Li-ion and Na-ion batteries

Some Physical Properties of Ethylene Carbonate-Free Electrolytes

Electrolytes for electrochemical energy storage

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Product

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Seed-assisted growth of α-Fe₂O₃ nanorod arrays on reduced graphene oxide: a superior anode for high-performance Li-ion and Na-ion batteries

Seed-assisted growth of α-Fe₂O₃ nanorod arrays on reduced graphene oxide: a superior anode for high-performance Li-ion and Na-ion batteries