Ionic liquid and hybrid ionic liquid/organic electrolytes for high temperature lithium-ion battery application

Plylahan, Nareerat; Kerner, Martin; Lim, Du Hyun; Matic, Aleksandar; Johansson, Patrik

doi:10.1016/j.electacta.2016.08.025

Cited by 80 publications

(51 citation statements)

References 52 publications

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“…After 60 °C, there is a dramatic reduction in discharge capacity observed for both types of separator. The reason behind this reduction in capacity is due to the instability of electrolyte solvents and decomposition of electrolyte salts at >60 °C . The electrochemical stability of PE‐BN/PVDF‐HFP and Celgard 2325 separators with lithium anode is evaluated by measuring the symmetric Li/Li cells galvanostatic stability test at a current density of 0.5 mA cm −2 for 400 h at 25 °C.…”

Section: Resultsmentioning

confidence: 99%

High‐Performance PE‐BN/PVDF‐HFP Bilayer Separator for Lithium‐Ion Batteries

Waqas

Ali

et al. 2018

Adv Materials Inter

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Highly efficient and thermally stable polyethylene‐hexagonal boron nitride/poly(vinylidene fluoride‐hexafluoropropylene) (PE‐BN/PVDF‐HFP) bilayer separator with microporous structure is prepared, for the first time with a wet chemistry method. The incorporation of hexagonal boron nitride particles in PE matrix promotes the interfacial interaction between PE and PVDF‐HFP layers to prevent separation of layers and supresses dendrite growth owing to the strong adsorption energy with polymers, large interactive surface area, and superior mechanical capability. The PVDF‐HFP layer provides additional thermally stable backbone while its inherent hydrophilic property and highly porous structure improve the overall performance of the separator. The bilayer separator owns a high electrolyte uptake of 348% and a thermal shrinkage of 6.6% upon annealing at 140 °C for 1 h. The lithium iron phosphate/lithium cell with the as‐prepared separator owns a high ionic conductivity up to 4.4 × 10−4 S cm−1, and a room‐temperature capacity of 120 mAh g−1 at 2 C with a 95% capacity retention after 500 cycles and a capability of 108 mAh g−1 at 4 C. The PE‐BN/PVDF‐HFP separator is a promising alternative of traditional multilayer separators for high‐performance lithium‐ion batteries.

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Section: Resultsmentioning

confidence: 99%

High‐Performance PE‐BN/PVDF‐HFP Bilayer Separator for Lithium‐Ion Batteries

Waqas

Ali

et al. 2018

Adv Materials Inter

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“…However, in the scientific literature the term "high temperature cycling" mainly refers to cycling at temperatures at 60 or 70 • C, with only a few reports of battery cycling at 80 • C or higher [7][8][9][10][11][12][13][14][15][16][17][18][19][20]. The majority of these studies have been carried out with organic carbonate based electrolytes [7][8][9][10][11][12][13][14][15], but ionic liquid (IL) based electrolytes [16][17][18], solid polymer electrolytes [19], and ternary electrolytes (IL + polymer + Li-salt) [20] have also been explored. The extensive work with traditional carbonate electrolytes has aimed at finding suitable electrolyte additives [7], alternative binders [8], and the failure mechanisms for both the negative [9,10] and positive electrodes [11][12][13] as well as full cells [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, TiO 2 electrodes can be cycled at temperatures as high as 120 • C with an electrolyte composed of 1 M lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) in N-methyl-N-propylpyrrolidinium TFSI (Pyr13TFSI) [16]. It should be mentioned that the previous studies [16][17][18] were carried out in half-cell configurations with Li metal as the anode material. The electrochemical performance of ionic liquid electrolytes at elevated temperature should therefore also be investigated in full cell Li-ion batteries.…”

Section: Introductionmentioning

confidence: 99%

“…Work with IL-based electrolytes has, on the other hand, demonstrated promising cycling stabilities for titanium dioxide, TiO 2 (B), and LiFePO 4 (LFP) half-cells at temperatures as high as 120 • C [16][17][18]. The cycling of LIBs at elevated temperatures such as 80 • C is associated with increased risks as the kinetics of any side reaction are enhanced, which could lead to the initiation of heat-generating exothermic reactions and eventually thermal runaway [21].…”

Section: Introductionmentioning

confidence: 99%

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Towards Li-Ion Batteries Operating at 80 °C: Ionic Liquid versus Conventional Liquid Electrolytes

et al. 2018

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Li-ion battery (LIB) full cells comprised of TiO 2 -nanotube (TiO 2 -nt) and LiFePO 4 (LFP) electrodes and either a conventional organic solvent based liquid electrolyte or an ionic liquid based electrolyte have been cycled at 80 • C. While the cell containing the ionic liquid based electrolyte exhibited good capacity retention and rate capability during 100 cycles, rapid capacity fading was found for the corresponding cell with the organic electrolyte. Results obtained for TiO 2 -nt and LFP half-cells indicate an oxidative degradation of the organic electrolyte at 80 • C. In all, ionic liquid based electrolytes can be used to significantly improve the performance of LIBs operating at 80 • C.

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“…It is well known that the specific energy densities of LIBs are quite high compared to other conventional batteries and SCs, but it certainly needs improvement in terms of power density. To improve LIBs power density, LIBs components, such as anode, cathode, and electrolytes, are deeply investigated and various replacements have been reported elsewhere [48,49]. To date, various electrolytes have been prepared and employed in this aspect.…”

Section: Il-based Electrolytes For Libs Applicationmentioning

confidence: 99%

Ionic Liquid-Based Electrolytes for Energy Storage Devices: A Brief Review on Their Limits and Applications

et al. 2020

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Since the ability of ionic liquid (IL) was demonstrated to act as a solvent or an electrolyte, IL-based electrolytes have been widely used as a potential candidate for renewable energy storage devices, like lithium ion batteries (LIBs) and supercapacitors (SCs). In this review, we aimed to present the state-of-the-art of IL-based electrolytes electrochemical, cycling, and physicochemical properties, which are crucial for LIBs and SCs. ILs can also be regarded as designer solvents to replace the more flammable organic carbonates and improve the green credentials and performance of energy storage devices, especially LIBs and SCs. This review affords an outline of the progress of ILs in energy-related applications and provides essential ideas on the emerging challenges and openings that may motivate the scientific communities to move towards IL-based energy devices. Finally, the challenges in design of the new type of ILs structures for energy and environmental applications are also highlighted.Polymers 2020, 12, 918 2 of 37 and structural stability of the ionic species are extremely crucial and responsible for the efficient outputs in energy storage devices. In the light of this fact, high current (i.e., automotive applications) operating devices are required to have storage devices that have higher power density and faster ion transport properties. Previous studies have suggested that one of the most favorable approaches to simultaneously progress the safety, along with energy and power densities, is the incorporation of ILs into the electrolyte system [11].In past decades, room temperature ionic liquids (RTILs) have been acknowledged with noteworthy attention due to their excellent miscellaneous properties, such as thermal and chemical stability, tunable structure over the wide range of operating temperature, a broad electrochemical stability window, high ionic conductivity in the range of 10 −3 -10 −2 S cm −1 at room temperature, and non-flammability as a potential candidate for EES devices, such as LIBs [12], electric double-layer SCs [13][14][15], proton exchange membrane fuel cells, and solar cells [16][17][18][19]. Using ILs as an alternative to organic electrolytes has the advantage of improving the ions' mobility, as well as eliminating the hazards associated within the organic electrolytes. Additionally, ILs often have comparable zero or negligible vapor pressure at normal temperatures due to their high thermal stability. Because of the above statements, ILs are widely used as solvents or electrolytes for energy storage applications in recent times [7,18,[20][21][22][23][24][25][26][27].Typically, ILs are organic salts, also defined as molten salts, which have a lower melting point (<100 • C) with a wide degree of variation. Moreover, they are comprised of organic cations, such as an pyridinium (PY) [28], imidazolium (Im) [29][30][31][32], pyrrolidinium (PYR) [33][34][35][36], ammonium [37], and sulfonium [38], derivatives joined inorganic or organic anions, such as BF 4 − [39,40], PF 6 − [30], triflate (...

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Ionic liquid and hybrid ionic liquid/organic electrolytes for high temperature lithium-ion battery application

Cited by 80 publications

References 52 publications

High‐Performance PE‐BN/PVDF‐HFP Bilayer Separator for Lithium‐Ion Batteries

High‐Performance PE‐BN/PVDF‐HFP Bilayer Separator for Lithium‐Ion Batteries

Towards Li-Ion Batteries Operating at 80 °C: Ionic Liquid versus Conventional Liquid Electrolytes

Ionic Liquid-Based Electrolytes for Energy Storage Devices: A Brief Review on Their Limits and Applications

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