New electrolytes for lithium ion batteries using LiF salt and boron based anion receptors

Li, L.F.; Lee, H.S.; Li, H.; Yang, Xiao‐Qing; Nam, Kyung‐Wan; Yoon, Won‐Sub; McBreen, J.; Huang, Xuejie

doi:10.1016/j.jpowsour.2008.03.016

Cited by 79 publications

(41 citation statements)

References 19 publications

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“…0.3͒. 15 Both the increase in viscosity and the decrease in anion transference number would contribute to the variation in conductivities. Figure 3 shows the XRD patterns of the LiMn 2 O 4 thin film on the Pt substrate.…”

Section: Resultsmentioning

confidence: 99%

High Voltage Stability of Interfacial Reaction at the LiMn[sub 2]O[sub 4] Thin-Film Electrodes/Liquid Electrolytes with Boroxine Compounds

Horino¹,

Tamada²,

Kishimoto³

et al. 2010

J. Electrochem. Soc.

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Liquid electrolytes with boroxine compounds were prepared, and interfacial reactions at the liquid electrolytes/LiMn 2 O 4 thin-film electrodes were investigated. Boroxine compounds, B 3 O 3 ͑OR͒ 3 , with different kinds of substituents ͓R = CH 3 , CH 2 CH 3 , ͑CH 2 ͒ 2 CH 3 , and CH͑CH 3 ͒ 2 ͔ were dissolved in 1 mol kg −1 LiCF 3 SO 3 /ethylene carbonate + EMC ͑1:1 by volume͒. Both cyclic voltammetry and electrical impedance spectroscopy measurements revealed that interfacial resistance depended on the chain length in the substituent of the boroxine compounds, and the resistance decreased with the increase in the chain length. Moreover, the anodic stability of the electrolytes was improved up to 5.0 V ͑vs Li/Li + ͒ on the film electrodes by the addition of tri-isopropoxy boroxine ͓R = CH͑CH 3 ͒ 2 ͔ with a steric structure ͑branched chain substituent͒. These results indicate that mixing boroxine compounds with both appropriate chain length and steric structure can be an effective way to develop advanced liquid electrolytes for high voltage rechargeable lithium ion batteries. © 2010 The Electrochemical Society. ͓DOI: 10.1149/1.3374638͔ All rights reserved. Rechargeable lithium ion batteries have been expected as power sources for hybrid and electric vehicles, and some of them have been commercialized. However, further improvements in the current battery system are strongly demanded at the social end, and one of the most expected properties is the enhancement of energy density to prolong the cruising distance of electric vehicles. In this prospect, increase in battery operating voltage must be a possible way because there are several kinds of 5 V class positive electrode materials such as LiNi 0.5 Mn 1.5 O 4 , 1 LiCoPO 4 , 2 and LiCoMnO 4 . 3One of the drawbacks to realize 5 V class rechargeable lithium ion batteries is to develop advanced electrolytes with a wide potential window, high ionic conductivity, sufficient safety, low cost, etc. Although new kinds of electrolytes, typically ionic liquids 4 and solid electrolytes, 5 have been proposed, several problems such as cost, power density, and large resistance at the interface still remained to put them in practical use.In addition to the developments of the above electrolytes, various boron-based compounds have been studied as a new class of electrolytes. Zhang and Angell discovered the electrolytes with boronbased cosolvent. They showed that the electrolyte obtains an approximately 5 V stability on platinum electrodes and that the electrolyte can work well in both Li/LiMnO 2 and carbon/LiMnO 2 cells at 2.0-4.4 V.6 Barthel et al. proposed new lithium salts with a cherate-type anion of boron. 7,8 Sasaki et al. prepared their derivatives and applied them to a practical lithium ion battery system. 9,10Although the anodic stability of these lithium salts was ca. 4.2 V vs Li/Li + , Xu and Angell discovered lithium bis͑oxalate͒ borate ͑Li-BOB͒, which obtained superior anodic stability up to 4.5 V vs Li/Li + on platinum electrode. 11 The LiBOB obtained other interactiv...

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Section: Resultsmentioning

confidence: 99%

High Voltage Stability of Interfacial Reaction at the LiMn[sub 2]O[sub 4] Thin-Film Electrodes/Liquid Electrolytes with Boroxine Compounds

Horino¹,

Tamada²,

Kishimoto³

et al. 2010

J. Electrochem. Soc.

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“…t Li ? of PEO 10 -LiClO 4 before and after the addition of PZSMS fillers are compared in Table 2 and it can be seen that t Li? of the composite polymer electrolytes can be obviously increased by the addition of PZS microspheres. Another important reason for the increased transference number is the entrapment of ClO 4 -anion by the rigid hybrid structure of PZSMS, similar to what is observed in boron-based systems and additives [24][25][26][27]. The rigid …”

Section: Lithium Ion Transference Numbermentioning

confidence: 87%

Novel PEO-based solid composite polymer electrolytes with inorganic–organic hybrid polyphosphazene microspheres as fillers

et al. 2010

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Novel solid-state composite polymer electrolytes based on poly (ethylene oxide) (PEO) by using LiClO 4 as doping salts and inorganic-organic hybrid poly (cyclotriphosphazene-co-4,4 0 -sulfonyldiphenol) (PZS) microspheres as fillers were prepared. Electrochemical and thermal properties of PEO-based polymer electrolytes incorporated with PZS microspheres were studied. Differential scanning calorimetry (DSC) results showed there was a decrease in the glass transition temperature of the electrolytes and the crystallinity of the samples in the presence of the fillers. Maximum ionic conductivity values of 1.2 9 10 -5 S cm -1 at ambient temperature and 7.5 9 10 -4 S cm -1 at 80°were obtained and lithium ion transference number was 0.29. Compared with traditional ceramic fillers such as SiO 2 , the addition of PZS microspheres increased the ionic conductivity of the electrolytes slightly and led to remarkable enhancement in the lithium ion transference number.

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“…Firstly, the small molecules of B-PEG/LiF as a type of liquid polymer electrolyte were synthesized. The combination of polymer borate ester with LiF has some advantage for preparing ion-selective electrolyte due to the strong affinity of fluorine ion (F-) into boronic structure [24,25]. In order to immobilize B-PEG anions, the B-PEG/LiF was further incorporated into PVA or GO/PVA [26,27].…”

Section: W H Ruanmentioning

confidence: 99%

To immobilize polyethylene glycol-borate ester/lithium fluoride in graphene oxide/poly(vinyl alcohol) for synthesizing new polymer electrolyte membrane of lithium-ion batteries

Huang¹,

Zhang²,

Rong³

et al. 2017

Express Polym. Lett.

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Abstract. Polymer electrolyte membranes (PEMs) are potentially applicable in lithium-ion batteries with high safety, low cost and good performance. Here, to take advantages of ionic conductivity and selectivity of borate ester-functionalized small molecules as well as structural properties of polymer nanocomposite, a strategy of immobilizing as-synthesized polyethylene glycol-borate ester/lithium fluoride (B-PEG/LiF) in graphene oxide/poly(vinyl alcohol) (GO/PVA) to prepare a PEM is put forward. Chemical structure of the PEM is firstly characterized by ), lithium-ion transfer number (~0.49), and thermal (~273°C)/electrochemical (>4 V) stabilities of the PEM can be obtained, and the feasibility of PEMs applied in a lithium-ion battery is also confirmed. It is believed that such PEM is a promising candidate as a new battery separator.

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New electrolytes for lithium ion batteries using LiF salt and boron based anion receptors

Cited by 79 publications

References 19 publications

High Voltage Stability of Interfacial Reaction at the LiMn[sub 2]O[sub 4] Thin-Film Electrodes/Liquid Electrolytes with Boroxine Compounds

High Voltage Stability of Interfacial Reaction at the LiMn[sub 2]O[sub 4] Thin-Film Electrodes/Liquid Electrolytes with Boroxine Compounds

Novel PEO-based solid composite polymer electrolytes with inorganic–organic hybrid polyphosphazene microspheres as fillers

To immobilize polyethylene glycol-borate ester/lithium fluoride in graphene oxide/poly(vinyl alcohol) for synthesizing new polymer electrolyte membrane of lithium-ion batteries

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