A study on LiBOB-based nanocomposite gel polymer electrolytes (NCGPE) for Lithium-ion batteries

Aravindan, Vanchiappan; Vickraman, P.

doi:10.1007/s11581-007-0106-y

Cited by 30 publications

(15 citation statements)

References 19 publications

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“…The boron incorporation in this single lithium-ion GPE naturally leads to weak electrostatic interaction of lithium ions with the anions covalently bonded to the polymers, making the Li + more mobile in the polymeric backbones and thus producing high conductivity at low temperature. This type of sp 3 boron in electrolytes as a counter ion of lithium ions includes polymeric lithium tartaric acid borate (PLTB), [67] lithium bis(oxalato) borate, [78] lithium oxalate polyacrylic acid borate, [79] and lithium polyvinyl alcohol oxalate borate. [80] In summary, single lithium-ion conducting GPEs are considered as promising candidates for LIBs and lithium metal batteries to replace the traditional dual-ion conducting GPEs.…”

Section: Single Lithium-ion Conducting Gpesmentioning

confidence: 99%

Gel Polymer Electrolytes for Electrochemical Energy Storage

Cheng

Pan

Zhao

et al. 2017

Advanced Energy Materials

760

562

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storage devices with adjustable shapes and high flexibility, which is promising for the burgeoning portable and wearable electronics. [7][8][9] Furthermore, the flexibility and elasticity of GPEs are also prone to tolerate the volume change of electrode materials and the dendrites of lithium metal during charge and discharge processes. [10][11][12][13] As a consequence, GPEs have become one of the most desirable alternatives among various electrolytes for the electrochemical energy storage devices, and significant progress has been made in lithium-ion batteries (LIBs), supercapacitors (SCs), lithium-oxygen (Li-O 2 ) batteries as well as the other kinds of electrochemical energy storage devices, such as sodium-ion batteries, lithium-sulfur batteries, fuel cells, and zinc-air batteries. [14][15][16] In order to meet the requirements of wearable devices for flexibility and deformability, more special GPEs with tough, [17] stretchable, [18] and compressible [19] functionalities have been also developed.Typically, a polymeric framework is adopted in GPEs as host material, providing high mechanical integrity. Several criteria for a good polymer host lie in: [20][21][22] (i) fast segmental motion of polymer chain; (ii) special groups promoting the dissolution of salts; (iii) low glass transition temperature (T g ); (iv) high molecular weight; (v) wide electrochemical window; (vi) high degradation temperature. Within the framework, the salts in the GPEs serve as the sources of the charge carriers, which are generally required to have large anions and low dissociation energy for easier dissociating-induced free/mobile ions. According to the types of electrolytes, there are four categories of GPEs based on proton, [23] alkaline, [24] conducting salts, and ionic liquids (ILs). [25] The criteria for an appropriate electrolyte include: [26][27][28] (i) good dissociation without forming ion pairs or ion aggregation; (ii) high thermal, chemical, and electrochemical stability; (iii) high ionic conductivity. In order to dissolve both the polymer hosts and electrolytic salts, the organic/ aqueous solvents are introduced to provide the medium for ionic conduction. A good solvent should simultaneously have high dielectric constant (ɛ > 15), donor number for more dissociation of ion and chemical and electrochemical stability. Organic solvents normally include ethylene carbonate (EC), propylene carbonate (PC), diethyl carbonate (DEC), dimethyl carbonate (DMC), dimethyl formamide (DMF), dimethyl sulphoxide, ethyl methyl carbonate, and tetrahydrofuran.To prepare a high-performance GPE, it is essential to select the species of host polymer, solvent, and electrolytic salt, and then blend them by solution or melt processes, such as casting With the booming development of flexible and wearable electronics, their safety issues and operation stabilities have attracted worldwide attentions. Compared with traditional liquid electrolytes, gel polymer electrolytes (GPEs) are preferred due to their higher safety and adaptability to the design of ...

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Section: Single Lithium-ion Conducting Gpesmentioning

confidence: 99%

Gel Polymer Electrolytes for Electrochemical Energy Storage

Cheng

Pan

Zhao

et al. 2017

Advanced Energy Materials

760

562

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“…Due to its low cost, low toxicity, stability, and ease of preparation, lithium bis(oxalato)borate (LiBOB) is currently being evaluated as a suitable salt for use in lithium ion battery technology [10]. Also compared with other Li salts, LiBOB salt has low lattice energy making it more suitable to participate in the formation of polymer electrolytes [10,11]. Ionic transport in polymer electrolyte is, however, not completely understood and remains an obstacle to achieving the required ambient conductivity [12].…”

Section: Introductionmentioning

confidence: 99%

Li+ ion conduction mechanism in poly (ε-caprolactone)-based polymer electrolyte

Aziz

2013

Iran Polym J

148

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In this work, solid polymer electrolytes based on poly(e-caprolactone) (PCL) with lithium bis(oxalato)borate as a doping salt were prepared by solution cast technique using DMF as a solvent. The electrical DC conductivity and dielectric constant of the solid polymer electrolyte samples were investigated by electrochemical impedance spectroscopy over a frequency range from 50 Hz to 1 MHz. It was found that the DC conductivity increased with increase in the salt concentration to up to 4 wt% and thereafter decreased. Dielectric constant versus salt concentration was used to interpret the decrease in DC conductivity with increase in salt concentration. The DC conductivity as a function of temperature follows Arrhenius behavior in low temperature region, which reveals that ion conduction occurs through successful hopping. The curvature of DC conductivity at high temperatures indicates the contribution of segmental motion to ion conduction. High values for dielectric constant and dielectric loss were observed at low frequencies. The plateau of dielectric constant and dielectric loss at high frequencies can be observed as a result of rapid oscillation of the AC electric field. The HN dielectric function was utilized to study the dielectric relaxation. The experimental and theoretical data of dielectric constant are very close to each other at low temperatures. At high temperatures, the simulated data are more deviated from the experimental curve of dielectric constant due to the dominance of electrode polarization. The non-unity of relaxation parameters (a and b) reveals that the relaxation processes in PCL-based solid electrolyte is a non-Debye type of relaxation.

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“…Its decomposition components consist of high toxic and corrosive HF, PF 5 and POF 3 , where HF can dissolve cathode active materials, PF 5 can react with electrolyte solvents and consequently bring about thermal runaway [22][23][24]. In the last few years, a kind of lithium borate salts, for example, lithium bis(oxalato) borate (LiBOB) has attracted great interest to researchers because of superior thermal stability, considerable ionic conductivity and fair dissociation constant [25][26][27]. Furthermore, some kinds of polymer electrolytes based on chelate compound with boron were also reported.…”

Section: Introductionmentioning

confidence: 99%

A single-ion gel polymer electrolyte based on polymeric lithium tartaric acid borate and its superior battery performance

et al. 2014

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A single-ion gel polymer electrolyte of PLTB@PVDF-HFP (polymeric lithium tartaric acid borate@poly(vinylidene fluoride-co-hexafluoropropene)) was prepared and its ionic conductivity was optimized via solvent composition tailoring. It was manifested that the ethylene carbonate/dimethyl carbonate (EC/DMC) swollen PLTB@PVDF-HFP exhibited a superior lithium ionic conductivity at room temperature to that of the traditional liquid electrolyte system (1 M LiPF 6 /EC/DMC). The Li 4 Ti 5 O 12 /LiFePO 4 cells using the EC/DMC swollen PLTB@PVDF-HFP as polymer electrolyte showed stable charge/discharge voltage profiles with small voltage hysteresis, preferable rate capability and excellent cycle performance at room temperature. These superior performances of EC/DMC swollen PLTB@ PVDF-HFP could endow this class of gel polymer electrolyte a very promising alternative to state of the art liquid electrolyte system.

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A study on LiBOB-based nanocomposite gel polymer electrolytes (NCGPE) for Lithium-ion batteries

Cited by 30 publications

References 19 publications

Gel Polymer Electrolytes for Electrochemical Energy Storage

Gel Polymer Electrolytes for Electrochemical Energy Storage

Li+ ion conduction mechanism in poly (ε-caprolactone)-based polymer electrolyte

A single-ion gel polymer electrolyte based on polymeric lithium tartaric acid borate and its superior battery performance

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