Melamine–terephthalaldehyde–lithium complex: a porous organic network based single ion electrolyte for lithium ion batteries

Rohan, Rupesh; Pareek, Kapil; Cai, Weiwei; Zhang, Yunfeng; Xu, Guodong; Chen, Zhongxin; Gao, Zhiqiang; Zhao, Dan; Cheng, Hansong

doi:10.1039/c4ta06855f

Cited by 48 publications

(38 citation statements)

References 64 publications

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“…Obviously IR spectroscopy is much more sensitive to carbonyl group and thus can be detected even at very low concentrations. Similar observation was also made for such networks by others . The presence of distinct bands corresponding to the quadrant and semicircle stretching of the triazine ring at 1543 and 1474 cm −1 , respectively, confirms the successful incorporation of melamine into SNW through aminal linkages.…”

Section: Resultssupporting

confidence: 87%

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Highly Efficient and Reusable Microporous Schiff Base Network Polymer as a Heterogeneous Catalyst for CuAAC Click Reaction

Taşkın

Dadashi‐Silab

Kışkan

et al. 2015

Macromol. Chem. Phys.

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A microporous Schiff base network (SNW) polymer containing melamine groups is synthesized as a specific metal template material and employed as a solid support to stabilize copper(I) ions. The Cu(I) ions are incorporated into the SNW structure through coordination with the nitrogen atoms present in the melamine groups. The Cu(I)‐incorporated material shows a highly effective catalytic activity for the copper(I)‐catalyzed azide–alkyne cycloaddition (CuAAC) reaction. Several azide and alkyne compounds are used to conduct the click reaction by using a little amount of catalyst and almost quantitative yields are attained. Leaching tests verify the heterogeneity of the catalyst and more importantly, the material shows reusability under the same experimental conditions without any substantial variation in its activity. All results display that the catalyst system is highly competent in view of preparation, stability, selectivity, recovery, and reusability for CuAAC reactions exhibiting potential use in the other copper‐based organic reactions and polymerization processes.

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Section: Resultssupporting

confidence: 87%

“…Several other chemistries such as those involving imine formation, aromatization, and etherification can also be used for the synthesis of MOPs. These chemistries and selected monomers provide a design flexibility that allows a great variety of MOPs with desired functionalities for specific applications …”

Section: Introductionmentioning

confidence: 99%

Highly Efficient and Reusable Microporous Schiff Base Network Polymer as a Heterogeneous Catalyst for CuAAC Click Reaction

Taşkın

Dadashi‐Silab

Kışkan

et al. 2015

Macromol. Chem. Phys.

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“…The high conductivity infers that the two process regulating the ionic conductivity (i. e. i) solvation and dissociation of lithium ions; ii) transportation of the solvated lithium ions by the solvent system) are very effective . In this sense, the morphology of the nanofibers contributes to their excellent solvation characteristics (i. e., very high solvent uptake), and the very high porosity of the nanofabric facilitates the fast transportation of lithium ions , , . The high conductivity value showed herein is particularly relevant considering that, unlike dual‐ion electrolytes in which both cation and anion movements synergistically contribute to the conductivity, SICEs only have one mobile species (i. e., lithium ions) .…”

Section: Resultsmentioning

confidence: 71%

Nanofiber Single‐Ion Conducting Electrolytes: An Approach for High‐Performance Lithium Batteries at Ambient Temperature

et al. 2017

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Exploring the benefits of a nanofibrous morphology in electrolyte materials for Li‐battery applications, an approach of fabricating single‐ion conducting electrolyte (SICE) membranes is reported. A nonwoven nanofabric SICE membrane, delivering an outstanding performance, surpassing the conventional liquid electrolyte system at ambient conditions, was fabricated by using an electrospinning technique. When soaked in a carbonate solvent system, the membrane shows high ionic conductivity, electrochemical stability above 5.2 V (vs. Li/Li+) and a lithium transference number (tnormalLnormali+ ) close to unity (0.93). Moreover, a LiFePO4|Li cell assembled with this membrane performs charge/discharge up to the 5 C rate under ambient conditions with a coulombic efficiency close to 100%. The discharge capacities of this battery are found to be higher than those of a battery assembled with a commercial separator/dual‐ion salt electrolyte system up to 2 C, which offers significant progress for SICEs. Unlike most of the earlier reported SICEs that performed like a bulk‐material entity, the innovative approach might be valuable for future developments.

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“…By designing a 3D porous melamine-terephthalaldehyde-lithium complex (MT-Li) as single lithium-ion conducting electrolytes and then blending with PVDF-HFP, the resulting single lithium-ion conducting GPEs displayed a high ionic conductivity of 6.3 × 10 −4 S cm −1 at room temperature with LTN of 0.86. [75] The high ionic conductivity of the membrane is also attributed to the aromatic triazine ring in the MT-Li complex, which allows the anionic charge to be readily delocalized, and thus promoting the cationic mobility. Similarly, a highly porous single lithium-ion conducting GPEs membrane (47 wt% on the basis of the membrane density) was prepared (Figure 1a www.advenergymat.de extracting polyethylene glycol (PEG) from the membranes by water.…”

Section: Single Lithium-ion Conducting Gpesmentioning

confidence: 99%

Gel Polymer Electrolytes for Electrochemical Energy Storage

Cheng

Pan

Zhao

et al. 2017

Advanced Energy Materials

721

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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Melamine–terephthalaldehyde–lithium complex: a porous organic network based single ion electrolyte for lithium ion batteries

Abstract: Melamine based porous organic frameworks as a single ion conducting electrolyte for lithium ion batteries.

Cited by 48 publications

References 64 publications

Highly Efficient and Reusable Microporous Schiff Base Network Polymer as a Heterogeneous Catalyst for CuAAC Click Reaction

Highly Efficient and Reusable Microporous Schiff Base Network Polymer as a Heterogeneous Catalyst for CuAAC Click Reaction

Nanofiber Single‐Ion Conducting Electrolytes: An Approach for High‐Performance Lithium Batteries at Ambient Temperature

Gel Polymer Electrolytes for Electrochemical Energy Storage

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