Sodium‐Ion Batteries: Twisted Perylene Diimides with Tunable Redox Properties for Organic Sodium‐Ion Batteries (Adv. Energy Mater. 20/2017)

Banda, Harish; Damien, D.; Nagarajan, Kalaivanan; Raj, Ashish; Hariharan, Mahesh; Shaijumon, Manikoth M.

doi:10.1002/aenm.201770112

Cited by 11 publications

(16 citation statements)

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“…Specifically, electron-withdrawing groups (e.g. the halogen groups [41,150,[179][180][181][182], cyano groups [182][183][184], perfluoroalkyl groups [185], sulphonyl groups [186,187], and heteroaromatic ring groups [188][189][190] in Fig. 10a, b) are capable of tuning the lowest unoccupied molecular orbital (LUMO), thus controlling the reduction potential of OEMs because theoretical computations suggest that the redox potential has a linear correlation with the LUMO energy (i.e.…”

Section: Voltage Outputmentioning

confidence: 99%

“…For example, compared with the common atoms in OEMs, halogen groups have relatively high electronegativity, i.e. a higher electron affinity, which will result in an electron-withdrawing effect on the electron cloud of the redox-active centre and decrease the LUMO energy level [182]. As a result, a higher redox potential is necessary for the redox-active centres to donate electrons.…”

Section: Voltage Outputmentioning

confidence: 99%

“…[106]. Copyright 2018, Springer Nature Banda et al [182] also demonstrated that the introduction of two Br-or cyano groups enabled perylene diimide (PDI) to increase the reduction potentials from 2.16 to 2.27 V and 2.61 V versus Na/Na + , respectively. PDI-CN 2 having a higher reduction potential than PDI-Br 2 should be attributed to the higher electronegativity of the cyano group than the Br-group.…”

Section: Voltage Outputmentioning

confidence: 99%

“…A large number of Br-groups can bring about an enhanced structural twist of the PDI-derivative molecule. Such a change in molecular structure can alleviate the increasing electrostatic repulsion inside the molecules and, interestingly, results in control over their discharge potential profile [182]. In the case of the relative position of functional groups, the different positions have an influence on the electron cloud distribution of redox-active centre moieties.…”

Section: Voltage Outputmentioning

confidence: 99%

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Molecular and Morphological Engineering of Organic Electrode Materials for Electrochemical Energy Storage

Liu

Pan

et al. 2022

Electrochem. Energy Rev.

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Organic electrode materials (OEMs) can deliver remarkable battery performance for metal-ion batteries (MIBs) due to their unique molecular versatility, high flexibility, versatile structures, sustainable organic resources, and low environmental costs. Therefore, OEMs are promising, green alternatives to the traditional inorganic electrode materials used in state-of-the-art lithium-ion batteries. Before OEMs can be widely applied, some inherent issues, such as their low intrinsic electronic conductivity, significant solubility in electrolytes, and large volume change, must be addressed. In this review, the potential roles, energy storage mechanisms, existing challenges, and possible solutions to address these challenges by using molecular and morphological engineering are thoroughly summarized and discussed. Molecular engineering, such as grafting electron-withdrawing or electron-donating functional groups, increasing various redox-active sites, extending conductive networks, and increasing the degree of polymerization, can enhance the electrochemical performance, including its specific capacity (such as the voltage output and the charge transfer number), rate capability, and cycling stability. Morphological engineering facilitates the preparation of different dimensional OEMs (including 0D, 1D, 2D, and 3D OEMs) via bottom-up and top-down methods to enhance their electron/ion diffusion kinetics and stabilize their electrode structure. In summary, molecular and morphological engineering can offer practical paths for developing advanced OEMs that can be applied in next-generation rechargeable MIBs. Graphical abstract

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Section: Voltage Outputmentioning

confidence: 99%

Section: Voltage Outputmentioning

confidence: 99%

Section: Voltage Outputmentioning

confidence: 99%

Section: Voltage Outputmentioning

confidence: 99%

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Molecular and Morphological Engineering of Organic Electrode Materials for Electrochemical Energy Storage

Liu

Pan

et al. 2022

Electrochem. Energy Rev.

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“…[3][4][5] Additionally, the significant electron affinity of PI fortifies its utility as a nonfullerene acceptor while exploring fundamental aspects of light-harvesting in artificial donor-acceptor (D-A) systems, [6][7][8] its application in organic bulk heterojunction solar cells 9,10 and incipient energy storage application. [11][12][13] However, PI vitiates its intense fluorescence character upon self-assembly (viz. solidstate) and is inherently triplet deficient.…”

Section: Introductionmentioning

confidence: 99%

Viable access to the triplet excited state in peryleneimide based palladium complex $$^{\S }$$ §

2018

Self Cite

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Triplet excited state in organic chromophores is ubiquitously significant owing to its utility in light harvesting and photovoltaic device applications. Herein, we report the enhancement in the triplet character of an innately triplet deficient peryleneimide chromophore via incorporation of a heavy atom. Palladium incorporated perylenemonoimide (PMI-Pd) was synthesized via oxidative addition of PMI-Br into Pd(0) under inert experimental conditions. The structural sanctity of the PMI-Pd and the model derivative PMI was characterized via single crystal X-ray diffraction and the close-packing was examined employing Hirshfeld surface analysis. The steady-state spectroscopic measurements of PMI-Pd in chloroform reveal an apparent perturbation in the UV-Vis absorption, fluorescence emission and lifetime characteristics. A much higher perturbation is observed in the ultrafast photoexcited processes of PMI-Pd in chloroform as envisaged via nanosecond transient absorption (nTA) measurements. The nTA measurements of PMI-Pd in chloroform reveal a significant enhancement in the triplet character of PMI-Pd as compared to the model derivative PMI. Spin-orbit coupling (SOC) mediated triplet enhancement in PMI-Pd suggest heavy atom incorporation as a viable route for accessing the triplet excited states in triplet deficient aromatic chromophores. SOC mediated triplet enhancement in innately triplet deficient organic chromophores can revive the utility of these materials for novel photovoltaic and energy storage applications.

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Organic Cathode Materials for Sodium‐Ion Batteries: From Fundamental Research to Potential Commercial Application

Zhang

Gao

Liu

et al. 2021

Adv Funct Materials

100

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Organic electroactive compounds hold great potential to act as cathode material for organic sodium-ion batteries (OSIBs) because of their environmental friendliness, sustainability, and high theoretical capacity. Although some organic electrodes have been developed with good performance, their practical application is still obstructed by some inherent drawbacks such as low conductivity and solubility in organic electrolytes. In addition, research on OSIBs has been mainly focused on the performance of electrodes on the material level and neglected the trade-off relationship between the high redox potentials and specific capacities. Almost all organic cathodes used in OSIBs lack the ability to be charged first in half-cells because of the absence of detachable sodium ions, resulting in low attractiveness when assembling full cells with hard carbon as anode. Here, this review presents several existing reaction mechanisms in OSIBs and designs of organic cathode materials. Furthermore, strategies are proposed in order to provide guidelines for improving their performance according to some critical parameters (output voltage, specific capacity, and cycle life) in potential practical OSIBs, and some accounts of organic materials assembled in full cells are summarized. Finally, the challenges and prospects of organic electrodes for OSIBs are also discussed in this review.

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Sodium‐Ion Batteries: Twisted Perylene Diimides with Tunable Redox Properties for Organic Sodium‐Ion Batteries (Adv. Energy Mater. 20/2017)

Cited by 11 publications

References 0 publications

Molecular and Morphological Engineering of Organic Electrode Materials for Electrochemical Energy Storage

Molecular and Morphological Engineering of Organic Electrode Materials for Electrochemical Energy Storage

Viable access to the triplet excited state in peryleneimide based palladium complex $$^{\S }$$ §

Organic Cathode Materials for Sodium‐Ion Batteries: From Fundamental Research to Potential Commercial Application

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