Benzoquinone‐ and Naphthoquinone‐Bearing Polymers Synthesized by Ring‐Opening Metathesis Polymerization as Cathode Materials for Lithium‐Ion Batteries

Sun, Pengfei; Yang, Jixing; Xu, Yunhua

doi:10.1002/cssc.201902966

Cited by 33 publications

(27 citation statements)

References 61 publications

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“…[ 18–20 ] Although some organic electrodes achieve high capacity, they suffer from insufficient cycling stability due to the good solubility of organic materials in organic liquid electrolytes. [ 21–26 ] Many strategies have been proposed to address the dissolution, such as hybridization with insoluble materials, [ 27–29 ] polymerization, [ 30–35 ] salinization, [ 36–43 ] and encouraging results were obtained. For example, compositing pillar[5]quinone (P5Q) with insoluble porous carbon (CMK‐3) greatly reduced its dissolution in organic liquid electrolytes as a result of the physical confinement of carbon host, realizing a high capacity of 290 mAh g –1 and capacity retention of 69% after 300 cycles.…”

Section: Introductionmentioning

confidence: 99%

Ultralong Cycle Life Organic Cathode Enabled by Ether‐Based Electrolytes for Sodium‐Ion Batteries

Wang

Bai

et al. 2021

Advanced Energy Materials

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Organic cathode materials have gained substantial attention in sodium‐ion batteries (SIBs) because of their low cost, structure versatility, and environmental friendliness. Nevertheless, the use of organic materials is plagued by the unsatisfactory cycling performance caused by dissolution of organic electrode materials, use of inappropriate electrolytes, and/or poor interfacial compatibility. In this work, an ultralong cycle life of SIBs through coupling an insoluble organic cathode, N, N′‐bis(glycinyl) naphthalene diimide, with ether‐based electrolytes, is realized. A thin and stable inorganic‐rich solid electrolyte interphase is constructed through a prior reduction of salt in the organic solvents in the ether‐based electrolytes, promising fast charge transfer kinetics and stable cycling performance of organic electrodes in SIBs. A superb long cycle life of 70 000 cycles at 10C is demonstrated, which is a new record for organic cathode materials in SIBs. The findings highlight the key role of electrolytes and electrolyte/electrode interfaces in furthering the practical prospects of organic electrodes.

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Section: Introductionmentioning

confidence: 99%

Ultralong Cycle Life Organic Cathode Enabled by Ether‐Based Electrolytes for Sodium‐Ion Batteries

Wang

Bai

et al. 2021

Advanced Energy Materials

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“…Constructing polymers is also deemed as an effective way to enhance the cycling stability of organic electrode materials [ 6,26–29 ] and improved performance has been reported. [ 30–34 ] However, due to the introduction of electron donating groups and redox‐inactive portion, the BQ‐derived polymer electrode materials are often reported with decreased discharge voltages (1.7–2.5 V) or greatly reduced capacity (<300 mAh g −1 ). [ 30–32,35,36 ] Apparently, new molecular structure design strategies are needed to achieve largely enhanced electrochemical performance of BQ‐derived electrode materials in organic liquid electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Rational Molecular Design of Benzoquinone‐Derived Cathode Materials for High‐Performance Lithium‐Ion Batteries

Yang

Xiong

Shi

et al. 2020

Adv Funct Materials

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p-Benzoquinone (BQ) is a promising cathode material for lithium-ion batteries (LIBs) due to its high theoretical specific capacity and voltage. However, it suffers from a serious dissolution problem in organic electrolytes, leading to poor electrochemical performance. Herein, two BQ-derived molecules with a near-plane structure and relative large skeleton: 1,4-bis(p-benzoquinonyl)benzene (BBQB) and 1,3,5-tris(p-benzoquinonyl)benzene (TBQB) are designed and synthesized. They show greatly decreased solubility as a result of strong intermolecular interactions. As cathode materials for LIBs, they exhibit high carbonyl utilizations of 100% with high initial capacities of 367 and 397 mAh g −1 , respectively. Especially, BBQB with better planarity presents remarkably improved cyclability, retaining a high capacity of 306 mAh g −1 after 100 cycles. The cycling stability of BBQB surpasses all reported BQ-derived small molecules and most polymers. This work provides a new molecular structure design strategy to suppress the dissolution of organic electrode materials for achieving high performance rechargeable batteries.

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“…This process is not only complicated and ineffective, but also would often induce some problems, such as unsatisfying electrode morphology and resource waste. Another approach of preparing polymer electrodes is in‐situ polymerization [26,27] . Firstly, monomers are polymerized in situ on the conductive agent (such as graphene) to prepare relatively homogeneous polymer/conductive agent (small amount) composites.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Monomer Molecular Structure for Polymer Electrodes Fabricated through in‐situ Electro‐Polymerization Strategy

et al. 2021

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In‐situ electro‐polymerization of redox‐active monomers has been proved to be a novel and facile strategy to prepare polymer electrodes with superior electrochemical performance. The monomer molecular structure would have a profound impact on electro‐polymerization behavior and thus electrochemical performance. However, this impact is poorly understood and has barely been investigated yet. Herein, three carbazole‐based monomers, 9‐phenylcarbazole (CB), 1,4‐bis(carbazol‐9‐yl)benzene (DCB), and 2,6‐bis(carbazol‐9‐yl)naphthalene (DCN), were applied to study the above issue systematically and achieve excellent long cycle performance. The monomers were rationally designed with different polymerizable sites and solubilities. It was found that a monomer with increased polymerizable sites and decreased solubility brought about enhanced electrochemical performance. This is because poor solubility could enhance utilization of the monomer for polymerization and more polymerizable sites could lead to a stable crosslinked polymer network after electro‐polymerization. DCN with four polymerizable sites and the poorest solubility displayed the best electrochemical performance, which showed stable cycling up to 5000 cycles with high capacity retention of 76.2 % (among the best cycle in the literature). Our work for the first time reveals the relationship between monomer structure and in‐situ electro‐polymerization behavior. This work could shed light on the structure design/optimization of monomers for high‐performance polymer electrodes prepared through in‐situ electro‐polymerization.

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Benzoquinone‐ and Naphthoquinone‐Bearing Polymers Synthesized by Ring‐Opening Metathesis Polymerization as Cathode Materials for Lithium‐Ion Batteries

Abstract: Scheme1.a) Molecular structures of BQ-andNQ-bearingp olymers reported previously.S ynthetic routes to b) DMND and poly(DMND), c) NBE-BQ and poly-(NBE-BQ), and d) NBE-NQ and poly(NBE-NQ). G3 representsG rubbst hird-generation catalyst.

Cited by 33 publications

References 61 publications

Ultralong Cycle Life Organic Cathode Enabled by Ether‐Based Electrolytes for Sodium‐Ion Batteries

Ultralong Cycle Life Organic Cathode Enabled by Ether‐Based Electrolytes for Sodium‐Ion Batteries

Rational Molecular Design of Benzoquinone‐Derived Cathode Materials for High‐Performance Lithium‐Ion Batteries

Optimization of Monomer Molecular Structure for Polymer Electrodes Fabricated through in‐situ Electro‐Polymerization Strategy

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