Excellent electronic conductivity, insolubility and rate characteristics of DAAP based on chemical bonding with carbon fiber felt

Peng, Huiling; Chen, Pingan; Yang, Xu; Xue, Zhihuan; Wang, Shengping; Na, Jongbeom; Yu, Jingxian; Yamauchi, Yusuke

doi:10.1039/d0ta02689a

Cited by 8 publications

(3 citation statements)

References 28 publications

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“…The superior cycle life and rate capability have exceeded the most reported carbonyl polymer electrodes as compared in Figure 5d and Table S1. [23,28,[46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61] In order to explain the superior cycle stability of PQI@Gr electrodes, the morphological evolution of PQI@Gr-3 after cycling was examined as shown in Figure 5e,f. Despite the interference of conductive carbon and binders, PQI@Gr-3 still keeps a well-defined nanosheet array structure after cycling.…”

Section: Lithium Storage Performancementioning

confidence: 99%

Boosting Lithium Storage in Graphene‐Sandwiched Cathodes Containing Multi‐Carbonyl Polyquinoneimine Nanosheets

Xiao¹,

Xiang

Zhang

et al. 2022

Energy & Environ Materials

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Carbonyl polymers as booming electrode materials for lithium‐organic batteries are currently limited by low practical capacities and poor rate performance due to their inherent electronic insulation and microscopic agglomeration morphologies. Herein graphene/carbonyl‐enriched polyquinoneimine (PQI@Gr) composites were readily prepared by in situ hydrothermal polycondensation of dianhydride and anthraquinone co‐monomer salts in the presence of graphene oxide (GO). Conductive graphene sheets derived from hydrothermal reduction of GO are fully sandwiched between densely interlaced quinone‐containing polyimide nanosheets. Remarkably, the as‐fabricated PQI@Gr cathodes exhibit much larger specific capacity (205 mAh g−1 at 0.1 A g−1), higher carbonyl utilization (up to 89.9%), and better rate capability (179.4 mAh g−1 at 5.0 A g−1) due to a surface‐dominated capacitive process via fast kinetics compared to bare PQI electrode (162.5 mAh g−1 at 0.1 A g−1; 67.5%; 96.9 mAh g−1 at 5 A g−1). The capacity retention as high as 73% for PQI@Gr is also achieved over ultra‐long 10 000 cycles at 5.0 A g−1. Such outstanding electrochemical performances are attributable to the combined merits of polyimides and polyquinones, and robust 3D hierarchical heterostructures with efficient conductive networks, abundant porous channels for electrolyte infiltration and ion accessibility, and highly exposed carbonyl groups. This work offers new insights into the development of high‐performance polymer electrodes for sustainable batteries.

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Section: Lithium Storage Performancementioning

confidence: 99%

Boosting Lithium Storage in Graphene‐Sandwiched Cathodes Containing Multi‐Carbonyl Polyquinoneimine Nanosheets

Xiao¹,

Xiang

Zhang

et al. 2022

Energy & Environ Materials

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“…S13†). In addition, NT exhibits excellent cycling performance of 2500 cycles at 1 A g −1 , reaching a discharge voltage of up to 2.5 V. Moreover, compared with other organic carbonyl cathode materials, NT exhibits a pretty high energy density and cycle life 8,10,31–45 (Fig. 6e, Table S5†).…”

Section: Resultsmentioning

confidence: 96%

Data-driven discovery of carbonyl organic electrode molecules: machine learning and experiment

Du,

Guo,

Sun

et al. 2024

J. Mater. Chem. A

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“…Small molecules can be prepared as corresponding alkali metal salts or extended conjugated structures, while the polymers inhibit dissolution by large molecular weight and conjugate skeletons and improve electronic conductivity by introducing N atoms. The other is combining insoluble conductive substrates by physical effects and stable chemical bonds, such as carbon fiber felt, [ 112 ] CNTs, MXene, graphene, CMK‐3, etc. In addition to the exploration of substrate materials, the electrode fabrication process also merits further study.…”

Section: Discussionmentioning

confidence: 99%

Electrochemical Activity of Nitrogen‐Containing Groups in Organic Electrode Materials and Related Improvement Strategies

Xue

et al. 2021

Advanced Energy Materials

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In recent years, due to their structural diversity, adjustability, versatility, and excellent electrochemical properties, organic compounds with nitrogen‐containing groups (OCNs) have become some of the most promising organic electrode materials. The nitrogen‐containing groups acting as electrochemical active sites include carbon–nitrogen groups, nitrogen–nitrogen groups, nitrogen–oxygen groups in OCNs, and nitrogen‐containing groups in covalent organic frameworks. The molecular structure regulation of OCNs with nitrogen‐containing groups acting as electrochemical active centers can suppress dissolution in electrolytes, increase electronic conductivity, and improve the kinetics of redox reactions. The kinetics behavior and electrochemical characteristics of OCN electrode materials in alkali metal rechargeable batteries with organic electrolytes are reviewed, and the related relationships between the structure and electrochemical properties of OCNs are the core of this review. Herein, the electrochemical reaction mechanisms and the strategies to improve the electrochemical activity of nitrogen‐containing groups in OCNs are clarified, and the conjugate molecular structure of OCNs is shown to be an important direction for improvement. These results will have implications for research on electrode materials and provide more choices for rechargeable batteries. Moreover, this work will guide the study of more efficient OCNs that can be used as electrode materials.

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Excellent electronic conductivity, insolubility and rate characteristics of DAAP based on chemical bonding with carbon fiber felt

Abstract: DAAP@C with stable amide bond (–CO–NH–) between carbon fibers and DAAP molecules has excellent electronic conductivity, insolubility and electrochemical performance. The fatal problems of small molecule carbonyl compounds were solved.

Cited by 8 publications

References 28 publications

Boosting Lithium Storage in Graphene‐Sandwiched Cathodes Containing Multi‐Carbonyl Polyquinoneimine Nanosheets

Boosting Lithium Storage in Graphene‐Sandwiched Cathodes Containing Multi‐Carbonyl Polyquinoneimine Nanosheets

Data-driven discovery of carbonyl organic electrode molecules: machine learning and experiment

Electrochemical Activity of Nitrogen‐Containing Groups in Organic Electrode Materials and Related Improvement Strategies

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