Unraveling Three‐Stage Discharging Behaviors of Bio‐Inspired Organic Cathode Materials (Adv. Funct. Mater. 47/2021)

Jung, Ku Hyun; Lim, Sohee; Choi, Siku; Kim, Chul

doi:10.1002/adfm.202170350

Cited by 2 publications

(4 citation statements)

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“…This behavior suggests that the differences in the redox potentials of the dicyanide, quinone, and dithione complexes are due to inductive effects. The first charge carrier generally binds near an electronically rich redox‐active site, primarily because of electrostatic attraction between the electron‐withdrawing active site and electron‐donating charge carrier, leading to the formation of an electron‐deficient region near the bound charge carrier [13b] . After the first charge carrier is bound, electronic localization is greater for the amine‐bridged compounds than for the diamine‐bridged compounds owing to the structural flexibility of the highly mobile amine linkage.…”

Section: Resultsmentioning

confidence: 99%

“…The discharging process of an organic compound can be decomposed into reduction of the compound and subsequent binding of Li to the compound [24] . The reduction process can be further decomposed into electron addition to the compound and electron‐induced reorganization of the compound [13b] . Therefore, the electron affinity describing the energy change during reduction is described by two primary energies: the charging energy and the reorganization energy.…”

Section: Methodsmentioning

confidence: 99%

“…reported that the incorporation of a carbon–carbon triple bond into a pyrenetetrone‐based polymer backbone was important for enhancing the rate performance owing to the beneficial effects of conjugation and planarity [13j] . More recently, redox‐active sites other than carbonyl moieties have been studied to optimize the redox activities of organic compounds [13b,14,15] . Cui et al.…”

Section: Introductionmentioning

confidence: 99%

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Impact of Structural Flexibility of Amine Moieties as Bridges for Redox‐Active Sites on Secondary Battery Performance

Choi

Song

et al. 2023

ChemSusChem

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Although environmentally benign organic cathode materials for secondary batteries are in demand, their high solubility in electrolyte solvents hinders broad applicability. In this study, a bridging fragment to link redox‐active sites is incorporated into organic complexes with the aim of preventing dissolution in electrolyte systems with no significant performance loss. Evaluation of these complexes using an advanced computational approach reveals that the type of redox‐active site (i. e., dicyanide, quinone, or dithione) is a key parameter for determining the intrinsic redox activity of the complexes, with the redox activity decreasing in the order of dithione>quinone>dicyanide. In contrast, the structural integrity is strongly reliant on the bridging style (i. e., amine‐based single linkage or diamine‐based double linkage). In particular, owing to their rigid anchoring effect, diamine‐based double linkages incorporated at dithione sites allow structural integrity to be maintained with no significant decrease in the high thermodynamic performance of dithione sites. These findings provide insights into design directions for insoluble organic cathode materials that can sustain high performance and structural durability during repeated cycling.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impact of Structural Flexibility of Amine Moieties as Bridges for Redox‐Active Sites on Secondary Battery Performance

Choi

Song

et al. 2023

ChemSusChem

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“…Bio‐inspired organic compounds and their potential structural diversity will aid in advancing the development of cathode materials for high‐performance LIBs. [ 393,394 ] In nature, the vertical microchannels in wood are the channels for water transport ( Figure A). [ 62 ] These uniform microchannels permeate the entire wood‐templated cathode.…”

Section: Fast Ion Transport Electrodesmentioning

confidence: 99%

Bio‐Inspired Electrodes with Rational Spatiotemporal Management for Lithium‐Ion Batteries

Song,

Li,

Gao

et al. 2024

Advanced Science

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Lithium‐ion batteries (LIBs) are currently the predominant energy storage power source. However, the urgent issues of enhancing electrochemical performance, prolonging lifetime, preventing thermal runaway‐caused fires, and intelligent application are obstacles to their applications. Herein, bio‐inspired electrodes owning spatiotemporal management of self‐healing, fast ion transport, fire‐extinguishing, thermoresponsive switching, recycling, and flexibility are overviewed comprehensively, showing great promising potentials in practical application due to the significantly enhanced durability and thermal safety of LIBs. Taking advantage of the self‐healing core–shell structures, binders, capsules, or liquid metal alloys, these electrodes can maintain the mechanical integrity during the lithiation–delithiation cycling. After the incorporation of fire‐extinguishing binders, current collectors, or capsules, flame retardants can be released spatiotemporally during thermal runaway to ensure safety. Thermoresponsive switching electrodes are also constructed though adding thermally responsive components, which can rapidly switch LIB off under abnormal conditions and resume their functions quickly when normal operating conditions return. Finally, the challenges of bio‐inspired electrode designs are presented to optimize the spatiotemporal management of LIBs. It is anticipated that the proposed electrodes with spatiotemporal management will not only promote industrial application, but also strengthen the fundamental research of bionics in energy storage.

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Unraveling Three‐Stage Discharging Behaviors of Bio‐Inspired Organic Cathode Materials (Adv. Funct. Mater. 47/2021)

Cited by 2 publications

References 0 publications

Impact of Structural Flexibility of Amine Moieties as Bridges for Redox‐Active Sites on Secondary Battery Performance

Impact of Structural Flexibility of Amine Moieties as Bridges for Redox‐Active Sites on Secondary Battery Performance

Bio‐Inspired Electrodes with Rational Spatiotemporal Management for Lithium‐Ion Batteries

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