A voltage control strategy to improve the cycling stability of organic electrode materials: The case of para-dinitrobenzene

Li, Minle; Wang, Qi; Wang, Junxiao; Huang, Liang; Chu, Jun; Gan, Xiaotang; Song, Zhiping

doi:10.1016/j.cej.2022.141114

Cited by 7 publications

(7 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 2(c) shows the EIS data of the cell in charged state at different cycle numbers, which were fitted using a classic equivalent circuit (Table S2). The charge transfer resistance ( R ct ) was 163 Ω at the pristine state, and significantly decreased to 73 Ω after the initial cycle, indicating that the Thn‐CH 3 COO electrode structure was optimized after a discharge‐charge cycle, probably caused by its dissolution‐redeposition behavior [23] . Subsequently, the R ct values gradually increased to 94, 288, and 925 Ω at the 5 th , 20 th , and 50 th cycle, suggesting continuous deterioration of the electrode structure during repeated dissolution‐redeposition processes.…”

Section: Resultsmentioning

confidence: 99%

Thionin as a Bipolar Organic Cathode Material for Aqueous Rechargeable Zinc Batteries

Wang

Gan

et al. 2023

Batteries & Supercaps

Self Cite

View full text Add to dashboard Cite

Organic cathode materials (OCMs) have been widely applied in aqueous rechargeable zinc batteries (ARZBs), but there are still many novel structures to be explored for better electrochemical performance and clearer mechanism. Herein, we have studied an organic biological dye, namely thionin (Thn‐CH3COO), as a bipolar‐type OCM for ARZBs based on its electroactive phenothiazine unit. In the optimal electrolyte of 2 M Zn(CF3SO3)2, Thn‐CH3COO exhibited the lowest solubility and thus the highest cycling stability (94 % capacity retention after 100 cycles), with a reversible capacity of 162 mAh g−1 (the theoretical value is 186 mAh g−1) and a discharge plateau at ∼0.8 V vs. Zn2+/Zn. Various characterization and DFT calculations have revealed that both CH3COO− and CF3SO3− anions and H+ cations participated the p‐type and n‐type reactions, respectively. In brief, the novel structure, competitive performance, and exhaustive mechanism investigation will facilitate the further development of ARZBs based on OCMs.

show abstract

Section: Resultsmentioning

confidence: 99%

Thionin as a Bipolar Organic Cathode Material for Aqueous Rechargeable Zinc Batteries

Wang

Gan

et al. 2023

Batteries & Supercaps

Self Cite

View full text Add to dashboard Cite

show abstract

“…This decomposition is always remarkable for organic electrodes, as the elevated proportion and high surface area of conductive carbon like KB effectively enhance its charge transfer and reaction kinetics. Considering that the cycling stability of OCMs usually has a negative correlation with depth of discharge/charge (due to severer dissolution, particle volume change, and electrode structure deterioration), we attempted to get a more balanced reversible capacity and cycling performance by narrowing the voltage range to 1.4–3.8 V. In this range, another commonly used ether-type electrolyte, i.e., 1 M LiTFSI/DOL–DME, was also applicable and showed advantage to 1 M LiTFSI/G2 electrolyte for all of the three materials (especially for BDAAQ; Figure S5). Therefore, it was used as the optimal electrolyte for the following tests.…”

Section: Results and Discussionmentioning

confidence: 99%

Facile Synthesis of Diazaanthraquinone Dimers as High-Capacity Organic Cathode Materials for Rechargeable Lithium Batteries

Zhang,

Gan,

Huang

et al. 2024

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

Organic cathode materials (OCMs) have tremendous potential to construct sustainable and highly efficient batteries beyond conventional Li-ion batteries. Thereinto, quinone/pyrazine hybrids show significant advantages in material availability, energy density, and cycling stability. Herein, we propose a facile method to synthesize quinone/pyrazine hybrids, i.e., the condensation reaction between orthodiamine and bromoacetyl groups. Based on it, we have successfully synthesized three 1,4-diazaanthraquinone (DAAQ) dimers, including 2,2′-bi(1,4-diazaanthraquinone) (BDAAQ) with an exceptional theoretical capacity of 512 mAh g −1 based on the eightelectron reaction. It can be fully utilized in Li batteries in a wide voltage range of 0.8− 3.8 V, at the cost of inferior cycling stability. In an optimal voltage range of 1.4−3.8 V, BDAAQ exhibits one of the best comprehensive electrochemical performances for small-molecule OCMs, including a high specific capacity of 366 mAh g −1 , an average discharge voltage of 2.26 V, as well as a respectable capacity retention of 59% after 500 cycles. Moreover, the in-depth investigations reveal the redox reaction mechanisms based on C�O and C�N groups as well as the capacity fading mechanisms based on dissolution−redeposition behaviors. In brief, this work provides an instructive synthesis method and mechanism understanding of high-performance OCMs based on a quinone/pyrazine hybrid structure.

show abstract

“…proposed an effective voltage control strategy to improve the cycling stability of p ‐DNB in a voltage window of 2.4–3.8 V, which rendered an enhanced high‐capacity retention of 86% after 100 cycles. [ 47 ] Not limited to alkali‐ion batteries as already shown in our original disclosure, [ 45 ] dinitrobenzenes were further reported by another group as organic cathode materials for Zn‐ion batteries via two successive two‐electron processes with superior specific capacities as high as 402 mAh g −1 . [ 48 ] While a large family of nitroaromatics has been revealed in our initial disclosure, [ 45 ] few nitroaromatics other than DNBs have also been investigated successively by other groups for LIBs.…”

Section: Introductionmentioning

confidence: 81%

Tuning Electrochemical Properties of Nitroaromatic Cathodes by Function‐Oriented Design for Rechargeable Lithium‐Ion Batteries

Liu

Wang

2023

Adv Funct Materials

View full text Add to dashboard Cite

Rechargeable lithium-ion batteries (LIBs) based on organic cathodes are an attractive alternative energy storage technology owing to the low cost and sustainability. Recently, nitro functionality in dinitrobenzenes is successfully demonstrated as an electrochemically reversible high-capacity redox group. In this study, a function-oriented design is employed to further disclose the effects of substituting functional groups and molecular conjugate structures on electrochemical properties of a range of nitroaromatic derivatives as organic cathodes for rechargeable LIBs. In specific, it is revealed that the redox potential of nitroaromatic cathodes can be effectively adjusted by introducing distinct electronically inducible functional groups, while the cyclic life can be significantly prolonged with the introduction of the hydrophilic groups. When constructed with extended π-conjugated structures, the electronic conductivity and electrochemical kinetics of nitroaromatics are increased significantly owing to their various long-range π-π stacking. Moreover, density-functional theory calculations further provide theoretical insights into the distinct electrochemical behaviors of the various nitroaromatics in the molecular level. This is the first study that reveals the influences of substituting groups and conjugated structures on the electrochemical performance of nitroaromatic cathode materials, which enables a functionoriented molecular design of such organic materials and sheds light on their future development.

show abstract

A voltage control strategy to improve the cycling stability of organic electrode materials: The case of para-dinitrobenzene

Cited by 7 publications

References 41 publications

Thionin as a Bipolar Organic Cathode Material for Aqueous Rechargeable Zinc Batteries

Thionin as a Bipolar Organic Cathode Material for Aqueous Rechargeable Zinc Batteries

Facile Synthesis of Diazaanthraquinone Dimers as High-Capacity Organic Cathode Materials for Rechargeable Lithium Batteries

Tuning Electrochemical Properties of Nitroaromatic Cathodes by Function‐Oriented Design for Rechargeable Lithium‐Ion Batteries

Contact Info

Product

Resources

About