Poly(N-vinylcarbazole) as an advanced organic cathode for potassium-ion-based dual-ion battery

Li, Chao; Xue, Jing; Huang, Ao; Ma, Jing; Qing, Fangzhu; Zhou, Aijun; Wang, Zhihong; Wang, Yuehui; Li, Jingze

doi:10.1016/j.electacta.2018.12.021

Cited by 87 publications

(66 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This difference about K‐ion storage contribution is believed to give rise to the increased cycling stability for PTCDA‐0C electrode at 7.35 C. The energy‐power densities and cycling performance of PTCDA‐0C and PTCDA‐2C are truly outstanding. The energy‐power performance of the battery using the PTCDA‐0C cathode is highly competitive with the‐of‐the‐art organic cathode materials for PIBs ( Figure a) . Meanwhile, because of the extraordinary capacity of PTCDA‐2C electrode at ultrahigh current densities, corresponding potassium‐organic battery presents superiority in energy density than many reported inorganic cathodes including Prussian Blue and KVOPO 4 when the power density over 9555 W kg −1 (Figure S5, Supporting Information) .…”

Section: Resultsmentioning

confidence: 96%

Tailored Redox Kinetics, Electronic Structures and Electrode/Electrolyte Interfaces for Fast and High Energy‐Density Potassium‐Organic Battery

Tong

Tian

Wang

et al. 2019

Adv Funct Materials

View full text Add to dashboard Cite

Potassium-organic batteries have a great potential for applications in large-scale electricity grids and electric vehicles because of their low cost and sustainability. However, their inferior cycle stability and more importantly low energy density under fast discharge/charge process of organic cathodes limit their applications. This work introduces a simple polymerization processing which enables comprehensive tuning of redox kinetics, electronic structures, and electrode/electrolyte interfaces of the polymer cathodes. With this approach, a potassium-organic battery with an impressive energy density of 113 Wh kg −1 at a high power of 35.2 kW kg −1 is shown which corresponds to a high current density of 147 C and a fully discharge within 10 s. The battery also has impressive cycling stability that a 100% Columbic efficiency is maintained and shows negligible capacity degradation after 1000 cycle at a high current density of 7.35 C. Using the polymer cathode and a dipotassium terephthalate anode, a full battery with superior energy density and cycling stability is demonstrated among all reported all-organic full potassium ion batteries.

show abstract

Section: Resultsmentioning

confidence: 96%

Tailored Redox Kinetics, Electronic Structures and Electrode/Electrolyte Interfaces for Fast and High Energy‐Density Potassium‐Organic Battery

Tong

Tian

Wang

et al. 2019

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…According to previous studies of carbazole derivatives, the performance of carbazole‐based organic materials as electrode materials is relatively low because of its electrochemical irreversibility, which results in a fast decay of the capacity. To enhance the reversibility, a phenyl‐substituted N atom was introduced in the redox center.…”

Section: Resultsmentioning

confidence: 99%

Dilution of the Electron Density in the π‐Conjugated Skeleton of Organic Cathode Materials Improves the Discharge Voltage

et al. 2020

View full text Add to dashboard Cite

Organic compounds are promising candidates as battery materials because they can be sourced from sustainable resources, have tunable structures, and are cheap. However, the working voltage of battery cells containing organic compounds as positive electrodes is relatively lower than that of those containing an inorganic counterpart. In this work, a strategy was developed to increase the discharge voltage of battery cells by diluting the electron density of N‐based redox centers in conjugated organic materials. In electron‐rich heterocyclic compounds that utilize N as the redox center, pentatomic rings such as carbazole derivatives exhibited a higher atomic‐dipole‐moment‐corrected Hirshfeld charge population compared with hexatomic rings, which led to a significant increase in the oxidation potential. As a result, polymeric indolocarbazole derivatives showed a high discharge voltage of 3.7–4.3 V vs. Li+/Li and good cycling performance. Such a strategy can be used to design high‐voltage organic electrode materials containing other redox centers.

show abstract

“…According to previous studies of carbazole derivatives, [23][24][25] the performance of carbazole-based organic materials as electrode materials is relativelyl ow because of its electrochemical irreversibility,w hich results in af ast decay of the capacity.T oe nhance the reversibility,aphenyl-substitutedNatom was introduced in the redox center.S uch ap lanar p-conjugated structure of carbazole contributed to delocalization of the conjugated p electrons, and the dihedral angle ( % 558)b etween the phenylg roup and the conjugatedp lane improved the charge delocalization and the stability of the Na tom through the conjugate effect. The calculated ADCH charges of typical heterocyclic-ring-based molecules used in organic batteries are shown in Figure 1a.T he ADCH charge represents the ability/strength of an atom to gain or lose electrons.…”

Section: Resultsmentioning

confidence: 99%

Cover Feature: Dilution of the Electron Density in the π‐Conjugated Skeleton of Organic Cathode Materials Improves the Discharge Voltage (ChemSusChem 9/2020)

et al. 2020

View full text Add to dashboard Cite

The Cover Feature shows that the discharge voltage of conjugated organic battery cathode materials could be increased by diluting the electron density in the π‐conjugated skeleton. The background is composed of a positive battery cap and hexagonal organic molecules, indicating organic batteries. The rocket‐like molecules are four representative models used to demonstrate voltage tailoring. The smoke rings represent the diluted electron density of the molecule, and their size is correlated to the degree of dilution. The assembly line in the lower‐right corner shows that ideal molecules could be experimentally designed and synthesized for organic batteries if proper molecular design strategy was applied. More information can be found in the Full Paper by G. Dai, Y. Gao, et al. on page 2264 in Issue 9, 2020 (DOI: 10.1002/cssc.201903502).

show abstract

Poly(N-vinylcarbazole) as an advanced organic cathode for potassium-ion-based dual-ion battery

Cited by 87 publications

References 37 publications

Tailored Redox Kinetics, Electronic Structures and Electrode/Electrolyte Interfaces for Fast and High Energy‐Density Potassium‐Organic Battery

Tailored Redox Kinetics, Electronic Structures and Electrode/Electrolyte Interfaces for Fast and High Energy‐Density Potassium‐Organic Battery

Dilution of the Electron Density in the π‐Conjugated Skeleton of Organic Cathode Materials Improves the Discharge Voltage

Cover Feature: Dilution of the Electron Density in the π‐Conjugated Skeleton of Organic Cathode Materials Improves the Discharge Voltage (ChemSusChem 9/2020)

Contact Info

Product

Resources

About