A flexible and free-standing Cl−-doped PPy/rGO film as cathode material for ultrahigh capacity and long-cycling sodium based dual-ion batteries

Duan, Ju; Zou, Degui; Che, Zhennan; Weng, Junying; Ji, Ying; Zhu, Ming‐Jun; Li, Aixiang; Zhou, Pengfei

doi:10.1016/j.carbon.2021.09.006

Cited by 24 publications

(11 citation statements)

References 45 publications

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“…Figure e presents the fitting curves of ln( T / R ct ) vs 1/ T for the DAAQ-COF and DAAQ-COF@CNT. Compared to the high E a of DAAQ-COF (0.14 eV), the as-prepared DAAQ-COF@CNT exhibits a lower E a of 0.07 eV, indicating the facile ion diffusion for the few-layered DAAQ-COF on the surface of CNTs . The above results suggest that structure superiority leads to faster ion diffusion and also has a positive effect on capacity improvement.…”

Section: Results and Discussionmentioning

confidence: 85%

“…It is noticeable that the disappearance of N–H in DAAQ and CO in TFP is accompanied by the emergence of C–N in DAAQ-COF, suggesting that a polycondensation reaction has occurred between DAAQ and TFP . The inherent CO of DAAQ can remain in the DAAQ-COF, which can work as electrochemically active sites. , In comparison with DAAQ-COF, the peaks of CO and C–N in DAAQ-COF@CNT exhibit a red shift owing to the interaction between −COOH on the CNTs and −OH on the DAAQ-COF, which can enhance the electron conduction and promote the redox reaction. , The −COOH on the CNTs almost disappeared in DAAQ-COF@CNT, further illustrating that DAAQ-COF coating can be formed on the surface of CNTs.…”

Section: Results and Discussionmentioning

confidence: 94%

“…The pristine CNT electrode was tested and exhibited small reversible capacity in the voltage range of 0.8–2.8 V (Figure S9). Thus, the capacity of DAAQ-COF@CNT and DAAQ-COF electrodes was calculated based on the weight of the DAAQ-COF. ,, The capacity contribution of CNTs at 0.1 A g –1 can be estimated to be 5.25 mAh g –1 based on their weight percentage (35 wt %) in the DAAQ-COF@CNT composite . Thus, the large reversible capacity of the DAAQ-COF@CNT is mainly from the DAAQ-COF contribution, further indicating that the active sites are fully utilized.…”

Section: Results and Discussionmentioning

confidence: 99%

“…On the other hand, the interaction between the few-layered DAAQ-COF and CNTs can promote electron diffusion. The E a is calculated by Arrhenius plots of ln( T / R ct ) vs 1/ T in eq : , in which R and A represent the gas constant and adjustable variable, respectively. Figure e presents the fitting curves of ln( T / R ct ) vs 1/ T for the DAAQ-COF and DAAQ-COF@CNT.…”

Section: Results and Discussionmentioning

confidence: 99%

“…As shown in Figure g, the value of b for peaks 1, 2, 3, and 4 is 0.72, 0.95, 0.78, and 0.80, respectively, indicating that the majority capacity storage of DAAQ-COF@CNT is contributed by surface pseudocapacitance, which can achieve the full utilization of active sites. Furthermore, the proportion of pseudocapacitance to ion diffusion capacitance in the total capacity storage is calculated by eq : ,, where k 1 and k 2 are constants, and k 1 v and k 2 v 1/2 represent the contribution of pseudocapacitance and ion diffusion capacitance, respectively . As presented in Figure h, with the increase of the scan rate from 0.1 to 0.5 mV s –1 , the contribution of pseudocapacitance can persistently grow from 82.59 to 95.73%.…”

Section: Results and Discussionmentioning

confidence: 99%

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Construction of a Few-Layered COF@CNT Composite as an Ultrahigh Rate Cathode for Low-Cost K-Ion Batteries

Duan

Wang

Zou

et al. 2022

ACS Appl. Mater. Interfaces

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Potassium-ion batteries (PIBs) are attracting great interest for large-scale energy storage owing to the abundant resources and low redox potential of K+/K. However, the large volume changes and slow kinetics caused by the larger ionic radius of K+ for cathode materials remain a critical challenge for PIBs. Herein, we construct few-layered covalent organic frameworks integrated with carboxylated carbon nanotubes (DAAQ-COF@CNT) as cathode materials for PIBs. The synthesized DAAQ-COF@CNT features numerous active sites, a stable conductive framework, and an appropriate surface area with nanopores, which can render high electrical conductivity, shorten the ion/electron diffusion distance, and accelerate K+ diffusion. In consequence, the DAAQ-COF@CNT delivers a high reversible capacity of 157.7 mAh g–1 at 0.1 A g–1, an excellent rate capability of 111.2 mAh g–1 at 1 A g–1, and a long cycling stability of 77.6% capacity retention after 500 cycles at 0.5 A g–1. The integrated characterization of ex situ X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and theoretical simulation discloses that the storage mechanism of DAAQ-COF@CNT is based on the reversible reaction between electroactive CO groups and K+ during two successive steps. This work provides a promising high-performance cathode material for PIBs and encourages the development of new types of covalent organic frameworks for PIBs.

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Section: Results and Discussionmentioning

confidence: 85%

Section: Results and Discussionmentioning

confidence: 94%

Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

See 3 more Smart Citations

Construction of a Few-Layered COF@CNT Composite as an Ultrahigh Rate Cathode for Low-Cost K-Ion Batteries

Duan

Wang

Zou

et al. 2022

ACS Appl. Mater. Interfaces

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Spreading the Landscape of Dual Ion Batteries: from Electrode to Electrolyte

2022

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The working mechanism of a dual-ion battery (DIB) differs from that of a lithium-ion battery (LIB) in that the anions in the electrolyte of the former can be intercalated as well. Researchers have been paying close attention to this device because of its high voltage, low price, and environmental friendliness. However, DIBs are still in their early research stages, and numerous issues need to be addressed and investigated further. Initially, this Review explains how DIBs work in principle and discusses the progress of electrode materials for cathode and anode. Furthermore, since the electrolytes used as the active material, as well as anion, solvent, and additives, have a significant impact on the DIB's capacity and voltage, the current status is also presented in terms of electrolytes, followed by an outlook on confronting the challenges. A comprehensive summary from electrode to electrolyte will guide the development of next-generation DIBs.

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An Ultrahigh‐Capacity Dual‐Ion Battery Based on a Free‐Standing Graphite Paper Cathode and Flower‐Like Heterojunction Anode of Tin Disulfide and Molybdenum Disulfide

Fang,

Zheng,

et al. 2023

ChemSusChem

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Dual‐ion batteries have been considered as a competitive energy storage device. However, owing to the lack of the suitable high‐capacity density and rapid‐charging kinetics electrode materials, designing a cost‐effective and high performance dual‐ion battery is still a great challenge. Herein, an ultrahigh‐capacity dual‐ion battery is constructed based on the SnS2‐MoS2@CNTs heterojunction anode and high crystallinity free‐standing graphite paper serves as cathode. The SnS2‐MoS2@CNTs heterojunction consisted of ultrathin nanosheets is prepared via a facile two‐step hydrothermal method, and shows flower‐like morphology and high crystallinity. Benefiting from the unique design concept, the Graphite paper/SnS2‐MoS2@CNTs dual‐ion battery delivers a high capacity of 274.2 mA h g‐1 at 100 mA g‐1 and keeps an outstanding capacity retention of 95% after 300 cycles under 400 mA g‐1. Even at a high current density of 2 A g‐1, the battery still retains a considerable capacity of 112.3 mA h g‐1. More importantly, the battery shows an extremely low self‐discharge of 0.006% h‐1 after resting for 24 h. The characterization of SEM and XRD further demonstrate the excellent cycling stability and good reversibility. Consequently, this constructed dual‐ion battery could be a promising energy storage device and provide new insight for the design of high‐performance dual‐ion batteries.

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A flexible and free-standing Cl−-doped PPy/rGO film as cathode material for ultrahigh capacity and long-cycling sodium based dual-ion batteries

Cited by 24 publications

References 45 publications

Construction of a Few-Layered COF@CNT Composite as an Ultrahigh Rate Cathode for Low-Cost K-Ion Batteries

Construction of a Few-Layered COF@CNT Composite as an Ultrahigh Rate Cathode for Low-Cost K-Ion Batteries

Spreading the Landscape of Dual Ion Batteries: from Electrode to Electrolyte

An Ultrahigh‐Capacity Dual‐Ion Battery Based on a Free‐Standing Graphite Paper Cathode and Flower‐Like Heterojunction Anode of Tin Disulfide and Molybdenum Disulfide

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