Dynamic electrochemical impedance spectroscopy as a rapid screening tool for supercapacitor electrode materials

Ramesh, T.; Vedarajan, Raman; Rajalakshmi, N.; Reddy, L. Ram Gopal

doi:10.1007/s10854-019-02686-y

Cited by 17 publications

(5 citation statements)

References 35 publications

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“…6. Some variations of this circuit include a Warburg diffusion element added in the Zarc element [87], [88], a ZARC element instead of the second CPE [89], [90], and the use of capacitors rather than CPEs in any of the above [91], [92]. Randles circuits are also frequently applied [93]- [95], as is the case with most applications.…”

Section: ) Supercapacitorsmentioning

confidence: 99%

Equivalent Electrical Circuits and Their Use Across Electrochemical Impedance Spectroscopy Application Domains

2022

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When studying electrochemical systems, EIS practitioners face the challenge of choosing a relevant equivalent electrical circuit to analyze their measurement data and interpreting the role of its components. In this review, we take a closer look at the use of equivalent electrical circuits (EEC) across various application domains. We aim to aid EIS practitioners in determining and evaluating their EEC-based data analysis methodology in light of recent progress from all EIS application domains. We review EEC usage and its interpretation while additionally providing software to automatically search for equivalent electrical circuits from the relevant application domain literature that fit EIS measurements supplied by users. Finally, we make a comparison of the impedimetric behaviour and circuit modelling approaches of a range of different electrochemical systems and discuss some complementary EIS data analysis strategies.

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Section: ) Supercapacitorsmentioning

confidence: 99%

Equivalent Electrical Circuits and Their Use Across Electrochemical Impedance Spectroscopy Application Domains

2022

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“…In this context, it must be noted that in the earlier sections, the charge storage was found to be capacitive in nature. A typical double layer capacitor has 90° straight line in the low frequency region [33] i. e., does not have any component behaving as resistor in the low frequency region. Whereas the EIS spectra of PyPBM600 and PyPBM800 show a significant real impedance in the low frequency region too.…”

Section: Resultsmentioning

confidence: 99%

Energy Efficient and Fast Charging Nitrogen Doped Carbon Anodes Derived from BIAN‐melamine Based Porous Organic Polymer for Lithium‐ion Batteries

Mantripragada,

Patnaik,

Higashimine

et al. 2024

Batteries & Supercaps

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Fast charging anodes for lithium‐ion batteries are most sought‐after materials currently, owing to the increasing energy requirements of the world. In this context, carbonaceous materials are found to deliver faster kinetic performance in lithium‐ion batteries. In this study, a single source of carbon and nitrogen was used as a precursor material to synthesize N‐doped carbon (PyPBM600 and PyPBM800). The effect of synthetic conditions on the morphology of the material and in turn on the electrochemical properties is presented. Anodic half‐cells with PyPBM600 and PyPBM800 anodes showed excellent rate capability and capacity till 4 A/g for over 1000 cycles. Furthermore, full cell fabricated with PyPBM800 delivered extremely fast charging characteristics with 15‐minute charging time, a reversible capacity of 1.2 mAh with a columbic efficiency of 99.8% and an enticing voltage and energy efficiencies of 90% for 300 cycles.

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“…(a) (b) Impedance measurements without applied voltage provide limited information on the physicochemical properties of materials and are insufficient to understand the characteristics of electrodes. In addition to conventional electrochemical measurements, this study used an advanced method of dynamic electrochemical impedance spectroscopy (DEIS) [54,55]. Comparative Nyquist plots for supercapacitors based on MXene electrodes with 1, 5, 10, and 20 M LiCl electrolytes obtained using DEIS under charging voltage conditions are shown in Figure 7b-e.…”

Section: Resultsmentioning

confidence: 99%

Effect of LiCl Electrolyte Concentration on Energy Storage of Supercapacitor with Multilayered Ti3C2Tx MXene Electrodes Synthesized by Hydrothermal Etching

Tsyganov,

Shindrov,

Vikulova

et al. 2023

Processes

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The development of new electrode materials for electrochemical systems for various purposes is a significant and in-demand task of scientific research. Layered transition metal carbides and nitrides, known as MXenes, show great potential for use as electrodes in electrochemical energy storage devices operating in aqueous electrolytes. In this work, a multilayer Ti3C2Tx MXene was obtained from a Ti3AlC2 precursor and studied as the electrode material of a symmetrical supercapacitor with an aqueous LiCl electrolyte. The formation of the MXene structure was confirmed by the data from X-ray phase analysis and scanning electron microscopy. The X-ray diffraction pattern showed the disappearance of the main reflections related to the Ti3AlC2 phase and the shift of the reflection peak (002) from 9.4° to 6.7°, which indicated successful etching of the Al layers from the Ti3AlC2 precursor. At electrolyte concentrations of 1, 5, 10, and 20 M, the supercapacitors demonstrated high specific capacitances of 105, 120, 126, and 151 F·g−1 at a scan rate of 5 mV·s−1. In addition, an increase in the LiCl concentration contributed to the expansion of the potential window from 0.7 to 1 V. It was shown that the contribution of the surface capacitance to the total capacitance of the electrode is about 40% and depends little on the scan rate. In addition, the symmetrical supercapacitor with 5 M electrolyte showed good cyclic stability with capacitance retention of 88% over 10,000 cycles. The parameters of the main components of the physical processes of supercapacitors based on Ti3C2Tx were determined by the method of impedance spectroscopy.

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Dynamic electrochemical impedance spectroscopy as a rapid screening tool for supercapacitor electrode materials

Cited by 17 publications

References 35 publications

Equivalent Electrical Circuits and Their Use Across Electrochemical Impedance Spectroscopy Application Domains

Equivalent Electrical Circuits and Their Use Across Electrochemical Impedance Spectroscopy Application Domains

Energy Efficient and Fast Charging Nitrogen Doped Carbon Anodes Derived from BIAN‐melamine Based Porous Organic Polymer for Lithium‐ion Batteries

Effect of LiCl Electrolyte Concentration on Energy Storage of Supercapacitor with Multilayered Ti3C2Tx MXene Electrodes Synthesized by Hydrothermal Etching

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