High capacitive property for supercapacitor using Fe 3+ /Fe 2+ redox couple additive electrolyte

Ren, Lijun; Zhang, Gaini; Yan, Zhe; Kang, Liping; Xu, Hua; Shi, Feng; Lei, Zhibin; Liu, Zong–Huai

doi:10.1016/j.electacta.2017.02.056

Cited by 66 publications

(41 citation statements)

References 51 publications

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“…The above oxidative p-doping reaction takes place in conducting PANI with both cations and anions being involved in the electrochemical redox processes of PANI [ 31 ]. The synergistic effect between PANI nanofibers and redox Fe 2+/3+ ion pair promotes the capacitance and cycling stability of the electrode, which has also been demonstrated recently [ 17 , 18 ]. To further study the electrochemical performance of PANI/Ti electrode in the redox active electrolyte, more CV and GCD tests were conducted.…”

Section: Resultsmentioning

confidence: 68%

“…Plenty of excellent works regarding the electrochemically active electrolyte have been reported. Ren et al reported that the specific capacitance of PANI in its symmetric capacitor was promoted to be 1062 F g −1 at 2 A g −1 by utilizing the redox active electrolyte of 1 M H 2 SO 4 + 0.8 M Fe 3+ /Fe 2+ [ 17 ]. By doping PANI electrode materials with iron ions, an even higher specific capacitance of this conductive polymer was achieved in the electrochemically active electrolyte in previous work [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

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Electrodeposited Polyaniline Nanofibers and MoO3 Nanobelts for High-Performance Asymmetric Supercapacitor with Redox Active Electrolyte

Meng

Xia

et al. 2020

Polymers

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Transition molybdenum oxides (MoO3) and conductive polymer (polyaniline, PANI) nanomaterials were fabricated and asymmetric supercapacitor (ASC) was assembled with MoO3 nanobelts as negative electrode and PANI nanofibers as a positive electrode. Branched PANI nanofibers with a diameter of 100 nm were electrodeposited on Ti mesh substrate and MoO3 nanobelts with width of 30–700 nm were obtained by the hydrothermal reaction method in an autoclave. Redox active electrolyte containing 0.1 M Fe2+/3+ redox couple was adopted in order to enhance the electrochemical performance of the electrode nano-materials. As a result, the PANI electrode shows a great capacitance of 3330 F g−1 at 1 A g−1 in 0.1 M Fe2+/3+/0.5 M H2SO4 electrolyte. The as-assembled ASC achieved a great energy density of 54 Wh kg−1 at power density of 900 W kg−1. In addition, it displayed significant cycle stability and its capacitance even increased to 109% of the original value after 1000 charge–discharge cycles. The superior performance of the capacitors indicates their promising application as energy storage devices.

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Section: Resultsmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Electrodeposited Polyaniline Nanofibers and MoO3 Nanobelts for High-Performance Asymmetric Supercapacitor with Redox Active Electrolyte

Meng

Xia

et al. 2020

Polymers

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“…Therefore, adding redox additives to sulfuric acid aqueous solution is a good way to optimize the electrolyte and improve the performance of SCs. Some typical redox additives contain KI Gao et al, 2018), Na 2 MoO 4 (Xu et al, 2017a), Ce 2 (SO 4 ) 3 (Díaz et al, 2015), Fe 3+ /Fe 2+ (Ren et al, 2017), viologen substances (Sathyamoorthi et al, 2016), 1,4-dihydroxyanthraquinone (Xu et al, 2017b), hydroquinone (HQ) (Pham et al, 2015;Chen and Lin, 2019), and so on.…”

Section: Redox Mediated Aqueous Electrolytesmentioning

confidence: 99%

A Review of Redox Electrolytes for Supercapacitors

et al. 2020

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Supercapacitors (SCs) have attracted widespread attention due to their short charging/discharging time, long cycle life, and good temperature characteristics. Electrolytes have been considered as a key factor affecting the performance of SCs. They largely determine the energy density based on their decomposition voltage and the power density from their ionic conductivity. In recent years, redox electrolytes obtained a growing interest due to an additional redox activity from electrolytes, which offers an increased charge storage capacity in SCs. This article summarizes the latest progress in the research of redox electrolytes, and focuses on their properties, mechanisms, and applications based on different solvent types available. It also proposes potential solutions for how to effectively increase the energy density of the SCs while maintaining their high power and long life.

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“…Thus, ECs based on NCMs as negative electrode (capacitor-type) and CPs/NCMs as positive electrode (battery-type) could be classified within this group. Other devices considered as hybrid supercapacitors used redox active electrolyte such as iodide/iodine, bromide/bromine or Fe 3+ /Fe 2+ (Frackowiak et al, 2014;Ma et al, 2014;Zhong et al, 2015;Ren et al, 2017). Therefore, the faradic contribution comes from both the electrolyte and the electrode material.…”

Section: Hybrid Supercapacitorsmentioning

confidence: 99%

Strategies to Enhance the Performance of Electrochemical Capacitors Based on Carbon Materials

et al. 2019

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The increasing worldwide energy consumption has contributed to both the vast growth of greenhouse emissions from carbon-containing fuels-based sources (coal, petroleum, etc.) and the depletion of the aforementioned sources. Given this scenario, the development of inexpensive and high-performing energy storage devices, which have the least possible environmental impact, is needed. At this point, electrochemical capacitors (ECs) or supercapacitors are a particular alternative or complementary option to batteries and fuel cells (FCs). ECs present high power output and long cycle life, but little power density compared to conventional or Lithium-ion batteries. Therefore, ECs are going to play a pivotal role, not only in portable electronic devices, but also to provide power density in hybrid electric vehicles. Many efforts have been focused on improving the energy output of ECs, although its enhancement keeping the high power density is still the cornerstone of most investigations. Many studies have been conducted toward the development of electrode materials such as metal oxides, conducting polymers or novel carbons. Nevertheless, they have shown important shortcomings to be implemented (i.e., high cost, low electrical conductivity, poor stability, etc.). Recent studies put the spotlight on nitrogen-containing carbon materials as candidates to improve the ECs performance in terms of energy. Optimizing the ECs configuration (asymmetric and hybrid) is another approach reported to tackle the challenge. Additionally, it is important to mention that the design of carbon materials obtained from inexpensive precursors lately attracted the attention of the research community. This review compiles works performed in our research group over the last years. The effect of nitrogen groups present in the carbon network on the capacitance will be reported and the study of asymmetric configuration to enhance de energy density will be discussed, either opening the potential window or by increasing the capacitance. Moreover, a lignin-based ECs will be described as an environmentally friendly approach. Finally, perspective and conceivable research guidelines in order to hurdle the challenges proposed to implement the carbon materials in the field of ECs will be addressed.

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High capacitive property for supercapacitor using Fe 3+ /Fe 2+ redox couple additive electrolyte

Cited by 66 publications

References 51 publications

Electrodeposited Polyaniline Nanofibers and MoO3 Nanobelts for High-Performance Asymmetric Supercapacitor with Redox Active Electrolyte

Electrodeposited Polyaniline Nanofibers and MoO3 Nanobelts for High-Performance Asymmetric Supercapacitor with Redox Active Electrolyte

A Review of Redox Electrolytes for Supercapacitors

Strategies to Enhance the Performance of Electrochemical Capacitors Based on Carbon Materials

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