Organic molecule electrode with high capacitive performance originating from efficient collaboration between caffeic acid and graphene &amp; graphene nanomesh hydrogel

Wang, Xiaotong; Hou, Lei; Chen, Wenlian; Xie, Yandong; Xie, Kefeng; An, Ning; Hu, Zhongai

doi:10.1016/j.electacta.2019.134953

Cited by 22 publications

(21 citation statements)

References 63 publications

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“…Compared to the rGO 1 , the rGO 1 -THBA has an additional relative weight loss of 16.4% at 750 °C. In accordance with previous literature, the content of THBA in the rGO 1 -THBA 1:3 is counted to be about 22.2% …”

Section: Resultssupporting

confidence: 90%

“…In accordance with previous literature, the content of THBA in the rGO 1 -THBA 1:3 is counted to be about 22.2%. 22 The X-ray photoelectron spectroscopy (XPS) for rGO 1 and rGO 1 -THBA 1:3 samples contains both C 1s (283.6 eV) and O 1s (531.7 eV). Compared with the O peak of rGO 1 , the O peak of rGO 1 -TBHA is intensity enhanced, which may be on account of the introduction of THBA molecules on the rGO 1 surface.…”

Section: Resultsmentioning

confidence: 99%

“…The acquired electrode presents a capacitance of 400 F g –1 with an outstanding rate capability . In addition, triethanolamine, 2,5-dimethoxy-1,4-benzoquinone, caffeic acid, hydroquinones, and so forth have been proven to deliver unrivaled performance in capacitance. 4-Aminophenol and alizarin have been found to give high rate capability.…”

Section: Introductionmentioning

confidence: 99%

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Organic Molecule-Functionalized Reduced Graphene Oxide for All-Carbon Asymmetric Supercapacitor Applications

Jiao

et al. 2021

ACS Appl. Energy Mater.

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An organic molecular electrode (OME) is obtained, in which the polyhydric organic molecules (3,4,5-trihydroxybenzamide, THBA) act as a guest molecule to decorate graphene hydrogel (rGO1). The THBA acts as a spacer to prevent the rGO sheet from aggregation and provides an active center for OME. In the three-electrode configuration, the prepared OME (rGO1-THBA) presents a capacitance of 390.6 F g–1 and has a capacitance retention of 73.7% even when the scanning rate increases from 5 to 100 mV s–1. Furthermore, we synthesize an organic molecule 1,4,5,8-naphthalenetetracarboxylic diimide (NDP) and immobilize it onto the rGO surface to form another OME (rGO-NDP) as the counter electrode. An all-carbon asymmetric supercapacitor (rGO1-THBA//rGO-NDP: ASC) is constructed by using rGO1-THBA and rGO-NDP as the positive and negative electrodes, respectively. The resultant device achieves a capacitance of 70.8 F g–1 and delivers an energy density of 14 W h kg–1, supplying the power of 590 W kg–1. More importantly, the two asymmetric devices in series connection are able to light up 24 LED lights for 100 s.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Organic Molecule-Functionalized Reduced Graphene Oxide for All-Carbon Asymmetric Supercapacitor Applications

Jiao

et al. 2021

ACS Appl. Energy Mater.

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“…Peaks at 0.48/0.42 V were observed on bare graphite, attributed to oxygen functional groups on the surface of the graphite sheet. [ 25 ] Hence, peaks at 0.62/0.57 V versus Ag/AgCl at a scan rate of 2 mV s −1 were assigned to the redox reaction of catechol (Figure 2b ). It is worth noting that the redox potential of PTC cathode was higher than previously reported CPs grafted by NQ (0.25 V vs Ag/AgCl) and BQ (0.47 V vs Ag/AgCl).…”

Section: Resultsmentioning

confidence: 99%

Bioinspired Catechol‐Grafting PEDOT Cathode for an All‐Polymer Aqueous Proton Battery with High Voltage and Outstanding Rate Capacity

et al. 2021

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Aqueous all-polymer proton batteries (APPBs) consisting of redox-active polymer electrodes are considered safe and clean renewable energy storage sources. However, there remain formidable challenges for APPBs to withstand a high current rate while maximizing high cell output voltage within a narrow electrochemical window of aqueous electrolytes. Here, a capacitive-type polymer cathode material is designed by grafting poly(3,4-ethylenedioxythiophene) (PEDOT) with bioinspired redox-active catechol pendants, which delivers high redox potential (0.60 V vs Ag/AgCl) and remarkable rate capability. The pseudocapacitive-dominated proton storage mechanism illustrated by the density functional theory (DFT) calculation and electrochemical kinetics analysis is favorable for delivering fast charge/discharge rates. Coupled with a diffusion-type anthraquinone-based polymer anode, the APPB offers a high cell voltage of 0.72 V, outstanding rate capability (64.8% capacity retention from 0.5 to 25 A g −1 ), and cycling stability (80% capacity retention over 1000 cycles at 2 A g −1 ), which is superior to the state-of-the-art all-organic proton batteries. This strategy and insight provided by DFT and ex situ characterizations offer a new perspective on the delicate design of polymer electrode patterns for high-performance APPBs.

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“…The oxidation/reduction conversion of redox sites in redox-active organic molecules is within a certain potential range, which provides the electrochemical basis for organic molecules to be used as pseudocapacitive electrode materials . However, the organic molecules are electrically insulated and partly dissolve in electrolytes during electrochemical operations, resulting in hardly any release of capacitance when used as electrodes alone. , To solve these problems, the researchers design and fabricate organic molecule electrodes (OMEs), − which combine redox organic molecules with highly conductive carbon-based materials. The OMEs can make the components complement each other in the properties and accordingly achieve the high specific capacitance and excellent cycle stability.…”

Section: Introductionmentioning

confidence: 99%

Quinolinediol Molecule Electrode and MXene for Asymmetric Supercapacitors with Efficient Energy Storage

Jiao

Wang

et al. 2021

ACS Appl. Energy Mater.

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Asymmetric supercapacitors (ASCs) need positive and negative electrodes to produce a larger redox peak position difference to achieve a higher energy density. Here, 2,8-quinolinediol (QD) is adopted to modify reduced graphene oxide (rGO) and prepare an organic molecule electrode (OME), in which the Faraday reaction occurs in a more positive potential range. The electrochemical tests show that the optimized OME (QD/rGO-0.75) releases a high special capacitance (371 F g–1 at 5 mV s–1) and exhibits an excellent rate capability (86.8% of the initial value at a scanning rate multiple of nearly 20 times). Meanwhile, an MXene (Ti3C2T x ) with a relatively negative potential is prepared. QD/rGO-0.75 and Ti3C2T x are, respectively, used as positive and negative electrodes to assemble an ASC. The measurements indicate that the assembled ASC is able to store charge within a wide voltage window of 1.6 V in the 1 M H2SO4 electrolyte and exhibit better energy storage performance. Furthermore, the device delivers an excellent cycling stability (83.5%, over 10,000 cycles). The two series-connected devices can light 37 red light-emitting diodes, indicating their potential application.

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Organic molecule electrode with high capacitive performance originating from efficient collaboration between caffeic acid and graphene & graphene nanomesh hydrogel

Cited by 22 publications

References 63 publications

Organic Molecule-Functionalized Reduced Graphene Oxide for All-Carbon Asymmetric Supercapacitor Applications

Organic Molecule-Functionalized Reduced Graphene Oxide for All-Carbon Asymmetric Supercapacitor Applications

Bioinspired Catechol‐Grafting PEDOT Cathode for an All‐Polymer Aqueous Proton Battery with High Voltage and Outstanding Rate Capacity

Quinolinediol Molecule Electrode and MXene for Asymmetric Supercapacitors with Efficient Energy Storage

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