Alcoholic hydroxyl functionalized partially reduced graphene oxides for symmetric supercapacitors with long-term cycle stability

Zhang, Yong; Wen, Guangwu; Fan, Shanhui; Ma, Wenhui; Li, Shuhua; Wu, Tao; Yu, Zhaochuan; Zhao, Baoru

doi:10.1016/j.electacta.2019.05.021

Cited by 47 publications

(23 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Except for epoxy functional groups, the other oxygen-containing functional groups (carboxyl, carbonyl and hydroxyl) can enhance the wettability of electrode materials and generate abundant pseudocapacitances to enhance their energy density. [15][16][17] However, the low conductivity and high epoxy functional group content of GO severely restrict its application in electrochemical eld. At present, many studies have used high-temperature reduction method to solve this problem, which not only consumes a lot of energy but also causes irreparable damage to the sheet structure of graphene.…”

Section: Introductionmentioning

confidence: 99%

N/O co-enriched graphene hydrogels as high-performance electrodes for aqueous symmetric supercapacitors

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

N/O co-enriched graphene hydrogels as high-performance electrodes for aqueous symmetric supercapacitors

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…From the spectrum of TPA, one can see that peaks at 3397 and 1052 cm −1 are assigned to the stretching vibration (sv) and bending vibration (bv) of COH. The peaks at 2950 and 2850 cm −1 are corresponding to the sv of CH 2 in Tris, 22 and the peak at 2881 cm −1 is belonged to the sv of CH in PA hexatomic ring 23 . In addition, several characteristic peaks are observed at 976 cm −1 , 1283 cm −1 (sv PO), and 1026 cm −1 (sv POC).…”

Section: Resultsmentioning

confidence: 92%

Preparation of phytic acid‐based green intumescent flame retardant and its application in PLA nonwovens

Yang

Wang

Fei

et al. 2021

Polymers for Advanced Techs

View full text Add to dashboard Cite

As a bio‐based and biodegradable textile, poly (lactic acid) (PLA) nonwovens are an important supplement for nature cotton, flax, and silk. This work concentrated on improving the flame retardancy of PLA nonwovens by introducing a novel eco‐friendly flame retardant (TPA), which was synthesized from phytic acid and tris(hydroxymethyl)methyl aminomethane. The structure, composition, and properties of TPA were fully characterized, and the results showed that TPA owned excellent thermal expansion performance. The flame retardancy of PLA nonwovens was efficiently improved by the presence of TPA. For PLA/23%TPA sample, the molten droplet was inhibited and the damaged area was decreased by 71.8%. The LOI value was increased from 18.0% of control PLA to 26.5%, and the peak heat release rate (pHRR) and total heat release rate (THR) were decreased by 30.2% and 29.0%, respectively. Besides, TG analysis confirmed a great char‐forming capability of the treated fabrics with the residue amount increasing from 1.8 to 11.6 wt% at 800°C. TPA released vapor, phosphorus radicals into the gas phase, and also promoted to form a compact char barrier in the condensed phase, which enhanced the carbonization and flame retardancy of PLA nonwovens. To our best knowledge, our work is one of the few studies focused on the flame retardancy of bio‐based PLA nonwovens.

show abstract

“…Weak peaks between 285.4 and 288.5 eV imply the presence of carbonyl or amide groups [ 37 ]. The high-resolution O1s spectra of HNT/C-1:1.5-800 ( Figure 4 d) can be deconvoluted into three peaks at binding energies of 531.2 eV (C=O, carbonyl group), 531.8 eV (C–O, epoxy) and 532.8 eV (C–OH, hydroxyl groups), respectively [ 38 , 39 ]. These functional groups are consistent with the FTIR spectra ( Figure 3 ).…”

Section: Resultsmentioning

confidence: 99%

Preparation and Performance of Porous Carbon Nanocomposite from Renewable Phenolic Resin and Halloysite Nanotube

et al. 2020

View full text Add to dashboard Cite

The growing demand for high performance from supercapacitors has inspired the development of porous nanocomposites using renewable and naturally available materials. In this work, a formaldehyde-free phenolic resin using monosaccharide-based furfural was synthesized to act as the carbon precursor. One dimensional halloysite nanotube (HNT) with high porosity and excellent cation/anion exchange capacity was mixed with the phenol-furfural resin to fabricate carbonaceous nanocomposite HNT/C. Their structure and porosity were characterized. The effects of the halloysite nanotube amount and carbonization temperature on the electrochemical properties of HNT/C were explored. HNT/C exhibited rich porosity, involving a large specific surface area 253 m2·g−1 with a total pore volume of 0.27 cm3·g−1. The electrochemical performance of HNT/C was characterized in the three-electrode system and showed enhanced specific capacitance of 146 F·g−1 at 0.2 A g−1 (68 F·g−1 for pristine carbon) in electrolyte (6 mol·L−1 KOH) and a good rate capability of 62% at 3 A g−1. It also displayed excellent cycle performance with capacitance retention of 98.5% after 500 cycles. The symmetric supercapacitors with HNT/C-1:1.5-800 electrodes were fabricated, exhibiting a high energy density of 20.28 Wh·Kg−1 at a power density of 100 W·Kg−1 in 1 M Na2SO4 electrolyte. The present work provides a feasible method for preparing composite electrode materials with a porous structure from renewable phenol-furfural resin and HNT. The excellent supercapacitance highlights the potential applications of HNT/C in energy storage.

show abstract

Alcoholic hydroxyl functionalized partially reduced graphene oxides for symmetric supercapacitors with long-term cycle stability

Cited by 47 publications

References 49 publications

N/O co-enriched graphene hydrogels as high-performance electrodes for aqueous symmetric supercapacitors

N/O co-enriched graphene hydrogels as high-performance electrodes for aqueous symmetric supercapacitors

Preparation of phytic acid‐based green intumescent flame retardant and its application in PLA nonwovens

Preparation and Performance of Porous Carbon Nanocomposite from Renewable Phenolic Resin and Halloysite Nanotube

Contact Info

Product

Resources

About