Preparation and electrochemical property of ionic liquid-attached graphene nanosheets for an application of supercapacitor electrode

2014 ◽  
Vol 119 ◽  
pp. 11-15 ◽  
Author(s):  
Jieun Kim ◽  
Seok Kim
Keyword(s):  
Ionic Liquid ◽  
Electrochemical Property ◽  
Graphene Nanosheets ◽  
Supercapacitor Electrode

Effects of ionic liquid types on the tribological, mechanical, and thermal properties of ionic liquid modified graphene/polyimide shape memory composites

2021 ◽  
pp. 095400832199676
Author(s):  
Yuting Ouyang ◽  
Qiu Zhang ◽  
Xiukun Liu ◽  
Ruan Hong ◽  
Xu Xu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Ionic Liquid ◽  
Composite Materials ◽  
Shape Memory ◽  
Recovery Rate ◽  
Shape Recovery ◽  
Graphene Nanosheets ◽  
Mechanical And Thermal Properties ◽  
Thermal And Mechanical Properties ◽  
Modified Graphene

Different ionic liquid modified graphene nanosheets (IG) were induced into polyimide (PI) to improve the tribological, thermal, and mechanical properties of shape memory IG/PI composites. The results demonstrated that when using 1-aminoethyl-3-methylimidazole bromide to modify graphene nanosheets (IG-1), the laser-driven shape recovery rate of IG-1/PI composites (IGPI-1) reached 73.02%, which was 49.36% higher than that of pure PI. In addition, the IGPI-1 composite materials reached the maximum shape recovery rate within 15 s. Additionally, under dry sliding, the addition of IG can significantly improve the tribological properties of composite materials. IGPI-1 exhibited the best self-lubricating properties. Compared with pure PI, the friction coefficient (0.19) and wear rate (2.62 × 10–5) mm3/Nm) were reduced by 44.1% and 24.2%, respectively, and the T10% of IGPI-1 increased by 32.2°C. The Tg of IGPI-1 reached 256.5°C, which was 8.4°C higher than that of pure PI. In addition, the tensile strength and modulus of IGPI-1 reached 82.3 MPa and 1.18 GPa, which were significantly increased by 33.6% and 29.8%, respectively, compared with pure PI. We hope that this work will be helpful for the preparation of shape memory materials with excellent tribological, thermal, and mechanical properties.

High biocurrent generation in Shewanella-inoculated microbial fuel cells using ionic liquid functionalized graphene nanosheets as an anode

2013 ◽  
Vol 49 (59) ◽  
pp. 6668 ◽  
Author(s):  
Cuie Zhao ◽  
Ying Wang ◽  
Fengjian Shi ◽  
Jianrong Zhang ◽  
Jun-Jie Zhu
Keyword(s):  
Ionic Liquid ◽  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Graphene Nanosheets ◽  
Functionalized Graphene

Ionic liquid functionalized manganese oxide on solar exfoliated graphene as supercapacitor electrode

2019 ◽  
Vol 19 ◽  
pp. 100360 ◽  
Author(s):  
Percy J. Sephra ◽  
Baraneedharan Pari ◽  
Sivakumar Muthusamy ◽  
T. Daniel Thangadurai ◽  
Nehru Kasi
Keyword(s):  
Ionic Liquid ◽  
Manganese Oxide ◽  
Supercapacitor Electrode ◽  
Exfoliated Graphene

Supercapacitive performance of porous graphene nanosheets in bis(trifluoromethylsulfony)imide and bis(fluorosulfonyl)imide ionic liquid electrolytes

2018 ◽  
Vol 22 (7) ◽  
pp. 2197-2203 ◽  
Author(s):  
Bo-Rui Pan ◽  
Sheng-Wei Lee ◽  
Chung-Jen Tseng ◽  
Chien-Liang Chang ◽  
Wu-Ching Hung ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Graphene Nanosheets ◽  
Supercapacitive Performance ◽  
Porous Graphene ◽  
Liquid Electrolytes

A Facile Synthesis of NiFe2O4 with High Specific Capacitance as Supercapacitor Electrode Material

2018 ◽  
Vol 281 ◽  
pp. 854-858
Author(s):  
Xi Cheng Gao ◽  
Jian Qiang Bi ◽  
Wei Li Wang ◽  
Guo Xun Sun ◽  
Xu Xia Hao ◽  
...  
Keyword(s):  
Particle Size ◽  
Specific Capacitance ◽  
Electrochemical Property ◽  
Electrode Materials ◽  
High Specific Capacitance ◽  
Constant Current ◽  
X Ray Diffraction ◽  
Supercapacitor Electrode ◽  
Constant Current Charge ◽  
Supercapacitor Electrode Materials

NiFe2O4 powders were synthesized by a facile hydrothermal method at 180°C followed by a thermal treatment at 300°C. The phase composition and morphology were analyzed by X-ray diffraction (XRD) and scanning electron microscope (SEM). The results showed that the NiFe2O4 powders were well-crystallized, and they possessed a particle size in the range of 50-100 nm. The electrochemical property was characterized via cyclic voltammetry (CV) and constant current charge-discharge method. Encouragingly, the NiFe2O4 powders had an excellent electrochemical property, whose specific capacitance reached 266.84 F/g at the electric current density of 1 A/g due to the small particle size. Compared with other Fe-based metal compound oxides, NiFe2O4 has a better electrochemical performance, which can be widely used in the supercapacitor electrode materials.

Improving the performance of all-solid-state supercapacitors by modifying ionic liquid gel electrolytes with graphene nanosheets prepared by arc-discharge

2014 ◽  
Vol 25 (6) ◽  
pp. 859-864 ◽  
Author(s):  
Min-Jie Shi ◽  
Sheng-Zhong Kou ◽  
Bao-Shou Shen ◽  
Jun-Wei Lang ◽  
Zhi Yang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Solid State ◽  
Arc Discharge ◽  
Graphene Nanosheets ◽  
Gel Electrolytes

scholarly journals Ionic Liquid-Assisted Synthesis of a NiO/CNTs Composite and Its Electrochemical Capacitance

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Yitong Chen ◽  
Xiangjun Lu ◽  
Bo Gao
Keyword(s):  
Ionic Liquid ◽  
Rate Capability ◽  
Chemical Deposition ◽  
Reaction Medium ◽  
High Specific Capacitance ◽  
Supercapacitor Electrode ◽  
Electrochemical Capacitance ◽  
Solid State Method ◽  
Structure Morphology ◽  
Good Rate Capability

A novel solid-state method has been developed for synthesizing nickel oxide (NiO)/carbon nanotubes (CNTs) composite using an ionic liquid (IL, 1-butyl-3-methylimidazolium chloride) as the reaction medium. Ultraviolet-visible (UV-vis) absorbance spectroscopy, infrared spectroscopy (IR), and scanning electron microscopy (SEM) were employed to investigate the structure, morphology, and formation mechanism of the synthesized sample. The results demonstrated that the IL is effective for dispersing CNTs, which allows the tethering of nickel (II) ions onto the surfaces of the CNTs and facilitates the subsequent chemical deposition of NiO to obtain the NiO/CNTs composite. The electrochemical properties of the composite were determined using cyclic voltammetry and galvanostatic charge/discharge measurements in 6 M KOH. Because of its unique structure, the prepared NiO/CNTs electrode exhibited good capacitive behavior and cyclability. The high specific capacitance (521 F g−1) and good rate capability (91% capacity retention at 0.5 A g−1) of the NiO/CNTs composite enable its use as a practical supercapacitor electrode material.

A Comparison of Exfoliation Methods on Microstructure and Electrochemical Performance of Graphene Nanosheets for Supercapacitors

2012 ◽  
Vol 15 (2) ◽  
pp. 97-101 ◽  
Author(s):  
Xinlu Li ◽  
Hongfang Song ◽  
Hao Wang ◽  
Hongyi Li ◽  
Yuxin Zhang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Thermal Expansion ◽  
Microwave Irradiation ◽  
Electrochemical Performance ◽  
Electrochemical Property ◽  
Graphene Nanosheets ◽  
Specific Capacity ◽  
N2 Adsorption ◽  
Transmission Electron ◽  
Galvanostatic Discharge

Graphene nanosheets (GNS) were exfoliated by thermal expansion and microwave irradiation, respectively. The influence of exfoliation methods on GNS’s surface structure and electrochemical property were analyzed. The porosity structure of GNS was measured by N2 adsorption. The N2 adsorption results proved that both the specific surface area and pore volume of the GNS exfoliated by thermal expansion are larger than those by microwave irradiation. And the surface morphology was observed by scanning electron microscopy and transmission electron microscopy. The electrochemical performance of the graphene nanosheets were comparatively tested by cyclic voltammetry and galvanostatic discharge-charge tests. The GNS via thermal expansion exhibited better electrochemical property with the specific capacity of 188 F/g at the current density of 0.1 A/g.

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