Comparative Investigation of Non-halogenated Imidazolium and Phosphonium-based Surface-Active Ionic Liquids as Electrolyte for Supercapacitors

10.26434/chemrxiv.14459040 ◽

2021 ◽

Author(s):

Preeti Jain ◽

Oleg N. Antzutkin

Keyword(s):

Ionic Liquids ◽

Energy Density ◽

Specific Capacitance ◽

Power Density ◽

High Energy ◽

High Energy Density ◽

Equivalent Series Resistance ◽

Imidazolium Cations ◽

Wide Range ◽

Surface Active

We report a comparative analysis of non-halogenated surface-active ionic liquids (SAILs), which consists of the surface-active anion, 2-ethylhexyl sulfate, and the phosphonium, and imidazolium cations i.e., tetrabutylphosphonium ([P4444]+), trihexyl(tetradecyl)phosphonium ([P66614]+), and 1-methyl-3-hexylimidazolium ([C6C1IM]+). We explored the thermal and electrochemical properties, i.e., degradation, melting and crystallization temperatures, and ionic conductivity of this new class of IL. These SAILs were tested as an electrolyte in a multi-walled carbon nanotubes (MWCNTs)-based supercapacitor at various temperatures from 253 to 373 K. The electrochemical performance of different SAILs by varying the cationic core as a function of temperature were compared, in the same MWCNT-based supercapacitor. We found that the supercapacitor cell with [C6C1IM][EHS] shown high specific capacitance (Celec in F g-1), a high energy density (E in Wh kg-1), and a high power density (P in kW kg-1) when compared to those for the other SAILs i.e. [P4444][EHS], [P66614][EHS], and [N8888][EHS] at all temperatures. The supercapacitor with an MWCNT-based electrode and [C6C1IM][EHS], [P4444][EHS], and [P66614][EHS] as an electrolyte showed a specific capacitance of 148, 90, and 47 F g-1 (at the scan rate of 2 mV s-1) with an energy density of 82, 50, and 26 Wh kg-1 (at 2 mV s-1) respectively, at 298 K. The temperature effect can be seen by the three to four-fold increase in the specific capacitance of the cell and the energy density values, i.e., 290, 198, and 114 F g-1 (at 2 mV s-1) and 161, 110, and 63 Wh kg-1 (at 2 mV s-1), respectively, at 373 K. This study reveals that these new SAILs specifically [C6C1IM][EHS] and [P4444][EHS] can potentially be used as electrolytes in the wide range of temperature. The solution resistance (Rs), charge transfer resistance (Rct), and equivalent series resistance (ESR) also decreased with an increase in temperature for all SAILs as electrolytes. These new SAILs can explicitly be used for high-temperature (wide range of temperature) electrochemical applications, such as efficient supercapacitors for high energy storage due to enhanced specific capacitance, energy, and power density at elevated temperatures.

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Glycerolized Li+ Ion Conducting Chitosan-Based Polymer Electrolyte for Energy Storage EDLC Device Applications with Relatively High Energy Density

Polymers ◽

10.3390/polym12061433 ◽

2020 ◽

Vol 12 (6) ◽

pp. 1433 ◽

Cited By ~ 17

Author(s):

Ahmed S. F. M. Asnawi ◽

Shujahadeen B. Aziz ◽

Muaffaq M. Nofal ◽

Muhamad H. Hamsan ◽

Mohamad A. Brza ◽

...

Keyword(s):

Energy Density ◽

Polymer Electrolyte ◽

Specific Capacitance ◽

Power Density ◽

High Specific Capacitance ◽

High Energy ◽

High Energy Density ◽

Equivalent Series Resistance ◽

Ion Conducting ◽

High Dielectric

In this study, the solution casting method was employed to prepare plasticized polymer electrolytes of chitosan (CS):LiCO2CH3:Glycerol with electrochemical stability (1.8 V). The electrolyte studied in this current work could be established as new materials in the fabrication of EDLC with high specific capacitance and energy density. The system with high dielectric constant was also associated with high DC conductivity (5.19 × 10−4 S/cm). The increase of the amorphous phase upon the addition of glycerol was observed from XRD results. The main charge carrier in the polymer electrolyte was ion as tel (0.044) < tion (0.956). Cyclic voltammetry presented an almost rectangular plot with the absence of a Faradaic peak. Specific capacitance was found to be dependent on the scan rate used. The efficiency of the EDLC was observed to remain constant at 98.8% to 99.5% up to 700 cycles, portraying an excellent cyclability. High values of specific capacitance, energy density, and power density were achieved, such as 132.8 F/g, 18.4 Wh/kg, and 2591 W/kg, respectively. The low equivalent series resistance (ESR) indicated that the EDLC possessed good electrolyte/electrode contact. It was discovered that the power density of the EDLC was affected by ESR.

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β-NiMoO4 nanowire arrays grown on carbon cloth for 3D solid asymmetry supercapacitors

RSC Advances ◽

10.1039/c5ra14704b ◽

2015 ◽

Vol 5 (129) ◽

pp. 107098-107104 ◽

Cited By ~ 19

Author(s):

Chuanshen Wang ◽

Yi Xi ◽

Chenguo Hu ◽

Shuge Dai ◽

Mingjun Wang ◽

...

Keyword(s):

Energy Density ◽

Specific Capacitance ◽

Power Density ◽

High Energy ◽

Nanowire Arrays ◽

High Energy Density ◽

Carbon Cloth ◽

Maximum Power Density ◽

Capacity Retention ◽

3D Solid

A β-NiMoO4 NW supercapacitor lights one LED for 260 s and delivers a large specific capacitance (414.7 F g−1 at 0.25 A g−1), high energy density (36.86 W h kg−1), a maximum power density of 1100 W kg−1 and 65.96% capacity retention after 6000 cycles.

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One-Step Hydrothermal Synthesis of a CoTe@rGO Electrode Material for Supercapacitors

Transactions of Tianjin University ◽

10.1007/s12209-021-00306-7 ◽

2021 ◽

Author(s):

Tianrui Wang ◽

Yupeng Su ◽

Mi Xiao ◽

Meilian Zhao ◽

Tingwu Zhao ◽

...

Keyword(s):

Energy Density ◽

Specific Capacitance ◽

Power Density ◽

Current Density ◽

Electrode Material ◽

High Energy ◽

Cycling Stability ◽

High Energy Density ◽

One Step ◽

Charge Discharge

AbstractCoTe@reduced graphene oxide (CoTe@rGO) electrode materials for supercapacitors were prepared by a one-step hydrothermal method in this paper. Compared with that of pure CoTe, the electrochemical performance of CoTe@rGO was significantly improved. The results showed that the optimal CoTe@rGO electrode material has a remarkably high specific capacitance of 810.6 F/g at a current density of 1 A/g. At 5 A/g, the synthesized material retained 77.2% of its initial capacitance even after 5000 charge/discharge cycles, thereby demonstrating good cycling stability. Moreover, even at a high current density of 20 A/g, the composite electrode retained 79.0% of its specific capacitance at 1 A/g, thus confirming its excellent rate performance. An asymmetric supercapacitor (ASC) with a wider potential window and higher energy density was assembled by using 3 M KOH as the electrolyte, the CoTe@rGO electrode as the positive electrode, and active carbon as the negative electrode. The operating voltage of the supercapacitor could be increased to 1.6 V, and its specific capacitance could reach 112.6 F/g at 1 A/g. The specific capacitance retention rate of the fabricated supercapacitor after 5000 charge/discharge cycles at 5 A/g was 87.1%, which confirms its excellent cycling stability. In addition, the ASC revealed a high energy density of 40.04 W·h/kg at a power density of 799.91 W/kg and a high power density of 4004.93 W/kg at an energy density of 33.43 W·h/kg. These results collectively show that CoTe@rGO materials have broad application prospects.

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Electrochemical, top-down nanostructured pseudocapacitive electrodes for enhanced specific capacitance and cycling efficiency

Nanoscale ◽

10.1039/c7nr08164b ◽

2018 ◽

Vol 10 (8) ◽

pp. 3663-3672 ◽

Cited By ~ 5

Author(s):

Vishwanath Kalyani ◽

Sudeshna Mondal ◽

Jayeeta Saha ◽

Chandramouli Subramaniam

Keyword(s):

Energy Density ◽

Specific Capacitance ◽

Power Density ◽

High Energy ◽

High Energy Density ◽

Top Down ◽

Cycling Efficiency

Electrochemical nanostructuring of MnMoO4 to β-MnO2 on a CNT-scaffold is demonstrated to realize psuedocapacitors with high energy density, power density and lifetime.

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A new O3-type layered oxide cathode with high energy/power density for rechargeable Na batteries

Chemical Communications ◽

10.1039/c4cc09760b ◽

2015 ◽

Vol 51 (22) ◽

pp. 4693-4696 ◽

Cited By ~ 61

Author(s):

Haodong Liu ◽

Jing Xu ◽

Chuze Ma ◽

Ying Shirley Meng

Keyword(s):

Phase Transformation ◽

Energy Density ◽

Cathode Material ◽

Power Density ◽

High Energy ◽

High Energy Density ◽

Rate Performance ◽

Layered Oxide ◽

Oxide Cathode ◽

Wide Range

A new O3–Na0.78Li0.18Ni0.25Mn0.583Ow is prepared as the cathode material for Na-ion batteries, delivering exceptionally high energy density and superior rate performance. No phase transformation happens through a wide range of sodium concentrations.

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Multi-Scale Simulation of High Energy Density Ionic Liquids

10.21236/ada472626 ◽

2007 ◽

Author(s):

Gregory A. Voth

Keyword(s):

Ionic Liquids ◽

Energy Density ◽

High Energy ◽

High Energy Density ◽

Multi Scale

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Na0.76V6O15/Activated Carbon Hybrid Cathode for High-Performance Lithium-Ion Capacitors

Materials ◽

10.3390/ma14010122 ◽

2020 ◽

Vol 14 (1) ◽

pp. 122

Author(s):

Renwei Lu ◽

Xiaolong Ren ◽

Chong Wang ◽

Changzhen Zhan ◽

Ding Nan ◽

...

Keyword(s):

Activated Carbon ◽

Energy Density ◽

Power Density ◽

Cathode Materials ◽

Low Cost ◽

Lithium Ion ◽

High Energy ◽

Cycling Stability ◽

High Energy Density ◽

Artificial Graphite

Lithium-ion hybrid capacitors (LICs) are regarded as one of the most promising next generation energy storage devices. Commercial activated carbon materials with low cost and excellent cycling stability are widely used as cathode materials for LICs, however, their low energy density remains a significant challenge for the practical applications of LICs. Herein, Na0.76V6O15 nanobelts (NaVO) were prepared and combined with commercial activated carbon YP50D to form hybrid cathode materials. Credit to the synergism of its capacitive effect and diffusion-controlled faradaic effect, NaVO/C hybrid cathode displays both superior cyclability and enhanced capacity. LICs were assembled with the as-prepared NaVO/C hybrid cathode and artificial graphite anode which was pre-lithiated. Furthermore, 10-NaVO/C//AG LIC delivers a high energy density of 118.9 Wh kg−1 at a power density of 220.6 W kg−1 and retains 43.7 Wh kg−1 even at a high power density of 21,793.0 W kg−1. The LIC can also maintain long-term cycling stability with capacitance retention of approximately 70% after 5000 cycles at 1 A g−1. Accordingly, hybrid cathodes composed of commercial activated carbon and a small amount of high energy battery-type materials are expected to be a candidate for low-cost advanced LICs with both high energy density and power density.

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Asymmetric supercapacitors with high energy density and high specific capacitance based on Ni-Co-Mn multiphase metal structure MOF

Ionics ◽

10.1007/s11581-021-04056-3 ◽

2021 ◽

Author(s):

Boyuan Zhang ◽

Senyang Song ◽

Wenyue Li ◽

Lewen Zheng ◽

Xiaoyan Ma

Keyword(s):

Energy Density ◽

Specific Capacitance ◽

High Specific Capacitance ◽

Metal Structure ◽

High Energy ◽

High Energy Density ◽

Asymmetric Supercapacitors

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Novel Lithium-Ion Capacitor Based on a NiO-rGO Composite

Materials ◽

10.3390/ma14133586 ◽

2021 ◽

Vol 14 (13) ◽

pp. 3586

Author(s):

Qi An ◽

Xingru Zhao ◽

Shuangfu Suo ◽

Yuzhu Bai

Keyword(s):

Energy Storage ◽

Energy Density ◽

Power Density ◽

High Power ◽

Specific Capacity ◽

Lithium Ion ◽

High Energy ◽

Cycle Life ◽

High Energy Density ◽

Lithium Ion Capacitor

Lithium-ion capacitors (LICs) have been widely explored for energy storage. Nevertheless, achieving good energy density, satisfactory power density, and stable cycle life is still challenging. For this study, we fabricated a novel LIC with a NiO-rGO composite as a negative material and commercial activated carbon (AC) as a positive material for energy storage. The NiO-rGO//AC system utilizes NiO nanoparticles uniformly distributed in rGO to achieve a high specific capacity (with a current density of 0.5 A g−1 and a charge capacity of 945.8 mA h g−1) and uses AC to provide a large specific surface area and adjustable pore structure, thereby achieving excellent electrochemical performance. In detail, the NiO-rGO//AC system (with a mass ratio of 1:3) can achieve a high energy density (98.15 W h kg−1), a high power density (10.94 kW kg−1), and a long cycle life (with 72.1% capacity retention after 10,000 cycles). This study outlines a new option for the manufacture of LIC devices that feature both high energy and high power densities.

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