scholarly journals Realizing high performance flexible supercapacitors by electrode modification

RSC Advances ◽  
2021 ◽  
Vol 11 (62) ◽  
pp. 39045-39050
Author(s):  
Tong Xia ◽  
Depeng Zhao ◽  
Qing Xia ◽  
Ahmad Umar ◽  
Xiang Wu
Keyword(s):  
Energy Density ◽  
Hydrothermal Method ◽  
High Performance ◽  
Electrode Modification ◽  
Electrodeposition Process ◽  
Flexible Supercapacitors ◽  
Asymmetric Device

We prepare hybrid structured NiCo2S4@PPy nanoarchitectures by a hydrothermal method and subsequent electrodeposition process. The assembled asymmetric device presents an energy density of 59.59 W h kg−1 at 1404.04 W kg−1.

An all-solid-state asymmetric device based on a polyaniline hydrogel for a high energy flexible supercapacitor

2017 ◽  
Vol 41 (1) ◽  
pp. 237-244 ◽  
Author(s):  
Hamid Heydari ◽  
Mohammad B. Gholivand
Keyword(s):  
Solid State ◽  
Energy Density ◽  
High Performance ◽  
High Energy ◽  
Gel Electrolyte ◽  
Asymmetric Supercapacitor ◽  
Flexible Supercapacitor ◽  
Asymmetric Device

3D porous PANI hydrogel and a gel electrolyte were used to fabricate a high performance, all-solid-state, flexible asymmetric supercapacitor with an energy density of up to 6.16 mW h cm−3.

A super-thermostable, flexible supercapacitor for ultralight and high performance devices

2020 ◽  
Vol 8 (2) ◽  
pp. 532-542 ◽  
Author(s):  
Dong Won Kim ◽  
Sung Mi Jung ◽  
Hyun Young Jung
Keyword(s):  
High Temperature ◽  
Energy Density ◽  
Polymer Composite ◽  
High Performance ◽  
Composite Electrolytes ◽  
Graphene Aerogel ◽  
High Capacitance ◽  
Flexible Supercapacitor ◽  
Flexible Supercapacitors ◽  
High Temperature Operation

High-temperature operation and flexible supercapacitors are designed from graphene aerogel electrodes and IL-FSN based polymer composite electrolytes, achieving a high capacitance of 1007 F g−1 and an energy density of 1134 Wh kg−1 at 200 °C.

A high-performance graphene based asymmetric supercapacitor

2019 ◽  
Vol 34 (01n03) ◽  
pp. 2040007
Author(s):  
Syeda Wishal Bokhari ◽  
Ahmad Hassan Siddique ◽  
Harshpreet Singh ◽  
Muhammad Dilawer Hayat ◽  
Shenmin Zhu ◽  
...  
Keyword(s):  
Energy Density ◽  
Electrochemical Performance ◽  
Power Density ◽  
High Performance ◽  
Hybrid Nanocomposites ◽  
Asymmetric Supercapacitor ◽  
Galvanostatic Charge ◽  
Asymmetric Device ◽  
Charge Discharge

We present the design of a high-performance 2 V asymmetric supercapacitor made of graphene-based hybrid nanocomposites in 1 M KOH electrolyte. rGO-CNT-FeOOH (GC-F) was used as the cathode and rGO-CNC-MnO2 (GC-M) as the anode. Both composites well balanced each other in the asymmetric device and gave a high electrochemical performance. The energy density of this ASC is 66.6 W h kg[Formula: see text] at 3.8 kW kg[Formula: see text] power density with an excellent capacitance retention of 88% after 3000 galvanostatic charge-discharge cycles.

scholarly journals One step synthesis of Ni/Ni(OH)2 nano sheets (NSs) and their application in asymmetric supercapacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (10) ◽  
pp. 5898-5911 ◽  
Author(s):  
Sivasankara Rao Ede ◽  
S. Anantharaj ◽  
K. T. Kumaran ◽  
Soumyaranjan Mishra ◽  
Subrata Kundu
Keyword(s):  
Energy Density ◽  
Specific Capacitance ◽  
Hydrothermal Method ◽  
Maximum Energy ◽  
Reducing Agent ◽  
Asymmetric Supercapacitors ◽  
Facile Hydrothermal Method ◽  
One Step ◽  
Asymmetric Device

Ni/Ni(OH)2 NSs were prepared by a facile hydrothermal method using EtOH as reducing agent. Asymmetric device is fabricated using AC and Ni/Ni(OH)2 NSs as electrodes, with optimized specific capacitance of 62 F g−1 and a maximum energy density of 23.45 W h kg−1.

δ-MnO2nanofiber/single-walled carbon nanotube hybrid film for all-solid-state flexible supercapacitors with high performance

2017 ◽  
Vol 5 (36) ◽  
pp. 19107-19115 ◽  
Author(s):  
Lu Wang ◽  
Miaomiao Huang ◽  
Shuangbao Chen ◽  
Liping Kang ◽  
Xuexia He ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Solid State ◽  
Energy Density ◽  
Power Density ◽  
High Performance ◽  
Hybrid Film ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Flexible Supercapacitors

A highly flexible symmetrical supercapacitor based on a δ-MnO2nanofiber/SWCNT hybrid film showed an energy density of 31.8 μW h cm−2at a power density of 0.815 mW cm−2.

Efficient Co-Harvesting of Solar Energy and Low-Grade Heat by Molecular Photoswitches for High Energy Density, Long-Term Stable Solar Thermal Battery

2019 ◽  
Author(s):  
Zhao-Yang Zhang ◽  
Tao LI
Keyword(s):  
Energy Density ◽  
Solar Energy ◽  
High Performance ◽  
High Energy ◽  
Solar Thermal ◽  
High Energy Density ◽  
Low Grade ◽  
Thermal Battery ◽  
Low Grade Heat

Solar energy and ambient heat are two inexhaustible energy sources for addressing the global challenge of energy and sustainability. Solar thermal battery based on molecular switches that can store solar energy and release it as heat has recently attracted great interest, but its development is severely limited by both low energy density and short storage stability. On the other hand, the efficient recovery and upgrading of low-grade heat, especially that of the ambient heat, has been a great challenge. Here we report that solar energy and ambient heat can be simultaneously harvested and stored, which is enabled by room-temperature photochemical crystal-to-liquid transitions of small-molecule photoswitches. The two forms of energy are released together to produce high-temperature heat during the reverse photochemical phase change. This strategy, combined with molecular design, provides high energy density of 320-370 J/g and long-term storage stability (half-life of about 3 months). On this basis, we fabricate high-performance, flexible film devices of solar thermal battery, which can be readily recharged at room temperature with good cycling ability, show fast rate of heat release, and produce high-temperature heat that is >20<sup> o</sup>C higher than the ambient temperature. Our work opens up a new avenue to harvest ambient heat, and demonstrate a feasible strategy to develop high-performance solar thermal battery.

Efficient Co-Harvesting of Solar Energy and Low-Grade Heat by Molecular Photoswitches for High Energy Density, Long-Term Stable Solar Thermal Battery

2019 ◽  
Author(s):  
Zhao-Yang Zhang ◽  
Tao LI
Keyword(s):  
Energy Density ◽  
Solar Energy ◽  
High Performance ◽  
High Energy ◽  
Solar Thermal ◽  
High Energy Density ◽  
Low Grade ◽  
Thermal Battery ◽  
Low Grade Heat

Solar energy and ambient heat are two inexhaustible energy sources for addressing the global challenge of energy and sustainability. Solar thermal battery based on molecular switches that can store solar energy and release it as heat has recently attracted great interest, but its development is severely limited by both low energy density and short storage stability. On the other hand, the efficient recovery and upgrading of low-grade heat, especially that of the ambient heat, has been a great challenge. Here we report that solar energy and ambient heat can be simultaneously harvested and stored, which is enabled by room-temperature photochemical crystal-to-liquid transitions of small-molecule photoswitches. The two forms of energy are released together to produce high-temperature heat during the reverse photochemical phase change. This strategy, combined with molecular design, provides high energy density of 320-370 J/g and long-term storage stability (half-life of about 3 months). On this basis, we fabricate high-performance, flexible film devices of solar thermal battery, which can be readily recharged at room temperature with good cycling ability, show fast rate of heat release, and produce high-temperature heat that is >20<sup> o</sup>C higher than the ambient temperature. Our work opens up a new avenue to harvest ambient heat, and demonstrate a feasible strategy to develop high-performance solar thermal battery.

scholarly journals Recent Advances in the Synthesis of Polymer-Grafted Low-K and High-K Nanoparticles for Dielectric and Electronic Applications

Molecules ◽  
2021 ◽  
Vol 26 (10) ◽  
pp. 2942
Author(s):  
Bhausaheb V. Tawade ◽  
Ikeoluwa E. Apata ◽  
Nihar Pradhan ◽  
Alamgir Karim ◽  
Dharmaraj Raghavan
Keyword(s):  
Energy Density ◽  
Polymer Nanocomposites ◽  
High Performance ◽  
Breakdown Strength ◽  
Polymer Nanocomposite ◽  
High Energy ◽  
Polymer Chains ◽  
High Energy Density ◽  
Grafted Nanoparticles ◽  
Grafting From

The synthesis of polymer-grafted nanoparticles (PGNPs) or hairy nanoparticles (HNPs) by tethering of polymer chains to the surface of nanoparticles is an important technique to obtain nanostructured hybrid materials that have been widely used in the formulation of advanced polymer nanocomposites. Ceramic-based polymer nanocomposites integrate key attributes of polymer and ceramic nanomaterial to improve the dielectric properties such as breakdown strength, energy density and dielectric loss. This review describes the ”grafting from” and ”grafting to” approaches commonly adopted to graft polymer chains on NPs pertaining to nano-dielectrics. The article also covers various surface initiated controlled radical polymerization techniques, along with templated approaches for grafting of polymer chains onto SiO2, TiO2, BaTiO3, and Al2O3 nanomaterials. As a look towards applications, an outlook on high-performance polymer nanocomposite capacitors for the design of high energy density pulsed power thin-film capacitors is also presented.

Nacre-inspired composite films with high mechanical strength constructed from MXenes and wood-inspired hydrothermal cellulose-based nanofibers for high performance flexible supercapacitors

Nanoscale ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 3079-3091
Author(s):  
Libo Chang ◽  
Zhiyuan Peng ◽  
Tong Zhang ◽  
Chuying Yu ◽  
Wenbin Zhong
Keyword(s):  
Mechanical Strength ◽  
High Performance ◽  
Composite Films ◽  
High Mechanical Strength ◽  
Flexible Supercapacitor ◽  
Flexible Supercapacitors

Wood-inspired HCNF@Lig introduced into MXenes constructing a nacre-like material with high mechanical strength and excellent flexibility used as a flexible supercapacitor.

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