scholarly journals Ultra-thin NiS nanosheets as advanced electrode for high energy density supercapacitors

RSC Advances ◽  
2020 ◽  
Vol 10 (15) ◽  
pp. 8760-8765 ◽  
Author(s):  
Hailong Yan ◽  
Kejia Zhu ◽  
Xu Liu ◽  
Yinghui Wang ◽  
Yangbo Wang ◽  
...  
Keyword(s):  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
High Capacitance

The NiS electrodes show an ultra-high capacitance of 2587.4 F g−1 and a high energy density of 38.2 W h kg−1.

In situ encapsulation of Co3O4 polyhedra in graphene sheets for high-capacitance supercapacitors

2019 ◽  
Vol 48 (17) ◽  
pp. 5773-5778 ◽  
Author(s):  
Guanyu Lin ◽  
Yulin Jiang ◽  
Chengen He ◽  
Zhiyong Huang ◽  
Xiaofang Zhang ◽  
...  
Keyword(s):  
Energy Density ◽  
High Energy ◽  
Cycling Stability ◽  
High Energy Density ◽  
Graphene Sheets ◽  
Conductive Network ◽  
High Capacitance ◽  
Excellent Cycling Stability ◽  
Large Capacitance

The graphene encapsulated Co3O4 polyhedra (rGO/Co3O4) exhibited large capacitance, high energy density, and excellent cycling stability, due to the 3D double conductive network from graphene sheets and porous channels of Co3O4 polyhedra/N-doped carbon hybrid.

Triple perovskite oxide as an advanced pseudocapacitive material: multifarious element approach with an ordered structure

2020 ◽  
Vol 8 (45) ◽  
pp. 24013-24023
Author(s):  
Anuj Kumar Tomar ◽  
Akanksha Joshi ◽  
Gurmeet Singh ◽  
Raj Kishore Sharma
Keyword(s):  
Energy Density ◽  
High Energy ◽  
Perovskite Oxide ◽  
High Energy Density ◽  
Ordered Structure ◽  
High Capacitance ◽  
Large Potential ◽  
Element Approach

High capacitance and large potential window are prerequisites for high energy density aqueous supercapacitors.

scholarly journals Facile synthesis of novel CuCo2S4 nanospheres for coaxial fiber supercapacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (48) ◽  
pp. 29933-29937 ◽  
Author(s):  
Qiufan Wang ◽  
Xiao Liang ◽  
Depeng Yang ◽  
Daohong Zhang
Keyword(s):  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
Cycle Stability ◽  
Facile Synthesis ◽  
High Capacitance

A flexible coaxial supercapacitor was designed using CuCo2S4 nanospheres on Ti wire, which exhibit satisfactory performances with high capacitance, excellent cycle stability and high energy density.

scholarly journals Rescaling of metal oxide nanocrystals for energy storage having high capacitance and energy density with robust cycle life

2015 ◽  
Vol 112 (26) ◽  
pp. 7914-7919 ◽  
Author(s):  
Hyung Mo Jeong ◽  
Kyung Min Choi ◽  
Tao Cheng ◽  
Dong Ki Lee ◽  
Renjia Zhou ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Metal Oxide ◽  
High Performance ◽  
Negative Electrode ◽  
High Energy ◽  
Maximum Energy ◽  
High Energy Density ◽  
High Capacitance ◽  
Dynamics Simulations

Nanocrystals are promising structures, but they are too large for achieving maximum energy storage performance. We show that rescaling 3-nm particles through lithiation followed by delithiation leads to high-performance energy storage by realizing high capacitance close to the theoretical capacitance available via ion-to-atom redox reactions. Reactive force-field (ReaxFF) molecular dynamics simulations support the conclusion that Li atoms react with nickel oxide nanocrystals (NiO-n) to form lithiated core–shell structures (Ni:Li2O), whereas subsequent delithiation causes Ni:Li2O to form atomic clusters of NiO-a. This is consistent with in situ X-ray photoelectron and optical spectroscopy results showing that Ni2+ of the nanocrystal changes during lithiation–delithiation through Ni0 and back to Ni2+. These processes are also demonstrated to provide a generic route to rescale another metal oxide. Furthermore, assembling NiO-a into the positive electrode of an asymmetric device enables extraction of full capacitance for a counter negative electrode, giving high energy density in addition to robust capacitance retention over 100,000 cycles.

Fabrication of hollow nanorod electrodes based on RuO2//Fe2O3 for an asymmetric supercapacitor

2018 ◽  
Vol 47 (23) ◽  
pp. 7747-7753 ◽  
Author(s):  
Qiufan Wang ◽  
Xiao Liang ◽  
Yun Ma ◽  
Daohong Zhang
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Power ◽  
Negative Electrode ◽  
High Energy ◽  
Positive Electrode ◽  
High Energy Density ◽  
Asymmetric Supercapacitor ◽  
High Power Density ◽  
High Capacitance

A novel type of asymmetric supercapacitor was fabricated by assembling a RuO2 positive electrode and a Fe2O3 negative electrode. Full cells are constructed and show a high capacitance of 4.9 F cm−3, a high energy density of 1.5 mW h cm−3 and a high power density of 9.1 mW cm−3.

A HIGH ENERGY DENSITY ZINC/OXYGEN BATTERY SYSTEM

1966 ◽  
Author(s):  
S. CHODOSH ◽  
E. KATSOULIS ◽  
M. ROSANSKY
Keyword(s):  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
Battery System

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.

Sign in / Sign up

Export Citation Format

Share Document