scholarly journals Enlarging ion-transfer micropore channels of hierarchical carbon nanocages for ultrahigh energy and power densities

2021 ◽  
Author(s):  
Jin Zhao ◽  
Hao Fan ◽  
Guochang Li ◽  
Qiang Wu ◽  
Lijun Yang ◽  
...  
Keyword(s):  
Ion Transfer ◽  
Ultrahigh Energy ◽  
Power Densities ◽  
Hierarchical Carbon

Graphene-wrapped and cobalt oxide-intercalated hybrid for extremely durable super-capacitor with ultrahigh energy and power densities

Carbon ◽  
2014 ◽  
Vol 79 ◽  
pp. 192-202 ◽  
Author(s):  
Rajesh Kumar ◽  
Hyun-Jun Kim ◽  
Sungjin Park ◽  
Anchal Srivastava ◽  
Il-Kwon Oh
Keyword(s):  
Cobalt Oxide ◽  
Ultrahigh Energy ◽  
Super Capacitor ◽  
Power Densities

Construction of a hierarchical carbon coated Fe3O4 nanorod anode for 2.6 V aqueous asymmetric supercapacitors with ultrahigh energy density

2019 ◽  
Vol 7 (48) ◽  
pp. 27313-27322 ◽  
Author(s):  
Zhongyou Peng ◽  
Jun Huang ◽  
Ying Wang ◽  
Kai Yuan ◽  
Licheng Tan ◽  
...  
Keyword(s):  
Energy Density ◽  
Cycle Performance ◽  
Ultrahigh Energy ◽  
Asymmetric Supercapacitors ◽  
Carbon Coated ◽  
Hierarchical Carbon

An assembled 2.6 V aqueous CC/CW/Fe3O4@C//CC/CW/MnO2 ASC exhibits ultrahigh energy density and remarkable cycle performance, surpassing most of the reported ASCs.

scholarly journals High performance asymmetric supercapacitors with ultrahigh energy density based on hierarchical carbon nanotubes@NiO core–shell nanosheets and defect-introduced graphene sheets with hole structure

RSC Advances ◽  
2017 ◽  
Vol 7 (13) ◽  
pp. 7843-7856 ◽  
Author(s):  
Zenghui Qiu ◽  
Dawei He ◽  
Yongsheng Wang ◽  
Xuan Zhao ◽  
Wen Zhao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Energy Density ◽  
High Performance ◽  
Cost Effective ◽  
Graphene Sheets ◽  
Core Shell ◽  
Ultrahigh Energy ◽  
Asymmetric Supercapacitors ◽  
Hierarchical Carbon ◽  
Hole Structure

In this work, we report a fast and cost-effective cobalt catalyzed gasification strategy to obtain defect-introduced graphene sheets (DGNs) with hole structure.

Optimized Kinetics Match and Charge Balance Toward Potassium Ion Hybrid Capacitors with Ultrahigh Energy and Power Densities

Small ◽  
2020 ◽  
Vol 16 (42) ◽  
pp. 2003724
Author(s):  
Yufan Peng ◽  
Rui Zhang ◽  
Binbin Fan ◽  
Weijian Li ◽  
Zhen Chen ◽  
...  
Keyword(s):  
Potassium Ion ◽  
Ultrahigh Energy ◽  
Charge Balance ◽  
Power Densities ◽  
Hybrid Capacitors

Enhanced storage capability by biomass-derived porous carbon for lithium-ion and sodium-ion battery anodes

2018 ◽  
Vol 2 (10) ◽  
pp. 2358-2365 ◽  
Author(s):  
Jian Hao ◽  
Yanxia Wang ◽  
Caixia Chi ◽  
Jing Wang ◽  
Qingjie Guo ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Transfer Rate ◽  
Lithium Ion ◽  
Life Cycles ◽  
Sodium Ion ◽  
Sodium Ion Battery ◽  
Ion Transfer ◽  
Fast Ion ◽  
Power Densities

Efficient electrodes with impressive storage capability and fast ion transfer rate are urgently needed to meet the demand for higher energy/power densities and longer life cycles and large rate powering devices.

Ultrahigh–energy density lead-free dielectric films via polymorphic nanodomain design

Science ◽  
2019 ◽  
Vol 365 (6453) ◽  
pp. 578-582 ◽  
Author(s):  
Hao Pan ◽  
Fei Li ◽  
Yao Liu ◽  
Qinghua Zhang ◽  
Meng Wang ◽  
...  
Keyword(s):  
Energy Density ◽  
High Performance ◽  
Functional Materials ◽  
High Energy ◽  
High Energy Density ◽  
Lead Free ◽  
Dielectric Films ◽  
Electronic Systems ◽  
Ultrahigh Energy ◽  
Power Densities

Dielectric capacitors with ultrahigh power densities are fundamental energy storage components in electrical and electronic systems. However, a long-standing challenge is improving their energy densities. We report dielectrics with ultrahigh energy densities designed with polymorphic nanodomains. Guided by phase-field simulations, we conceived and synthesized lead-free BiFeO3-BaTiO3-SrTiO3 solid-solution films to realize the coexistence of rhombohedral and tetragonal nanodomains embedded in a cubic matrix. We obtained minimized hysteresis while maintaining high polarization and achieved a high energy density of 112 joules per cubic centimeter with a high energy efficiency of ~80%. This approach should be generalizable for designing high-performance dielectrics and other functional materials that benefit from nanoscale domain structure manipulation.

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