High-energy and high-power Li-rich nickel manganese oxide electrode materials

2010 ◽  
Vol 12 (11) ◽  
pp. 1618-1621 ◽  
Author(s):  
Donghan Kim ◽  
Sun-Ho Kang ◽  
Mahalingam Balasubramanian ◽  
Christopher S. Johnson
Keyword(s):  
Manganese Oxide ◽  
High Power ◽  
Electrode Materials ◽  
High Energy ◽  
Oxide Electrode ◽  
Nickel Manganese

scholarly journals Nitrogen-enriched graphene framework from a large-scale magnesiothermic conversion of CO2 with synergistic kinetics for high-power lithium-ion capacitors

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Chen Li ◽  
Xiong Zhang ◽  
Kai Wang ◽  
Xianzhong Sun ◽  
Yanan Xu ◽  
...  
Keyword(s):  
Energy Density ◽  
High Power ◽  
Power Output ◽  
Large Scale ◽  
Electrode Materials ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
Chemical Doping ◽  
Lithium Ion Capacitor

AbstractLithium-ion capacitors are envisaged as promising energy-storage devices to simultaneously achieve a large energy density and high-power output at quick charge and discharge rates. However, the mismatched kinetics between capacitive cathodes and faradaic anodes still hinder their practical application for high-power purposes. To tackle this problem, the electron and ion transport of both electrodes should be substantially improved by targeted structural design and controllable chemical doping. Herein, nitrogen-enriched graphene frameworks are prepared via a large-scale and ultrafast magnesiothermic combustion synthesis using CO2 and melamine as precursors, which exhibit a crosslinked porous structure, abundant functional groups and high electrical conductivity (10524 S m−1). The material essentially delivers upgraded kinetics due to enhanced ion diffusion and electron transport. Excellent capacities of 1361 mA h g−1 and 827 mA h g−1 can be achieved at current densities of 0.1 A g−1 and 3 A g−1, respectively, demonstrating its outstanding lithium storage performance at both low and high rates. Moreover, the lithium-ion capacitor based on these nitrogen-enriched graphene frameworks displays a high energy density of 151 Wh kg−1, and still retains 86 Wh kg−1 even at an ultrahigh power output of 49 kW kg−1. This study reveals an effective pathway to achieve synergistic kinetics in carbon electrode materials for achieving high-power lithium-ion capacitors.

How to efficiently utilize electrode materials in supercapattery?

2019 ◽  
Vol 12 (01) ◽  
pp. 1830005 ◽  
Author(s):  
Kunfeng Chen ◽  
Dongfeng Xue
Keyword(s):  
High Power ◽  
Electrode Material ◽  
Redox Reaction ◽  
Electrode Materials ◽  
High Efficiency ◽  
Storage System ◽  
High Energy ◽  
Structure Design ◽  
High Energy Density ◽  
Charging Time

Theoretical stored capacity of one electrode material is decided by their thermodynamics factors, which can be achieved only when electrode materials fully react at quite long charging time. In order to store large quantities of charges in short charging time, high-efficiency utilization of electrode materials becomes more and more important. Both fast ionic and electronic transports represent the fundamental factor for high-efficiency utilization of electrode materials. Supercapattery, showing both high power density and high energy density, includes supercapattery-type electrode materials, leading to fast redox reaction. This paper focuses on the structure design of supercapattery-type electrode materials and electrode to satisfy dynamic demand for fast redox reaction of one electrode material. The use of redox active cations and the construction of active colloidal supercapatteries are described. This work will give enlightenment to design electrochemical energy storage system for high-power and high energy applications.

scholarly journals Valorization of lignin waste: high electrochemical capacitance of lignin-derived carbons in aqueous and ionic liquid electrolytes

2018 ◽  
Vol 6 (38) ◽  
pp. 18701-18711 ◽  
Author(s):  
Wantana Sangchoom ◽  
Darren A. Walsh ◽  
Robert Mokaya
Keyword(s):  
Ionic Liquid ◽  
Energy Density ◽  
Power Density ◽  
High Power ◽  
Electric Double Layer ◽  
Electrode Materials ◽  
High Energy ◽  
Electrochemical Capacitance ◽  
Liquid Electrolytes ◽  
Double Layer Capacitors

Valorisation of waste lignin generates porous carbons with attractive properties as high-energy/high-power electrode materials for electric double layer capacitors (EDLCs), achieving an energy density of 25 W h kg−1at a power density of 500 W kg−1in ionic liquid electrolytes.

Material Design Strategies to Achieve Simultaneous High Power and High Energy Density

MRS Advances ◽  
2018 ◽  
Vol 3 (22) ◽  
pp. 1269-1275 ◽  
Author(s):  
Qiyuan Wu ◽  
Calvin D. Quilty ◽  
Kenneth J. Takeuchi ◽  
Esther S. Takeuchi ◽  
Amy C. Marschilok
Keyword(s):  
High Power ◽  
Electrode Materials ◽  
Material Design ◽  
High Energy ◽  
High Energy Density ◽  
Design Strategies ◽  
Ion Diffusion ◽  
Battery Technology ◽  
Power And Energy ◽  
New Generation

ABSTRACTEmerging applications require batteries to have both high energy and high power which are not necessarily compatible. The typical inverse relationship between power and energy in batteries is often due to the slow ion diffusion in electrode materials. While the optimization of current battery technology may be sufficient to fully address this issue, we present here that novel chemistry-focused strategies based on new fundamental understanding of materials may be applied to lead to the development of a new generation of batteries that store energy sufficiently and deliver it rapidly.

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