scholarly journals Toward Positive Electrode Materials with High-Energy Density: Electrochemical and Structural Studies on LiCoxMn2–xO4with 0 ≤x≤ 1

ACS Omega ◽  
2017 ◽  
Vol 2 (8) ◽  
pp. 5142-5149 ◽  
Author(s):  
Kazuhiko Mukai ◽  
Takeshi Uyama
Keyword(s):  
Energy Density ◽  
Electrode Materials ◽  
High Energy ◽  
Positive Electrode ◽  
High Energy Density ◽  
Structural Studies ◽  
Positive Electrode Materials

Next Generation Positive Electrode Materials Enabled by Nanocomposites: -Metal Fluorides-

2002 ◽  
Vol 756 ◽  
Author(s):  
F. Badway ◽  
N. Pereira ◽  
F. Cosandey ◽  
G. G. Amatucci
Keyword(s):  
Energy Density ◽  
Electrode Materials ◽  
Specific Capacity ◽  
High Energy ◽  
Positive Electrode ◽  
High Energy Density ◽  
Metal Fluoride ◽  
Next Generation ◽  
Metal Fluorides ◽  
High Resolution Tem

ABSTRACTThrough the use of nanostructures and nanocomposites, the electrochemical activity of metal fluoride materials was opened as potential candidates as next generation high energy density positive electrodes for Li batteries. This class of materials, utilizing FeF3 as an example, is shown to exhibit good reversible behavior of approximately 200 mAh/g in the 3V region. The specific capacity is extended to 600 mAh/g when the discharge is extended to take into account the additional specific capacity associated with a 2V plateau. Through the use of XRD, SAED and high resolution TEM, the 2V reaction mechanism was associated to a reversible metal fluoride conversion mechanism. It is shown that LiF + Fe nanocomposite can be utilized as initial components in order to make the technology suitable for Li-ion applications. Although exhibiting relatively poor rate capabilities at this initial stage, reversible conversion metal fluorides enable for the first time the utilization of all the redox states of the constituent metal in a reversible manner in the positive electrode. This translates to 4X the specific capacity and double the energy density of today's state of the art LiCoO2.

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.

scholarly journals RECENT ADVANCES IN SODIUM INTERCALATION POSITIVE ELECTRODE MATERIALS FOR SODIUM ION BATTERIES

2013 ◽  
Vol 06 (01) ◽  
pp. 1330001 ◽  
Author(s):  
JING XU ◽  
DAE HOE LEE ◽  
YING SHIRLEY MENG
Keyword(s):  
Electrode Materials ◽  
High Energy ◽  
Positive Electrode ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Significant Progress ◽  
Layered Oxides ◽  
Solid State Physics ◽  
The Past ◽  
Positive Electrode Materials

Significant progress has been achieved in the research on sodium intercalation compounds as positive electrode materials for Na-ion batteries. This paper presents an overview of the breakthroughs in the past decade for developing high energy and high power cathode materials. Two major classes, layered oxides and polyanion compounds, are covered. Their electrochemical performance and the related crystal structure, solid state physics and chemistry are summarized and compared.

High energy density lithium ion batteries using Li2.6Co0.4−xCuxN (anode) and Cu0.04V2O5 (cathode) electrode materials

2008 ◽  
Vol 62 (26) ◽  
pp. 4210-4212 ◽  
Author(s):  
Daliang Liu ◽  
Shiying Zhan ◽  
Gang Chen ◽  
Wencheng Pan ◽  
Chunzhong Wang ◽  
...  
Keyword(s):  
Energy Density ◽  
Lithium Ion Batteries ◽  
Electrode Materials ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
Cathode Electrode

Nanocrystalline FeF3 and MF2 (M = Fe, Co, and Mn) from metal trifluoroacetates and their Li(Na)-ion storage properties

2017 ◽  
Vol 5 (16) ◽  
pp. 7383-7393 ◽  
Author(s):  
Christoph P. Guntlin ◽  
Tanja Zünd ◽  
Kostiantyn V. Kravchyk ◽  
Michael Wörle ◽  
Maryna I. Bodnarchuk ◽  
...  
Keyword(s):  
Energy Density ◽  
Power Density ◽  
Electrode Materials ◽  
Positive Electrode ◽  
Ion Storage ◽  
Metal Trifluoroacetates ◽  
Storage Properties ◽  
Positive Electrode Materials

With demands placed on batteries constantly increasing, new positive electrode materials with higher energy density, satisfactory power density, and long-term cycling capabilities, are desired.

Core–Shell Structured NiCo2O4@ZnCo2O4 Nanomaterials with High Energy Density for Hybrid Capacitors

2021 ◽  
Vol 16 (7) ◽  
pp. 1134-1142
Author(s):  
Wenduo Yang ◽  
Jun Xiang ◽  
Sroeurb Loy ◽  
Nan Bu ◽  
Duo Cui ◽  
...  
Keyword(s):  
Energy Density ◽  
Electrode Material ◽  
Composite Electrode ◽  
Electrode Materials ◽  
Structural Characteristics ◽  
High Energy ◽  
High Energy Density ◽  
Core Shell ◽  
Shell Composite ◽  
Hybrid Capacitors

NiCo2O4 as an electrode material for supercapacitors (SCs) has been studied by a host of researchers due to its unique structural characteristics and high capacitance. However, its performance has not yet reached the level of practical applications.it is an effective strategy to synthesize composite electrode materials for tackling the problem. Herein, NiCo2O4@ZnCo2O4 as a novel core–shell composite electrode material has been fabricated through a two-step simple hydrothermal method. The as-prepared sample can be directly used as cathode material of a supercapacitor, and its specific capacitance is 463.1 C/g at 1 A/g. An assembled capacitor has an energy density of 77 Wh·kg−1 at 2700 W·kg−1, and after 8000 cycles, 88% of the initial capacity remains.

Redox Targeting of Insulating Electrode Materials: A New Approach to High-Energy-Density Batteries

2006 ◽  
Vol 118 (48) ◽  
pp. 8377-8380 ◽  
Author(s):  
Qing Wang ◽  
Shaik M. Zakeeruddin ◽  
Deyu Wang ◽  
Ivan Exnar ◽  
Michael Grätzel
Keyword(s):  
Energy Density ◽  
Electrode Materials ◽  
High Energy ◽  
High Energy Density ◽  
New Approach
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