Materials Research for High Energy Density Electrochemical Capacitor

2008 ◽  
Vol 1100 ◽  
Author(s):  
Andrew F. Burke
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Dielectric Materials ◽  
High Energy ◽  
Cycle Life ◽  
High Energy Density ◽  
Capacitive Energy Storage ◽  
High Electronic Conductivity ◽  
Materials Research ◽  
Power Capability

AbstractIn April 2007, the Office of Basic Energy Science, United States Department of Energy organized and conducted a Basic Energy Sciences Workshop for Electrical Energy Storage at which basic research needs for capacitive energy storage were considered in detail. This paper is intended to highlight the materials research findings/needs of the workshop and to relate them to the development of high energy density capacitors that can have an energy density approaching that of lead acid batteries, a power density greater than that of lithium ion batteries, and cycle life approaching that of carbon/carbon double-layer capacitors. Capacitors inherently have long cycle life and high power capability so the key issue is how to increase their energy density with minimum sacrifice of their inherent cycle life and power advantages. This requires the development of electrode charge storage materials with an effective high specific capacitance (F/g) and high electronic conductivity. The most promising electrode materials appear to be optimized activated carbons, graphitic carbons, nanotube carbons, and metal oxides. Cells can be assembled that utilize one of these materials in the one electrode and another of the material in the other electrode. Such hybrid cells can operate at 3-4V using organic electrolytes and potentially can have energy densities of 15-25 Wh/kg. Initial research is also underway on solid-state, high energy density devices utilizing high dielectric materials (K>15000) which would operate at very high cell voltage. If such dielectric materials can be developed, these devices may have energy densities approaching those of lithium batteries.

scholarly journals Novel Lithium-Ion Capacitor Based on a NiO-rGO Composite

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3586
Author(s):  
Qi An ◽  
Xingru Zhao ◽  
Shuangfu Suo ◽  
Yuzhu Bai
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Power Density ◽  
High Power ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Energy ◽  
Cycle Life ◽  
High Energy Density ◽  
Lithium Ion Capacitor

Lithium-ion capacitors (LICs) have been widely explored for energy storage. Nevertheless, achieving good energy density, satisfactory power density, and stable cycle life is still challenging. For this study, we fabricated a novel LIC with a NiO-rGO composite as a negative material and commercial activated carbon (AC) as a positive material for energy storage. The NiO-rGO//AC system utilizes NiO nanoparticles uniformly distributed in rGO to achieve a high specific capacity (with a current density of 0.5 A g−1 and a charge capacity of 945.8 mA h g−1) and uses AC to provide a large specific surface area and adjustable pore structure, thereby achieving excellent electrochemical performance. In detail, the NiO-rGO//AC system (with a mass ratio of 1:3) can achieve a high energy density (98.15 W h kg−1), a high power density (10.94 kW kg−1), and a long cycle life (with 72.1% capacity retention after 10,000 cycles). This study outlines a new option for the manufacture of LIC devices that feature both high energy and high power densities.

Ultrahigh Charge-discharge Efficiency and High Energy Density of High-temperature Polymer Sandwiched

2021 ◽  
Author(s):  
Hanxi Chen ◽  
Zhongbin Pan ◽  
Yu Cheng ◽  
Xiangping Ding ◽  
Jinjun Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Energy Density ◽  
Elevated Temperatures ◽  
Dielectric Materials ◽  
High Energy ◽  
High Energy Density ◽  
Capacitive Energy Storage ◽  
New Generation ◽  
Discharge Efficiency ◽  
Charge Discharge

A new generation of high-temperature dielectric materials toward capacitive energy storage is highly demanded as power electronics are always exposed to elevated temperatures in high-power applications. Polymer dielectric materials, an...

A Low Cost, High Energy Density, and Long Cycle Life Potassium-Sulfur Battery for Grid-Scale Energy Storage

2015 ◽  
Vol 27 (39) ◽  
pp. 5915-5922 ◽  
Author(s):  
Xiaochuan Lu ◽  
Mark E. Bowden ◽  
Vincent L. Sprenkle ◽  
Jun Liu
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Low Cost ◽  
High Energy ◽  
Cycle Life ◽  
High Energy Density ◽  
Long Cycle ◽  
Long Cycle Life ◽  
Sulfur Battery

scholarly journals Polymer Nanocomposites with High Energy Density Utilizing Oriented Nanosheets and High-Dielectric-Constant Nanoparticles

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4780
Author(s):  
Yushu Li ◽  
Yao Zhou ◽  
Sang Cheng ◽  
Jun Hu ◽  
Jinliang He ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Energy Density ◽  
Polymer Nanocomposites ◽  
High Dielectric Constant ◽  
Vinylidene Fluoride ◽  
Dielectric Materials ◽  
High Energy ◽  
High Energy Density ◽  
Capacitive Energy Storage ◽  
High Dielectric

The development of high-energy-density electrostatic capacitors is critical to addressing the growing electricity need. Currently, the widely studied dielectric materials are polymer nanocomposites incorporated with high-dielectric-constant nanoparticles. However, the introduction of high-dielectric-constant nanoparticles can cause local electric field distortion and high leakage current, which limits the improvement in energy density. In this work, on the basis of conventional polymer nanocomposites containing high-dielectric-constant nanoparticles, oriented boron nitride nanosheets (BNNSs) are introduced as an extra filler phase. By changing the volume ratios of barium titanate (BT) and BNNSs, the dielectric property of polymer nanocomposites is adjusted, and thus the capacitive energy storage performance is optimized. Experimental results prove that the oriented BNNSs can suppress the propagation of charge carriers and decrease the conduction loss. Using poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-HFP)) as the polymer matrix, the P(VDF-HFP)/BNNS/BT nanocomposite has a higher discharged energy density compared with the conventional nanocomposite with the freely dispersed BT nanoparticles.

High-Temperature Polyimide Dielectric Materials for Energy Storage: Theory, Design, Preparation and Properties

2021 ◽  
Author(s):  
Xue-Jie Liu ◽  
Ming-Sheng Zheng ◽  
George Chen ◽  
Zhi-Min Dang ◽  
Jun-Wei Zha
Keyword(s):  
High Temperature ◽  
Energy Storage ◽  
Energy Density ◽  
Electric Vehicles ◽  
Operating Temperature ◽  
Dielectric Materials ◽  
High Energy ◽  
High Energy Density ◽  
Temperature Resistance ◽  
Storage Theory

The high operating temperature of dielectric capacitors applied in electric vehicles, aerospace and underground exploration require dielectric materials with high temperature resistance and high energy density. Polyimide (PI) turns out...

High energy density aqueous zinc–benzoquinone batteries enabled by carbon cloth with multiple anchoring effects

2021 ◽  
Author(s):  
Zhiqiang Luo ◽  
Silin Zheng ◽  
Shuo Zhao ◽  
Xin Jiao ◽  
Zongshuai Gong ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Porous Carbon ◽  
Large Scale ◽  
High Energy ◽  
High Energy Density ◽  
Carbon Cloth ◽  
Anchoring Effects ◽  
High Theoretical Capacity ◽  
Energy Storage Applications

Benzoquinone with high theoretical capacity is anchored on N-plasma engraved porous carbon as a desirable cathode for rechargeable aqueous Zn-ion batteries. Such batteries display tremendous potential in large-scale energy storage applications.

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