Results 251 to 260 of about 23,486 (289)

Hybrid lithium-ion capacitors with asymmetric graphene electrodes

Journal of Materials Chemistry A, 2017
A dual-graphene LIC delivered a high energy density of 222 W h kg−1 with a power density of 410 W kg−1.
Yige Sun, Jie Tang, Faxiang Qin, Jinshi Yuan, Kun Zhang, Jing Li, Da-Ming Zhu, Lu-Chang Qin   +7 more
openaire   +1 more source

Cu-doped NiO for aqueous asymmetric electrochemical capacitors

Ceramics International, 2014
Abstract In this work, the influence of Cu doping on the electrochemical properties of NiO was investigated regarding its performance as electrodes in aqueous supercapacitors. NiO and Ni1−xCuxO (x=0.5–3%) cathode materials were synthesized via a citrate-gel process.
Guohui Yuan, Yunfu Liu, Min Yue, Hongju Li, Encheng Liu, Youyuan Huang, Dongliang Kong   +6 more
openaire   +1 more source

Asymmetric electronic deformation in graphene molecular capacitors

International Journal of Quantum Chemistry
AbstractAsymmetric deformation density analysis is applied on bilayer graphene flakes as molecular capacitors to identify the extent of asymmetric distribution of electrons and holes when exposed to bias voltage. Three triangular, orthorhombic, and hexagonal symmetries for graphene flakes are considered in two sizes and electric field potential is ...
S. Salehfar, S. M. Azami
openaire   +1 more source

Electrochemical capacitance of NiO/Ru0.35V0.65O2 asymmetric electrochemical capacitor

Journal of Power Sources, 2007
Abstract A designed asymmetric hybrid electrochemical capacitor was presented where NiO and Ru0.35V0.65O2 as the positive and negative electrode, respectively, both stored charge through reversible faradic pseudocapacitive reactions of the anions (OH−) with electroactive materials.
Chang-Zhou Yuan, Bo Gao, Xiao-Gang Zhang
openaire   +1 more source

A Novel Boost Fifteen-Level Asymmetrical Flying-Capacitor Inverter with Natural Balancing of Capacitor Voltages

2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC), 2021
In this article, a novel Boost Fifteen-level Flying-Capacitor (BFFC) inverter is suggested. The proposed inverter employs eleven switches, four diodes, two capacitors, and three voltage sources to generate a boosted output voltage. The boosting characteristic of the proposed inverter is obtained by using the capacitors serried to the input voltage ...
Jaber Fallah Ardashir, Behrouz Rozmeh, Mahdi Gasemi, Amin Mohammadpour Shotorbani, Amir Aminzadeh Ghavifekr   +4 more
openaire   +1 more source

Asymmetric Conduction and Stability of Polymer Tantalum Capacitors

ECS Journal of Solid State Science and Technology, 2015
Conduction asymmetry and DC leakage (DCL) current variations with time were investigated in Polymer Hermetically Sealed (PHS) Ta capacitors. The hermetic design facilitates the control of the atmosphere inside these Ta capacitors, in particular the amount of moisture, and maintains it during long-term testing.
Y. Freeman, G. F. Alapatt, W. R. Harrell, I. Luzinov, P. Lessner   +4 more
openaire   +1 more source

A New Asymmetric Switched-Capacitor Inverter for Photovoltaic Systems

2020 IEEE 9th International Power Electronics and Motion Control Conference (IPEMC2020-ECCE Asia), 2020
This paper presents a new switched-capacitor multi-level inverter (SCMLI) for photovoltaic systems which can eliminate the leakage current. The traditional SCMLI suffer from the H-Bridge to obtain negative levels, which create variable common mode voltage (CMV) and so generates the leakage current.
Mehdi Samizadeh, Xiaoteng Li, Xu Yang, Bagher Karami, Wenjie Chen, Alaaeldin Hassan, Mohamad Abou Houran, Majid Kamranian   +7 more
openaire   +1 more source

Comparing Symmetric and Asymmetric Electrochemical Capacitors: A Modeling Approach

ECS Meeting Abstracts, 2013
Abstract not Available.
John Staser, John W. Weidner
openaire   +1 more source

Bifunctional Activated Carbon-Lithium Ceramic for Hybrid Asymmetric Capacitor

ECS Meeting Abstracts, 2018
The industrial world needs energy storage devices rather than lithium batteries or double-layer electrochemical capacitors with a specific power and energy density. One of the challenges is to build a durable and safe hybrid supercapacitor with high energy density and specific power and long life.
Matias Manzano, Hugo A Mosqueda, Jorge Gabriel Vázquez, Ignacio González   +3 more
openaire   +1 more source

Graphene–MnO2 nanocomposite for high-performance asymmetrical electrochemical capacitor

Materials Research Bulletin, 2014
Abstract Graphene–MnO2 (GR–MnO2) nanocomposites with different MnO2 amounts have been synthesized by a simple redox reaction between GR and KMnO4 at 70 °C, in which GR as a supporting substrate to grow MnO2. Ultrathin MnO2 nanoflakes with a layered structure are dispersed on the surface of GR nanosheets, and the incorporation of MnO2 nanoflakes onto ...
Gaini Zhang, Lijun Ren, LingJuan Deng, Jianfang Wang, Liping Kang, Zong-Huai Liu   +5 more
openaire   +1 more source