scholarly journals High-performance all-organic aqueous batteries based on a poly(imide) anode and poly(catechol) cathode

2021 ◽  
Vol 9 (1) ◽  
pp. 505-514
Author(s):  
Nagaraj Patil ◽  
Andreas Mavrandonakis ◽  
Christine Jérôme ◽  
Christophe Detrembleur ◽  
Nerea Casado ◽  
...  
Keyword(s):  
Power Density ◽  
High Performance ◽  
Cell Voltage ◽  
Charge Carriers ◽  
Full Cell ◽  
Poly Imide ◽  
Aqueous Batteries

All-organic aqueous batteries based on universal poly(imide) anodes and poly(catechol) cathodes with tunable cell voltage are reported by exploiting different charge carriers (Li+, Zn2+, Al3+, and Li+/H+). A full-cell achieves the highest energy/power density of 80.6 W h kg−1/348 kW kg−1 in Li+/H+.

High performance polyanthraquinone/Co–Ni(OH)2 aqueous batteries based on hydroxyl and potassium insertion/extraction reactions

2020 ◽  
Vol 4 (1) ◽  
pp. 132-137 ◽  
Author(s):  
Chang Liu ◽  
Ting Ma ◽  
Kexin Xia ◽  
Xuesen Hou ◽  
Qingshun Nian ◽  
...  
Keyword(s):  
Power Density ◽  
High Performance ◽  
Cycling Performance ◽  
High Energy ◽  
Aqueous Batteries

A high performance poly(1,4-anthraquinone)/Ni(OH)2 dual-ion battery is designed with high energy/power density and good cycling performance.

scholarly journals Reliability-Oriented Design of Inverter-Fed Low-Voltage Electrical Machines: Potential Solutions

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4144
Author(s):  
Yatai Ji ◽  
Paolo Giangrande ◽  
Vincenzo Madonna ◽  
Weiduo Zhao ◽  
Michael Galea
Keyword(s):  
Power Density ◽  
High Speed ◽  
High Performance ◽  
Low Voltage ◽  
Electrical Machines ◽  
Design Stage ◽  
Switching Frequency ◽  
Special Focus ◽  
Electrical Machine ◽  
Engineering Approach

Transportation electrification has kept pushing low-voltage inverter-fed electrical machines to reach a higher power density while guaranteeing appropriate reliability levels. Methods commonly adopted to boost power density (i.e., higher current density, faster switching frequency for high speed, and higher DC link voltage) will unavoidably increase the stress to the insulation system which leads to a decrease in reliability. Thus, a trade-off is required between power density and reliability during the machine design. Currently, it is a challenging task to evaluate reliability during the design stage and the over-engineering approach is applied. To solve this problem, physics of failure (POF) is introduced and its feasibility for electrical machine (EM) design is discussed through reviewing past work on insulation investigation. Then the special focus is given to partial discharge (PD) whose occurrence means the end-of-life of low-voltage EMs. The PD-free design methodology based on understanding the physics of PD is presented to substitute the over-engineering approach. Finally, a comprehensive reliability-oriented design (ROD) approach adopting POF and PD-free design strategy is given as a potential solution for reliable and high-performance inverter-fed low-voltage EM design.

High rate and stable symmetric potassium ion batteries fabricated with flexible electrodes and solid-state electrolytes

Nanoscale ◽  
2018 ◽  
Vol 10 (44) ◽  
pp. 20754-20760 ◽  
Author(s):  
Ke Lu ◽  
Hong Zhang ◽  
Siyuan Gao ◽  
Yingwen Cheng ◽  
Houyi Ma
Keyword(s):  
Solid State ◽  
Prussian Blue ◽  
High Performance ◽  
Potassium Ion ◽  
High Rate ◽  
Flexible Electrodes ◽  
Bipolar Electrodes ◽  
Solid State Electrolytes ◽  
Aqueous Batteries

Prussian blue particles were deposited on polypyrrole coated wiper clothes and used as bipolar electrodes for fabrication of high performance flexible solid state K-ion aqueous batteries.

The Synthesis of CuS Hexagonal Nanosheet-Graphene for Use as a High Performance Photocatalyst

NANO ◽  
2016 ◽  
Vol 11 (05) ◽  
pp. 1650054 ◽  
Author(s):  
Bin Zeng ◽  
Yang Yin
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
High Performance ◽  
Organic Pollutant ◽  
High Photocatalytic Activity ◽  
Charge Carriers ◽  
Thermal Method ◽  
One Pot ◽  
Graphene Nanocomposites ◽  
Excellent Photocatalytic Activity

CuS hexagonal nanosheet/graphene was fabricated by a facile one-pot microwave-thermal method. The samples possess excellent photocatalytic activity for degradation of organic pollutant under visible light. The high photocatalytic activity was attributed to the deposition of CuS hexagonal nanosheet onto graphene. CuS nanosheet serves as a transporter which efficiently inhibits the recombination of the photo-induced charge carriers in the nanocomposites. The developed method demonstrates a facile approach towards the synthesis of two-dimensional semiconductor-graphene nanocomposites with excellent photocatalytic performance under visible light.

A high performance solid state asymmetric supercapacitor device based upon NiCo2O4nanosheets//MnO2microspheres

RSC Advances ◽  
2016 ◽  
Vol 6 (74) ◽  
pp. 70292-70302 ◽  
Author(s):  
Syed Khalid ◽  
Chuanbao Cao ◽  
Lin Wang ◽  
Youqi Zhu ◽  
Yu Wu
Keyword(s):  
Solid State ◽  
Energy Density ◽  
Power Density ◽  
High Performance ◽  
Asymmetric Supercapacitor ◽  
State Device ◽  
Solid State Device

The volumetric energy density and power density of a novel solid state device (NiCo2O4//MnO2) are much higher than most reported devices.

scholarly journals Origin of long lifetime of band-edge charge carriers in organic–inorganic lead iodide perovskites

2017 ◽  
Vol 114 (29) ◽  
pp. 7519-7524 ◽  
Author(s):  
Tianran Chen ◽  
Wei-Liang Chen ◽  
Benjamin J. Foley ◽  
Jooseop Lee ◽  
Jacob P. C. Ruff ◽  
...  
Keyword(s):  
High Performance ◽  
Carrier Lifetime ◽  
Charge Carriers ◽  
Band Edge ◽  
Lead Iodide ◽  
Solar Cell Performance ◽  
Photovoltaic Materials ◽  
Wide Range ◽  
Long Lifetime ◽  
Photon Recycling

Long carrier lifetime is what makes hybrid organic–inorganic perovskites high-performance photovoltaic materials. Several microscopic mechanisms behind the unusually long carrier lifetime have been proposed, such as formation of large polarons, Rashba effect, ferroelectric domains, and photon recycling. Here, we show that the screening of band-edge charge carriers by rotation of organic cation molecules can be a major contribution to the prolonged carrier lifetime. Our results reveal that the band-edge carrier lifetime increases when the system enters from a phase with lower rotational entropy to another phase with higher entropy. These results imply that the recombination of the photoexcited electrons and holes is suppressed by the screening, leading to the formation of polarons and thereby extending the lifetime. Thus, searching for organic–inorganic perovskites with high rotational entropy over a wide range of temperature may be a key to achieve superior solar cell performance.

High-performance capacitors based on NaNbO3 nanowires/poly(vinylidene fluoride) nanocomposites

2018 ◽  
Vol 6 (30) ◽  
pp. 14614-14622 ◽  
Author(s):  
Zhongbin Pan ◽  
Lingmin Yao ◽  
Guanglong Ge ◽  
Bo Shen ◽  
Jiwei Zhai
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Performance ◽  
Vinylidene Fluoride ◽  
Nanocomposite Films ◽  
Discharge Energy ◽  
High Discharge ◽  
Fast Discharge ◽  
Poly Vinylidene Fluoride ◽  
Discharge Energy Density

Nanocomposite films loaded with small NaNbO3 nanowires exhibit a high discharge energy density of 12.26 J cm−3 at 410 MV m−1, superior power density of 2.01 MW cm−3, and ultra-fast discharge speed of 146 ns.

scholarly journals Hard Switching Characteristics of SiC and GaN Devices for Future Electric Vehicle Charging Stations

2021 ◽  
Vol 335 ◽  
pp. 02007
Author(s):  
Gowthamraj Rajendran ◽  
Chockalingam Aravind Vaithilingam ◽  
Kanendra Naidu ◽  
Kameswara Satya Prakash ◽  
Md Rishad Ahmed
Keyword(s):  
Electric Vehicle ◽  
Power Density ◽  
High Performance ◽  
High Efficiency ◽  
Power Sources ◽  
Electric Vehicle Charging ◽  
Vienna Rectifier ◽  
Vehicle Charging ◽  
Switching Characteristics ◽  
Charging Stations

Wide bandgap (WBG) semiconductors offer better switching and lower losses, and it is not uncommon to utilize them for high power density, high-efficiency applications. Gallium nitride (GaN) and Silicon carbide (SiC) are the most common WBG materials that are responsible for major switching level changes relative to silicon (Si) devices. This paper explores the contrast of performance between Si, SiC, and GaN devices. The output performance of Si, SiC, and GaN power devices includes efficiency, energy bandgap, thermal conductivity, carrier mobility, saturation speed, power density, switching characteristics, and conduction losses. This article also proposes a Vienna rectifier with GaN materials, which operates as a front-end rectifier on a high-density battery charger targeted at high-performance applications such as electric vehicle charging stations, aircraft applications, and welding power sources. The system would reduce the total harmonics distortion (THD) to less than 5%, and the power factor would be increased to unity to satisfy the IEEE-519 standard.

CeO2 Nanocrystal Decorated TiO2 Nanobelt with Enhanced Photocatalytic Performance

2021 ◽  
Vol 21 (4) ◽  
pp. 2647-2652
Author(s):  
Yanchen Ji ◽  
Guoxin Song ◽  
Ruiqi Yang ◽  
Longhua Ding ◽  
Aizhu Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Water Treatment ◽  
Light Absorption ◽  
High Performance ◽  
Photocatalytic Performance ◽  
Synthesis Method ◽  
Charge Carriers ◽  
Controllable Synthesis ◽  
Visible Light Absorption ◽  
Potential Applications

In this work, CeO2 nanocrystal-decorated TiO2 nanobelt for forming a CeO2@TiO2 heterostructure. CeO2 plays a dual role in improving photocatalytic activity, not only by promoting the separation and transfer of photogenerated charge carriers, but also by increasing visible light absorption of the photocatalyst as a photosensitizer. The as-prepared CeO2@TiO2 heterostructure demonstrates the performance of organic degradation and H2 production (about 17 μmol/h/g, which is about 2.5 times higher than that of pure TiO2 nanobelts). Our work provides a facile and controllable synthesis method for high performance photocatalyst, which will have potential applications in synthesis clean/solar fuel, and photocatalytic water treatment.

Sign in / Sign up

Export Citation Format

Share Document