Large scale production of polyacrylonitrile-based porous carbon nanospheres for asymmetric supercapacitors

2018 ◽  
Vol 6 (16) ◽  
pp. 6891-6903 ◽  
Author(s):  
Yujing Liu ◽  
Jingyi Cao ◽  
Xiaohui Jiang ◽  
Yange Yang ◽  
Liangmin Yu ◽  
...  
Keyword(s):  
Large Scale ◽  
High Efficiency ◽  
Scale Production ◽  
Carbon Nanospheres ◽  
Energy Storage Devices ◽  
Asymmetric Supercapacitors ◽  
Storage Devices ◽  
Large Scale Production ◽  
Increasing Demand ◽  
Porous Carbon Nanospheres

The increasing demand for a satisfactory combination of energy–power features in supercapacitors has triggered considerable research efforts dedicated to the development of high-efficiency energy storage devices.

scholarly journals Efficient and large-area all vacuum-deposited perovskite light-emitting diodes via spatial confinement

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Peipei Du ◽  
Jinghui Li ◽  
Liang Wang ◽  
Liang Sun ◽  
Xi Wang ◽  
...  
Keyword(s):  
High Resolution ◽  
Large Scale ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Scale Production ◽  
Nonradiative Recombination ◽  
Large Area ◽  
Spatial Confinement ◽  
Light Emitting ◽  
Large Scale Production

AbstractWith rapid advances of perovskite light-emitting diodes (PeLEDs), the large-scale fabrication of patterned PeLEDs towards display panels is of increasing importance. However, most state-of-the-art PeLEDs are fabricated by solution-processed techniques, which are difficult to simultaneously achieve high-resolution pixels and large-scale production. To this end, we construct efficient CsPbBr3 PeLEDs employing a vacuum deposition technique, which has been demonstrated as the most successful route for commercial organic LED displays. By carefully controlling the strength of the spatial confinement in CsPbBr3 film, its radiative recombination is greatly enhanced while the nonradiative recombination is suppressed. As a result, the external quantum efficiency (EQE) of thermally evaporated PeLED reaches 8.0%, a record for vacuum processed PeLEDs. Benefitting from the excellent uniformity and scalability of the thermal evaporation, we demonstrate PeLED with a functional area up to 40.2 cm2 and a peak EQE of 7.1%, representing one of the most efficient large-area PeLEDs. We further achieve high-resolution patterned perovskite film with 100 μm pixels using fine metal masks, laying the foundation for potential display applications. We believe the strategy of confinement strength regulation in thermally evaporated perovskites provides an effective way to process high-efficiency and large-area PeLEDs towards commercial display panels.

PROPAGATION AND PRODUCTION OF GAC (MOMORDICA COCHINCHINENSIS SPRENG.), A GREENHOUSE CASE STUDY

2012 ◽  
Vol 49 (2) ◽  
pp. 234-243 ◽  
Author(s):  
SOPHIE E. PARKS ◽  
CARLY T. MURRAY ◽  
DAVID L. GALE ◽  
BASEM AL-KHAWALDEH ◽  
LORRAINE J. SPOHR
Keyword(s):  
Large Scale ◽  
Scale Production ◽  
Large Scale Production ◽  
Momordica Cochinchinensis ◽  
Increasing Demand ◽  
Potential Methods ◽  
Enhancing Production ◽  
First Time ◽  
Male To Female

SUMMARYGreater cultivation of the underutilised Gac fruit, Momordica cochinchinensis, by poorly resourced householders and farmers would potentially improve livelihoods, and, on a larger scale, meet the increasing demand for Gac as a health product. Cultivation methods need to be developed to suit small- and large-scale production and must consider the unpredictable ratio of male to female plants grown from seed, and slow growth induced by cool temperatures. In this study, we examined the responses of Gac to propagation and protected cropping techniques to identify potential methods for increasing production. Plants germinated from seed in seed-raising mix under warm and humid conditions were grown hydroponically to maturity in a climate-controlled greenhouse during a temperate winter, producing fruits that were harvested ripe, from 44 weeks after sowing. Cuttings taken from female plants were dipped in indole-3-butyric rooting hormone powder or gel, or were left untreated, and then placed in rock wool, potting mix, water or closed media sachet. All treatment combinations, with the exception of the untreated potting mix, permitted the development of healthy plants in a second greenhouse crop. Growing plants from seed, then vegetatively increasing the number of productive female plants by cuttings is a means to increase Gac production with limited resources. Gac production using greenhouse technology, as described here for the first time, is relevant to other temperate regions. The finding that larger fruits have a higher percentage of edible aril than smaller fruits provides a new area of investigation towards enhancing production.

Effects of various planting and harvesting times on the yield, HCN, dry-matter accumulation and starch content of four cassava varieties in a tropical rainforest region

1983 ◽  
Vol 101 (3) ◽  
pp. 633-636 ◽  
Author(s):  
G. O. Kayode
Keyword(s):  
Dry Matter ◽  
Large Scale ◽  
Tropical Rainforest ◽  
Starch Content ◽  
Human Consumption ◽  
Dry Matter Accumulation ◽  
Scale Production ◽  
Large Scale Production ◽  
Increasing Demand ◽  
Cassava Varieties

SUMMARYResults of a 2-year study in a rainforest zone of south-western Nigeria to determine the effects of various planting and harvesting times on the yield, HCN, dry-matter accumulation and starch contents of cassava showed that times of planting and harvesting significantly affected all the variables studied. May planting gave highest yield arid starch contents, which suggests that large-scale production of cassava for industrial starch and human consumption should be planted in the month of May.The harvesting time experiment shows that cassava tuber will continue to increase until the 24th month, although, because of increasing demand for land, it will not be economic to leave cassava on the field for more than 15 months. For optimum starch and dry-matter accumulation, cassava should be harvested between 12 and 15 months.

Growth and characterization of high-efficiency InGaN MQW blue and green LEDs from large-scale-production MOCVD reactors

1999 ◽  
Author(s):  
Chuong A. Tran ◽  
Robert F. Karlicek, Jr. ◽  
Michael G. Brown ◽  
Ivan Eliashevich ◽  
Alexander Gurary ◽  
...  
Keyword(s):  
Large Scale ◽  
High Efficiency ◽  
Scale Production ◽  
Large Scale Production ◽  
Green Leds

scholarly journals Influence of Substrate in Roll-to-roll Coated Nanographite Electrodes for Metal-free Supercapacitors

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Nicklas Blomquist ◽  
Rajesh Koppolu ◽  
Christina Dahlström ◽  
Martti Toivakka ◽  
Håkan Olin
Keyword(s):  
Energy Storage ◽  
Large Scale ◽  
Electrode Materials ◽  
Current Collector ◽  
Scale Production ◽  
Equivalent Series Resistance ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Metal Free ◽  
Roll To Roll

AbstractDue to the high electric conductivity and large surface area of nanographites, such as graphene and graphite nanoplatlets, these materials have gained a large interest for use in energy storage devices. However, due to the thin flake geometry, the viscosity of aqueous suspensions containing these materials is high even at low solids contents. This together with the use of high viscosity bio-based binders makes it challenging to coat in a roll-to-roll process with sufficient coating thickness. Electrode materials for commercial energy storage devices are often suspended by organic solvents at high solids contents and coated onto metal foils used as current-collectors. Another interesting approach is to coat the electrode onto the separator, to enable large-scale production of flat cell stacks. Here, we demonstrate an alternative, water-based approach that utilize slot-die coating to coat aqueous nanographite suspension with nanocellulose binder onto the paper separator, and onto the current collector as reference, in aqueous metal-free supercapacitors. The results show that the difference in device equivalent series resistance (ESR) due to interfacial resistance between electrode and current collector was much lower than expected and thus similar or lower compared to other studies with a aqueous supercapacitors. This indicates that electrode coated paper separator substrates could be a promising approach and a possible route for manufacturing of low-cost, environmentally friendly and metal-free energy storage devices.

Aqueous Manganese Dioxide Ink for High Performance Capacitive Energy Storage Devices

MRS Advances ◽  
2016 ◽  
Vol 1 (53) ◽  
pp. 3573-3578
Author(s):  
Jiasheng Qian ◽  
Shu Ping Lau ◽  
Jikang Yuan
Keyword(s):  
Energy Storage ◽  
High Performance ◽  
Large Scale ◽  
Energy Storage And Conversion ◽  
Potential Candidate ◽  
Scale Production ◽  
Energy Storage Devices ◽  
Capacitive Energy Storage ◽  
Storage Devices ◽  
Multi Walled Carbon Nanotubes

ABSTRACTWe report a simple approach to fabricate high performance energy storage devices based on aqueous inorganic ink comprised of hexagonal MnO2 nanosheets. The MnO2 ink exhibits long term stability. Continuous thin films can be formed on various substrates without using any binder. To obtain a flexible electrode for capacitive energy storage, we printed the MnO2 ink on commercially available A4 paper pre-treated by multi-walled carbon nanotubes. The electrode exhibited a maximum specific capacitance of 90.8 mF/cm2. The electrode could maintain 98.7% capacitance retention for 1,000 cycles at 10 mV/s. The MnO2 ink could be a potential candidate for large-scale production of flexible and printable electronic devices for energy storage and conversion.

The Local Electronic Structure Modulation of molybdenum selenide-nitride Heterojunction for Efficient Hydrogen Evolution Reaction

2021 ◽  
Author(s):  
Chuanyong Jian ◽  
Wenting Hong ◽  
Qian Cai ◽  
Wei Liu
Keyword(s):  
Large Scale ◽  
High Efficiency ◽  
Low Cost ◽  
Scale Production ◽  
Molybdenum Selenide ◽  
Large Scale Production ◽  
Alkaline Conditions ◽  
Local Electronic Structure ◽  
Structure Modulation ◽  
Current Densities

For the industrial implementation of electrochemical hydrogen production, the large-scale production of low-cost, high-efficiency, and stable electrocatalysts that work well at high current densities is critical in alkaline conditions. Here,...

I. S. A. Baud. Forms of Production and Women's Labour: Gender Aspects of Industrialisation in India and Mexico. New Delhi: Sage Publications. 1992. 321 pp.Hardbound. Price: Indian Rs 295.00.

1993 ◽  
Vol 32 (1) ◽  
pp. 129-131
Author(s):  
Naureen Talha
Keyword(s):  
Large Scale ◽  
Indian Society ◽  
New Delhi ◽  
Scale Production ◽  
Female Labour ◽  
Self Employment ◽  
Commodity Production ◽  
Large Scale Production ◽  
Mexican Society ◽  
Small Production

The literature on female labour in Third World countries has become quite extensive. India, being comparatively more advanced industrially, and in view of its size and population, presents a pictures of multiplicity of problems which face the female labour market. However, the author has also included Mexico in this analytical study. It is interesting to see the characteristics of developing industrialisation in two different societies: the Indian society, which is conservative, and the Mexican society, which is progressive. In the first chapter of the book, the author explains that he is not concerned with the process of industrialisation and female labour employed at different levels of work, but that he is interested in forms of production and women's employment in large-scale production, petty commodity production, marginal small production, and self-employment in the informal sector. It is only by analysis of these forms that the picture of females having a lower status is understood in its social and political setting.

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