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相关概念视频

Oxygen Requirements and Growth Patterns01:29

Oxygen Requirements and Growth Patterns

164
Microorganisms exhibit diverse oxygen requirements and growth patterns driven by their metabolic strategies and environmental adaptations. Oxygen, while essential for many organisms, can also be toxic under certain conditions, shaping how microorganisms grow and survive.Oxygen Requirements of MicroorganismsMicroorganisms are classified based on their ability to use or tolerate oxygen:Obligate aerobes like Mycobacterium tuberculosis need oxygen for energy production, as it serves as the terminal...
164
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

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Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
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Oxidative Cleavage of Alkenes: Ozonolysis01:46

Oxidative Cleavage of Alkenes: Ozonolysis

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In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
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Oxygen Delivering System II: Venturi Mask and Transtracheal Oxygen01:16

Oxygen Delivering System II: Venturi Mask and Transtracheal Oxygen

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Oxygen therapy is a pivotal aspect of medical care, particularly for patients with respiratory ailments. Two prominent oxygen-delivering systems include the Venturi mask and the transtracheal oxygen catheter.
Venturi Mask
The Venturi mask, named after the Venturi effect, is designed to deliver precise oxygen concentrations. It consists of a large tube with an oxygen inlet that narrows down, causing a pressure drop that pulls air in through adjustable side ports. The mask is a lightweight,...
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相关实验视频

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Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
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缺乏氧气的TiO是没有氧气的.

Yike Lei1, Yingchuan Zhang1, Yongkang Han1

  • 1School of Automotive Studies, Clean Energy Automotive Engineering Center, Tongji University (Jiading Campus) 4800 Cao'an Road Shanghai 201804 P. R. China xiaoqf@tongji.edu.cn.

RSC advances
|June 7, 2023
PubMed
概括

一种新的TiO2-x介层涂层通过抑制氧气释放,增强稳定性和提高电化学性能来显著改善丰富的Mn基层氧化物 (LMLO) 阴极,从而提高更好的电池的电化学性能.

科学领域:

  • 材料科学 材料科学 材料科学
  • 电化学 电化学 电化学
  • 储能 储能 储能 储能 储能 储能

背景情况:

  • 富含的基于Mn的分层氧化物 (LMLO) 阴极由于离子还氧化而具有高容量.
  • 在LMLO阴极中不可逆转的离子氧化还原反应导致结构降解和性能差.
  • 循环期间的氧气释放是影响LMLO阴极稳定的关键问题.

研究的目的:

  • 为了提高LMLO阴极的电化学性能和稳定性.
  • 为了减轻与不可逆转的离子氧化还原反应和氧气释放相关的问题.
  • 为了研究TiO2-x中间层作为防护涂层的有效性.

主要方法:

  • 用单面导电性缺氧TiO2-x介层覆盖商用Celgard分离器.
  • 电化学测试,包括容量保留和速率性能测量.
  • 操作差电化学质谱 (DEMS) 和X射线光电子谱 (XPS) 进行分析.

主要成果:

  • TiO2-x中间层提高了初始库伦比效率,从92.1%提高到95.8%.
  • 100个循环后的容量保留率从84.2%增加到91.7%.
  • 在5C的速度性能显著提高,从91.3mA hg-1提高到203.9mA hg-1.

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The Effect of Interfacial Chemical Bonding in TiO2-SiO2 Composites on Their Photocatalytic NOx Abatement Performance
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Growth and Electrostatic/chemical Properties of Metal/LaAlO3/SrTiO3 Heterostructures
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The Effect of Interfacial Chemical Bonding in TiO2-SiO2 Composites on Their Photocatalytic NOx Abatement Performance
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The Effect of Interfacial Chemical Bonding in TiO2-SiO2 Composites on Their Photocatalytic NOx Abatement Performance

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  • DEMS证实了氧气释放的抑制,而XPS表明副作用减少和改善了阴极电解质间相.

    • 结论:

    • 缺乏氧气的TiO2-x中间层有效地抑制了LMLO阴极释放的氧气.
    • 间层增强了电化学动力学,稳定性和库伦比效率.
    • 这种方法提供了一个有前途的策略,以提高先进电池的LMLO阴极性能.