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相关概念视频

Batteries and Fuel Cells03:12

Batteries and Fuel Cells

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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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Ion Exchange01:17

Ion Exchange

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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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Electrolysis03:00

Electrolysis

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In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
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Ionic Bonds00:42

Ionic Bonds

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Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
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Electrolyte and Nonelectrolyte Solutions02:21

Electrolyte and Nonelectrolyte Solutions

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Substances that undergo either a physical or a chemical change in solution to yield ions that can conduct electricity are called electrolytes. If a substance yields ions in solution, that is, if the compound undergoes 100% dissociation, then the substance is a strong electrolyte. Complete dissociation is indicated by a single forward arrow. For example, water-soluble ionic compounds like sodium chloride dissociate into sodium cations and chloride anions in aqueous solution.
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Phosphate Buffer01:22

Phosphate Buffer

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The phosphate buffer system is a critical biological mechanism for maintaining pH stability in the body. This system operates primarily through two components: sodium dihydrogen phosphate (NaH2PO4), which acts as a weak acid, and sodium hydrogen phosphate (Na2HPO4), which serves as a weak base.
Sodium dihydrogen phosphate does not fully dissociate in neutral or acidic solutions. When a strong base, such as sodium hydroxide (NaOH), is introduced into the solution, sodium dihydrogen phosphate...
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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动态释放电解质设计用于稳定质子电池.

Jian Zhang1,2, Qing Lang1,2, Jiayuan Yu1,2

  • 1Zhejiang Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology, Materials Tech Laboratory for Hydrogen & Energy Storage, Ningbo Institute of Materials Technology and Engineering (NIMTE) of the Chinese Academy of Sciences (CAS), Ningbo, 315201, P. R. China.

ChemSusChem
|December 9, 2024
PubMed
概括

研究人员使用质子胺开发了一种用于水性质子电池 (APB) 的新电解质. 这种方法通过减少电极腐蚀,显著提高了电池的耐用性和循环寿命,从而实现了高功率的能量存储.

关键词:
腐蚀是一种腐蚀.毛孔选效果 毛孔选效果质子 (de−) 插入质子电池 质子电池质子胺氨酸是一种质子胺氨酸.

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科学领域:

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

背景情况:

  • 水性质子电池 (APB) 由于高效的质子化学,为低温和高功率应用提供了优势.
  • 在APB中常见的酸性电解质会对电极材料和电流收集器造成严重的腐蚀,限制电池寿命.
  • 开发稳定的电解质对于推进APB技术至关重要.

研究的目的:

  • 引入一种新型的质子运输媒介和APB释放源.
  • 为了减轻电解质诱导的腐蚀,并提高APB的循环寿命.
  • 允许在APB中使用更广泛的电极材料.

主要方法:

  • 利用质子胺作为质子运输媒介和释放源,利用其动态化学解离平衡.
  • 制定了一种具有几乎中性的pH值的优化电解质,以最大限度地减少自由质子度.
  • 在新的电解质中研究了CuFe-TBA,WO3和VO2 (B) 电极的电化学性能和循环稳定性.

主要成果:

  • 优化的电解质显著抑制了腐蚀,从而提高了电极的稳定性.
  • Fe-TBA电极表现出极好的循环性能,超过4万个循环,降解最小 (每周期约0.004%).
  • WO3和VO2 (B) 电极也表现出高循环稳定性,并且充满电池 (CuFe-TBA/WO3,CuFe-TBA/VO2 (B)) 显示出令人印象深刻的长期循环与高容量保留.

结论:

  • 质子胺作为一个有效的质子动态释放电解质,用于持久的APBs.
  • 开发的电解质扩大了材料选择范围,并通过减少腐蚀,显著改善了循环寿命.
  • 这种方法对开发可扩展和强大的储能系统具有很大的前景.