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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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Formation of Complex Ions03:45

Formation of Complex Ions

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A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
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Qualitative Analysis03:46

Qualitative Analysis

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For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
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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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Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

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Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions. 
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Extraction: Advanced Methods00:56

Extraction: Advanced Methods

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Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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用于高性能Mn金属电池的单化物电解质

Jian Zhang1, Fang Chen2, Zhiyi Liu1

  • 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.

Angewandte Chemie (International ed. in English)
|December 27, 2025
PubMed
概括

使用单化物如MnBr2的新型 (Mn) 电解质使可充电金属电池 (MMB) 能够稳定高效. 这些先进的电解质可促进可逆的Mn/剥离,用于可持续的能源储存.

关键词:
海尔德电解质是一种电解质.金属电池 金属电池在Mn上/脱落.溶解结构是一个溶解结构.

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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
  • 可持续能源 可持续能源

背景情况:

  • 可充电 (Mn) 电池由于Mn的丰富性和特性,对可持续的储能充满希望.
  • 开发稳定的基于Mn的电解质,用于可逆的Mn涂层/脱落,是一个关键的挑战.

研究的目的:

  • 为高性能Mn金属电池 (MMB) 开发新型,低成本的Mn电解质.
  • 研究单化物 (MnBr2或MnCl2) 基电解质作为混合系统的替代品.
  • 为了证明改进的Mn涂层/剥离稳定性和电池性能.

主要方法:

  • 使用单一化物 (MnBr2,MnCl2) 和三乙烯酸盐溶剂合成和优化Mn电解质.
  • 研究了Mn阳极上的Mn/剥离行为.
  • 使用各种阴极 (有机宿主,活性炭,Br-/Br0) 测试了MMB的性能.

主要成果:

  • 优化的MnBr2电解质在1300多小时的时间里表现出稳定的Mn涂层/剥离,并具有高的库伦比效率 (>1-50 mAh cm-2).
  • 低超电位 (<200 mV在0.5 mA cm-2时) 和在Mn阳极上抑制了被动化层的形成.
  • 通过使用不同的阴极,MMB实现了长周期寿命 (> 2000 个周期) 和高电压 (1.6 V).

结论:

  • 基于单化物的电解质为先进的MMB提供了一个新的设计概念.
  • 开发的电解质为可充电的金属电池提供了卓越的稳定性和性能.
  • 这种方法可能适用于其他多价金属电池.