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相关概念视频

Alkali Metals03:06

Alkali Metals

19.3K
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
19.3K
Electrolysis03:00

Electrolysis

26.3K
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...
26.3K
Electron Configuration of Multielectron Atoms03:26

Electron Configuration of Multielectron Atoms

40.4K
The alkali metal sodium (atomic number 11) has one more electron than the neon atom. This electron must go into the lowest-energy subshell available, the 3s orbital, giving a 1s22s22p63s1 configuration. The electrons occupying the outermost shell orbital(s) (highest value of n) are called valence electrons, and those occupying the inner shell orbitals are called core electrons. Since the core electron shells correspond to noble gas electron configurations, we can abbreviate electron...
40.4K
MOS Capacitor01:25

MOS Capacitor

767
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
767
Batteries and Fuel Cells03:12

Batteries and Fuel Cells

27.3K
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...
27.3K
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

41.4K
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. 
41.4K

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相关实验视频

Updated: Jun 25, 2025

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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为离子电池使用的3.2V双层氧化物阴极.

Pawan Kumar Jha1, Shubham Kumar Parate2, Krishnakanth Sada1

  • 1Faraday Materials Laboratory (FaMaL), Materials Research Centre, Indian Institute of Science, Bangalore, 560012, India.

Small (Weinheim an der Bergstrasse, Germany)
|May 23, 2024
PubMed
概括

研究人员开发了一种用于离子电池 (KIB) 的新型无阴极. 这种P3型层氧化物表现出卓越的性能和可逆性,为具有成本效益的储能解决方案铺平了道路.

关键词:
P3类型的分层氧化物.阴极是天主体,它们是天主体.储能储能是一种储能方式.离子电池的电池是离子电池.

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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:

  • 离子电池 (KIB) 由于的丰富性和成本效益,为离子电池提供了一个有前途的替代品.
  • 开发高性能,经济性阴极对于KIB商业化至关重要.
  • 没有的正极材料对于可持续的能源储存非常理想.

研究的目的:

  • 为了合成和描述一种新的P3型层氧化物,K0.5Ni1/3Mn2/3O2,作为KIBs的潜在阴极.
  • 研究合成材料的电化学性能和离子 (去) 插入机制.
  • 探索 (Ni) 和 (Mn) 在调整阴极属性的作用.

主要方法:

  • 固态合成方法用于制备P3型K0.5Ni1/3Mn2/3O2阴极.
  • 在环境和高温 (40-50°C) 下进行电化学测试.
  • 第一个原则计算,以了解材料的结构属性关系.
  • 死后分析和电化学定位以阐明离子插入机制.

主要成果:

  • 这种P3型K0.5Ni1/3Mn2/3O2材料作为3.2V阴极起作用.
  • 在各种温度下观察到高度可逆的离子 (de) 插入.
  • 第一个原则的计算揭示了K含量和平面内Mn-Ni排序之间的强烈相关性.
  • 一种固体溶液机制控制K+ (de) 插入,Ni氧化还原在高电压下贡献,Mn氧化还原在低电压下.
  • 这种补充有效地提高了电化学性能.

结论:

  • P3型K0.5Ni1/3Mn2/3O2是一种有前途的低成本,无的阴极材料用于KIB.
  • 该材料具有出色的电化学性能和结构稳定性.
  • 这项研究为开发用于静态储能应用的先进KIB阴极提供了宝贵的见解.