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相关概念视频

Electrical Transport01:29

Electrical Transport

The electrical transport property of a material is defined by its resistance and conductivity. Resistance is the measure of a material's ability to resist the flow of electric current, while conductivity gauges its ability to allow the current to pass through, depending on the geometry of the measurement cell, such as electrode spacing and area. Conductivity is measured in Siemens (S). There are different types of conductance, including specific conductance, equivalent conductance, and molar...
Types Of Superconductors01:28

Types Of Superconductors

A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
Ionic Association01:28

Ionic Association

The ionic association is the association of oppositely charged ions in an electrolyte solution to form ion pairs. Bjerrum defined ion pairs as two oppositely charged ions whose electrostatic attraction exceeds the thermal energy of the system, typically expressed as 2kT. Electrostatic attraction depends on ionic charge, separation distance, and the dielectric constant of the medium. Thermal energy, represented by kT, reflects the tendency of ions to move independently due to molecular motion.
The Electrical Double Layer01:30

The Electrical Double Layer

In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
Superconductor01:24

Superconductor

A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...

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Li10SnP2S12:一个负担得起的超离子导体.

Philipp Bron1, Sebastian Johansson, Klaus Zick

  • 1Fachbereich Chemie und Wissenschaftliches Zentrum für Materialwissenschaften (WZMW), Philipps-Universität Marburg , Hans-Meerwein-Straße, 35043 Marburg, Germany.

Journal of the American Chemical Society
|October 2, 2013
PubMed
概括

研究人员合成了一种新的超离子导体,锡硫化物 (Li10SnP2S12),具有高离子导电性. 这种材料为先进的储能应用提供了现有技术的经济有效的替代方案.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 固态化学 固态化学
  • 电化学 电化学 电化学

背景情况:

  • 超离子导体对于先进的电池技术至关重要.
  • 和硫化 (Li10GeP2S12) 具有创纪录的离子导电性,但依赖于昂贵的.
  • 需要具有成本效益的超声波导体,具有可比性能.

研究的目的:

  • 为了合成和描述一种新的硫酸超离子导体.
  • 为了评估新材料的离子导电性.
  • 评估通过用锡代替来降低成本的潜力.

主要方法:

  • 使用硫化 (Li2S),硫化 (P2S5) 和硫酸 (Li4[SnS4]) 的固态反应合成.
  • 电化学阻抗光谱法用于测量离子导电.
  • 结构和组成分析 (细节未提供摘要).

主要成果:

  • 成功合成了Li10SnP2S12,这是Li10GeP2S12.12的硫酸盐模拟物.
  • 达到高离子导电性:7mS/cm (颗粒) 和4mS/cm (总) 在27°C.
  • 与相比,锡基材料提供了大约3倍的潜在成本降低.

结论:

  • 10SnP2S12是一种具有高离子导电性的有前途的新型超离子导体.
  • 这种基材料的性能与Li10GeP2S12.2的性能相当.
  • 这一发现为更实惠,高性能固态电解质铺平了道路.