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Electrolyte and Nonelectrolyte Solutions02:21

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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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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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A concentration cell is a type of a  voltaic cell constructed by connecting two almost identical half-cells, both based on the same half-reaction and using the same electrode, differing only in the concentration of one redox species. A concentration cell's potential, therefore, is determined only by the concentration difference of the particular redox species.
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Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
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Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
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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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对于低温电池而言,本地化高度电解质没有相分离的变体.

Juan Yang1,2, Jian Shang3, Qirong Liu1

  • 1Advanced Energy Storage Technology Research Center Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China.

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概括

研究人员开发了用于双离子电池 (DIB) 的新型低温电解质 (ν-LHCE). 这些电解质在寒冷条件下提高稳定性和性能,使要求高的应用程序可靠的能量存储成为可能.

关键词:
电池 电池 电池 电池 电池低温低温低温的温度是什么阶段分离 阶段分离 阶段分离变体局部化高度电解质的变体弱溶解溶剂溶剂的溶解剂.

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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:

  • 双离子电池 (DIB) 在低温储能方面表现有前途.
  • 由于电解质氧化稳定性差以及在低温下接口问题,DIB的性能受到阻碍.
  • 现有的电解质在极端寒冷的环境中难以保持性能.

研究的目的:

  • 为通用低温应用设计先进的电解质.
  • 为了克服在零度以下温度下双离子电池中电流电解质的局限性.
  • 为了提高电解质的电化学稳定性和离子运输动力学,用于DIBs.

主要方法:

  • 开发变体局部化高度溶解结构 (ν-LHCE) 电解质.
  • 引入一种极其弱溶解溶剂来增强电解质特性.
  • 电化学稳定性,离子导电性和在低温下界面行为的表征.

主要成果:

  • ν-LHCE在低温下表现出增强的电化学氧化稳定性 (>5.5V) 和高离子导电性 (1mS/cm).
  • 观察到改善的Li+转移动力学和强大的介面相的形成.
  • 使用 ν-LHCE 的 DIB 在 -40°C (77.7%) 和 -60°C (51.6%) 实现了显著的容量保留.

结论:

  • 设计的v-LHCE电解质对于低温的双离子电池应用非常有效.
  • 这些电解质在极寒条件下提供了优良的长期循环稳定性和速率能力.
  • 这些发现强调了在极地勘探和寒冷地区可靠储能的潜力.