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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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相关实验视频

Updated: Jun 21, 2025

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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用于高性能金属电池的基于丁硫的二元深度欧特克电解质.

Tiankun Zhou1, Chengjun Lei1, Jinye Li1

  • 1State Key Laboratory of Chem/Biosensing and Chemometrics, Joint International Research Laboratory of Energy Electrochemistry, Joint International Research Laboratory of Energy Electrochemistry, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China.

Angewandte Chemie (International ed. in English)
|July 15, 2024
PubMed
概括

这项研究介绍了一种使用LiTFSI和丁硫 (BdS) 的新型非易燃深电解质 (DEE),以提高金属电池的兼容性. 电解质形成了一个稳定的富含LiF的SEI层,提高了电池的寿命和效率.

关键词:
丁二烯硫 (BUTADIENE SULFONE) 是一种丁二烯硫.深度欧特克斯电解质的电解质金属的兼容性 金属的兼容性金属电池 金属电池的使用方法稳定的SEI.

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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:

  • 深度解电解质 (DEE) 为储能应用提供了独特的特性.
  • 在二进制DEE中实现稳定的 (Li) 金属阳极兼容性仍然是一个重大挑战.
  • 当前的DEE经常面临性能和安全方面的局限性,对于先进的电池设计而言.

研究的目的:

  • 开发一种具有增强金属阳极兼容性的非易燃二元DEE.
  • 调查改善金属兼容性背后的机制及其对电池性能的影响.
  • 评估开发的DEE策略对其他金属阳极的普遍适用性.

主要方法:

  • 使用二三甲硫胺 (LiTFSI) 和固体丁硫 (BdS) 的二元DEE的配方.
  • 电化学表征包括离子导电率,Li+离子迁移数和电化学窗口测量.
  • 使用实验和理论方法分析固体电解质间相 (SEI) 层.
  • 性能评价在 Li 基底的 Li 基底对称细胞和 Li 基底的 LiCoO2, Li 基底的 LiNi0.8Co0.1Mn0.1O2 全细胞.

主要成果:

  • LiTFSI-BdS DEE具有高离子导电性 (1.48 mS·cm-1),Li+迁移数 (0.52) 和一个宽的电化学窗口 (~4.5 V).
  • 由于Li表面的BdS吸附和变形,形成了富含LiF的SEI层,促进了LiTFSI优先反应.
  • 稳定的SEI层有效地抑制了Li树突的生长和气体演变,从而导致长周期寿命和高库伦比效率.
  • 博德斯 (BdS) 的eutectic策略证明了它对其他金属阳极如Na和Zn的适用性.

结论:

  • 开发的基于LiTFSI和BdS的非易燃二进制DEE显著提高了金属阳极的兼容性.
  • 形成一个富含LiF的SEI保护层对于稳定的循环和提高电池性能至关重要.
  • 这个DEE战略为开发更安全,更高效的下一代电池提供了一个有希望的方法.