一种低成本,富含的基氧化固体电解质,具有高效的离子运输结构
Qingtao Wang1, Pengfei Du1, Peng Zhang1
1Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, College of Engineering, Northwest Normal University, Lanzhou 730070, China. wangqt@nwnu.edu.cn.
Nanoscale
|October 2, 2025
概括
研究人员通过添加Li2O,在Li2ZrCl6固体电解质中增强了离子导电性. 这种修改改善了离子导电性,并使高性能全固态电池 (ASSLB) 的开发成为可能.
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
- 固态离子学 固态离子学
背景情况:
- 化物固体电解质对于高性能全固态电池 (ASSLBs) 是至关重要的,因为它们的稳定性和可压缩性.
- 低成本的Li2ZrCl6看起来很有前途,但由于室温低的离子导电性而受到影响.
- 提高离子导电性是释放化物固体电解质对ASSLBs的潜力的关键.
研究的目的:
- 通过结合和氧来增强Li2ZrCl6的离子导电性.
- 为了研究改性电解质的结构和电化学特性.
- 为了评估使用新型电解质的全固态电池的性能.
主要方法:
- 通过高能球磨法将Li2O纳入Li2ZrCl6,以诱导丰富和相变.
- 在25°C进行结构特征和离子导电性测量.
- 密度函数理论 (DFT) 计算,以了解导电性增强的机制.
- 使用新型电解质的全固态电池 (ASSLB) 的制造和电化学测试.
主要成果:
- 合成一种单临床Li6ZrCl6O2电解质,其结构与Li3ScCl6相似,与三角相不同.
- 在25°C时达到6.69 × 10−4 S cm−1的离子导电性.
- DFT的计算和实验证实了度的提高,晶体结构的转变和优化的表面结构.
- 该ASSLB的初始库伦比效率为84.85%,放电容量为204.58 mAh g-1,并在100个循环后保持93.5%的容量.
结论:
- 的丰富和 Li2O 加入引起的相变显著提高了 Li2ZrCl6.6 的离子导电性.
- 合成的Li6ZrCl6O2固体电解质显示出开发高性能ASSLB的巨大潜力.
- 该研究提供了一种可行的策略,用于优化化物固体电解质,用于下一代储能.
相关概念视频
02:42Ionic Crystal Structures
16.8K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
16.8K
02:48Ionic Bonding and Electron Transfer
48.7K
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.
48.7K
02:54Trends in Lattice Energy: Ion Size and Charge
26.5K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
26.5K