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通过离子电子双导电结合剂在空气中制造稳定的阳极,用于硫化物固态电池
Zhilu Wang1, Xuefeng Shen1, Shengjie Chen1
1State Key Laboratory for Mechanical Behavior of Materials, Shaanxi International Research Center for Soft Matter, Xi'an Jiaotong University, Xi'an, 710049, China.
Advanced materials (Deerfield Beach, Fla.)
|June 5, 2024
概括
一种新的双导电结合剂通过创建连续的离子和电子通路,使所有固态电池 (ASSB) 的强大的阳极成为可能. 这一创新避免了寄生反应,并允许在环境条件下制造,为实用,低成本的ASSB铺平了道路.
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:
- 阳极对于高能量密度全固态电池 (ASSB) 是至关重要的.
- 硫化物电解质和碳添加剂之间的寄生反应阻碍了ASSB的性能.
- 目前的电极制造方法需要严格的,对空气敏感的条件.
研究的目的:
- 为ASSB中的阳极开发一种新的离子电子双导电结合剂.
- 为了在环境空气条件下实现强大的阳极制造.
- 为了克服寄生反应的局限性和严格的操作要求.
主要方法:
- 在现场将减少的银纳米颗粒纳入高强度,富含以太的聚合物粘合剂.
- 在环境条件下使用双导电结合剂制造阳极.
- 用开发的阳极对ASSB进行半细胞和全细胞测试.
主要成果:
- 粘合剂建立了一个连续的离子和电子导电路径.
- 在半电池中,阳极表现出 1906.9 mAh g-1 的高容量和 2 C 的 500 个周期.
- 带有NCM90阴极的全细胞在5°C时显示2000个周期的稳定循环.
- 在环境空气和低堆压力 (5 MPa) 下成功制造电极.
结论:
- 开发的离子电子双导电结合剂可方便用于ASSB的阳极的实用,低成本制造.
- 这种粘合剂设计有效地抑制了寄生虫反应,并使在温和条件下运行.
- 绑定器是可扩展和高效的ASSB开发的有希望的功能组件.
相关概念视频
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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.
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Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
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