对于使用气体吸收剂的硫化物基全固态电池的有效催化剂
Hyunbeen Choi1, Sungjin Cho1, Yoon-Seong Kim2
1Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea.
Small (Weinheim an der Bergstrasse, Germany)
|July 11, 2024
概括
氧化物 (ZnO) 添加到具有硫化物固体电解质 (SSEs) 的全固态电池中,有效抑制了副作用反应和气体生成,改善了电池容量和稳定性,用于下一代储能.
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
- 固态化学 固态化学
背景情况:
- 全固态电池 (ASSB) 提供了更高的安全性和能量密度.
- 硫化物固体电解质 (SSEs) 具有较高的离子导电性,这使得它们对ASSB有很大的希望.
- SSE与阴极活性材料 (CAM) 之间的界面副作用反应以及气体生成阻碍了ASSB的性能.
研究的目的:
- 研究氧化 (ZnO) 作为ASSB的阴极复合材料中的保护性添加剂的有效性.
- 阐明ZnO减轻副作用和气体生成的机制.
- 了解ZnO对ASSB容量减少和内部电阻的影响.
主要方法:
- 制造含有氧化 (ZnO) 的正极复合材料.
- 使用质谱仪监测ASSB细胞内的气体生成.
- 使用密度函数理论 (DFT) 计算来分析界面侧反应和容量衰减机制.
主要成果:
- 加入 ZnO 有效地减少了 SSE 和 CAM 之间的界面副作用.
- ZnO充当半导体,减轻电解质氧化,并吸收硫化物基气体.
- DFT计算提供了对副作用和减少容量的原因的清晰理解.
结论:
- 氧化是一种可行的添加剂,可以增强硫化基ASSB的稳定性和性能.
- 通过ZnO减轻副作用和产生气体对于提高ASSB寿命和可靠性至关重要.
- 这项研究提供了对保护CAM和维护ASSB细胞完整性的基本见解.
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