甲基酸MIDA (ADM) 作为电解质中的有效添加剂,以提高LiNi0.8Co0.15Al0.05O2电极的阴极电解质间层性能
Bo-Xun Chen1, Sanjaya Brahma1,2, Yu-Qi Chen3
1Department of Materials Science and Engineering, National Cheng Kung University, Tainan, 701, Taiwan.
Scientific reports
|June 20, 2023
概括
甲基酸MIDA Ester (ADM) 通过增强阴极稳定性和容量保留,显著提高离子电池性能. 这种添加剂保护LiNi$_{0.8}$Co$_{0.15}$Al$_{0.05}$O$_{2}$阴极,防止降解并确保更长的电池寿命.
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
- 电池技术 电池技术
背景情况:
- 离子电池 (LIB) 对于储能至关重要.
- 提高正极材料的稳定性是提高LIB性能和寿命的关键.
- LiNi_{0.8}$Co$_{0.15}$Al$_{0.05}$O$_{2}$ (LNCAO) 是一个有前途的阴极材料.
研究的目的:
- 评估甲基酸MIDA (ADM) 作为LNCAO阴极的电解质添加剂.
- 研究ADM对电化学和材料性能的影响.
- 了解ADM增强阴极性能的机制.
主要方法:
- 在40°C的电化学测试 (循环电压测量,静电循环)
- 福里埃变换红外光谱 (FTIR) 用于电解质分析.
- 传输电子显微镜 (TEM) 用于表面形态学.
- 操作同步射线X射线衍射 (XRD) 用于结构分析.
- 用X射线光电子光谱 (XPS) 检测表面构成.
主要成果:
- ADM添加剂显著改善了LNCAO阴极的循环稳定性,容量保留 (80%与20%相比) 和库伦比效率 (99.5%与90.4%相比).
- FTIR分析显示ADM抑制了电解质分解 (EC-Li^{+}$离子协调).
- TEM和XRD发现,ADM促进了稳定的阴极电解质接口 (CEI) 层,保持了阴极结构和表面完整性.
- XPS证实ADM可以抑制电解质分解.
结论:
- 甲基酸MIDA (ADM) 是一种有效的电解质添加剂,用于提高LNCAO阴极在LIBs中的性能.
- 通过形成保护CEI层和稳定阴极结构,ADM提高了电化学性能.
- 这项研究表明了开发更耐用,更高效的离子电池的可行策略.
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