具有快速+的水溶性聚胺酸结合剂,用于离子电池中氧化阳极的转移动力学
Jian Li1,2, Kai Yang1, Yun Zheng1
1Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education), Jianghan University, Wuhan 430056, China.
ACS applied materials & interfaces
|June 20, 2023
概括
一种新的水溶性聚胺酸 (WS-PAA) 结合剂通过改善循环和速率能力来增强子氧化 (SiO) 阳极. 这种粘合剂提供了更好的机械强度和离子传输,克服了商业应用中的挑战.
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
- 纳米技术 纳米技术
背景情况:
- 子氧化 (SiO) 阳极显示出对电池的希望,这是由于其比 (Si) 阳极更优越的循环和速率性能.
- 在SiO阳极中,高体积膨胀对结合剂的发展和电极的稳定性提出了挑战.
研究的目的:
- 合成和评估一种新的水溶性聚胺酸 (WS-PAA) 结合剂,用于SiO阳极.
- 调查离子键和键在WS-PAA中的作用,以提高电极性能.
主要方法:
- 使用三胺 (TEA) 合成一种水溶性聚胺酸 (WS-PAA) 结合剂.
- 使用WS-PAA粘合剂制造SiO极的制造和电化学测试.
- 分析电极机械强度和Li+运输特性.
主要成果:
- WS-PAA结合剂与SiO形成稳定的键,提供机械完整性.
- WS-PAA中的离子键增强了水溶性,并创建了Li+运输通道.
- 使用WS-PAA的SiO阳极实现了1004.7 mAh·g-1的初始容量,并在200个循环后保持84.9%.
结论:
- WS-PAA是SiO极的高效粘合剂,性能优于CMC和SA等传统粘合剂.
- WS-PAA的独特特性解决了SiO极的体积扩张挑战.
- WS-PAA 显示了先进电池技术的商业化巨大潜力.
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