皇冠以太电解质添加剂使离子电池的高速率和稳定的聚生物阴极材料成为可能
Zhiyang Xue1, Yun Chen1, Kangjie Xu1
1State Key Laboratory of Materials-Oriented Chemical Engineering, Jiangsu Collaborative Innovation Center for Advanced Inorganic Functional Composites, College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 211816, China.
研究人员开发了一种有机阴极材料,聚丁二化物 (PBVCl2),用于离子电池 (CIB). 添加18-Crown-6显著改善了速度能力和循环稳定性,提高了能量密度和性能.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 离子电池 (CIB) 面临着阴极材料的挑战,包括低速率能力和循环稳定性.
- 现有的无机和有机阴极材料用于CIBs通常表现出有限的性能.
研究的目的:
- 开发用于CIB的高性能阴极材料.
- 为了提高CIB的速度能力和循环稳定性,使用有机阴极和电解质添加剂.
主要方法:
- 聚乙二化物 (PBVCl2) 有机阴极材料的合成.
- 将18-Crown-6添加到基于化的电解质中.
- 电化学测试用于评估容量,速率性能和循环稳定性.
- 富里埃变换红外光谱学和X射线光电子光谱学研究电极反应机制.
主要成果:
- 使用18-Crown-6添加剂的PBVCl2阴极显著提高了容量,在0.1°C时从149.4mAhg-1增加到179.1mAhg-1,在10°C时从57.8mAhg-1增加到111.9mAhg-1.
- 添加18-Crown-6提升了充电传输,离子传输和接口稳定性,从而提高了电池性能.
- 与其他报告的CIB阴极相比,开发的CIB显示出更高的速率性能和能量密度.
- 在120个循环后,容量保留超过了两倍,这表明循环稳定性得到了改善.
结论:
- 由18-Crown-6增强的有机PBVCl2阴极材料为高性能CIB提供了一个有前途的解决方案.
- 该研究揭示了电极反应机制涉及高度可逆的离子转移.
- 这项工作为可充电电池中的先进有机电极材料铺平了道路.
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