解锁链长度和终端组对乙烯糖醇乙太家族的影响 向先进的水性电解质
Kang Xiao1,2, Liming Yang1, Mengke Peng1
1College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry (IPEC)/Jiangxi Provincial Key Laboratory of New Energy Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang, 330031, China.
研究人员开发了先进的混合电解质,使用量身定制的辅溶剂分子来进行卓越的能量储存. 优化的电解质增强了超级电容器的电压和循环寿命,展示了下一代电池和设备的潜力.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 高性能混合电解质对于先进的水性电化学能量储存至关重要.
- 了解辅溶剂的添加剂分子结构如何影响电解质性质是关键的,但发展不足.
- 这限制了用于储能应用的有效混合电解质的开发.
研究的目的:
- 为了研究乙烯基醇衍生物作为辅溶剂添加剂对混合电解质特性的影响.
- 优化混合电解质,以提高超级电容器和电池的性能.
- 为先进的混合电解质建立一个分子设计策略.
主要方法:
- 合成了一系列混合电解质,使用具有不同链长度和终端组的乙烯基甘醇.
- 使用开发的电解质,描述了超级电容器 (SC) 和离子电池的电化学性能.
- 评估了长期循环稳定性,工作电压和低温性能.
主要成果:
- 优化的2米LiTFSI-90%二乙烯基醇二甲基乙烯 (DDm) 混合电解质通过抑制水活动,显著提高了SC工作电压到2.5V.
- 优化的电解质使SCs能够实现5万个周期,具有92.3%的电容保持率和出色的低温性能 (-40°C).
- 一个Zn//多亚尼林全细胞与2m Zn(OTf) 2-90%的DDm电解质证明了77.9%的容量保留2000个循环后与无树突的Zn阳极.
结论:
- 定制辅助溶剂分子结构是设计高性能混合电解质的有效策略.
- 开发的基于DDm的混合电解质为储能设备提供了增强的电压,稳定性和低温性能.
- 这项研究提供了一种新的分子设计方法,用于推进水性电化学能量存储系统.
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