通过在以为基础的电解质中对硬碳阳极进行有针对性的功能调节来调节相间化学,用于高性能离子电池
Guangxiang Zhang1, Chuankai Fu1, Shuyang Gao1
1State Key Laboratory of Space Power-Sources, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China.
Angewandte Chemie (International ed. in English)
|January 29, 2025
概括
研究人员修改了硬碳阳极,以防止离子电池中的寄生反应. 这一策略创造了一个稳定的接口,显著提高了电池性能和寿命.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 在离子电池中的商业硬碳 (HC) 阳极面临挑战,因为表面氧功能组和以为基础的电解质之间的寄生反应.
- 这些反应导致不稳定的间相,阻碍了电池的性能和循环寿命.
研究的目的:
- 为了调节硬碳阳极的相间化学反应.
- 为了提高离子电池的稳定性和循环耐用性,使用以为基础的电解质.
主要方法:
- 在硬碳表面定制功能组,将不必要的氧功能组转化为Si-O-Si分子层.
- 构建一个无机/有机混合固体电解质间相 (SEI).
主要成果:
- 经过修改的HC阳极在0.5 A g-1.1时实现了206.2 mAh g-1的速率能力.
- 在1.0 A g-1.1的1000个循环后,证明了92.5%的显著容量保留.
- 一个带有Na2Fe[Fe(CN) 6阴极的全电池在1C的800个循环后保持了80.9%的容量.
结论:
- 开发的界面修饰策略有效调节相间化学.
- 这种方法为硬碳阳极在以为基础的电解质的离子电池中的实际应用提供了一个有前途的途径.
更多相关视频
相关概念视频
Ion Exchange
532
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
532
Batteries and Fuel Cells
26.9K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
26.9K


