在硬碳上的聚合物诱导的固体电解质间相,使5C快充成为实际的离子囊细胞
Yu Sun1,2, Junjie Du1, Tianze Shi1,2
1College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, National Laboratory of Solid-State Microstructures, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
National science review
|February 13, 2026
概括
开发一种聚合物诱导的固体电解质间相 (SEI) 策略,使离子电池 (SIB) 能够快速充电. 这一突破允许Ah级SIB袋式电池在10分钟内实现充电,克服了以前的限制.
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 (SIB) 的快速充电受到硬碳 (HC) 阳极上的寄生反应和不稳定的固体电解质介相 (SEI) 的阻碍.
- 开发稳定的接口对于提高SIB性能和寿命至关重要.
研究的目的:
- 开发一种通用聚合物诱导的SEI战略,使快充SIBs成为可能.
- 研究功能化聚合物涂层在稳定HC电解质接口中的作用.
主要方法:
- 一个功能化的聚合物分子层,聚乙烯硫烯化物 (PESF),被涂在HC表面 (PolyHC) 上,以创建一个稳定的SEI.
- 用PESF层的极性-SO2F组来诱导离子丰富,并将融入SEI.
- 使用PolyHC阳极和NaNi1 / 3Fe1 / 3Mn1 / 3O2阴极组装了一个Ah级SIB囊细胞.
主要成果:
- PESF涂层产生了稳定的,大约5.0纳米的SEI混合聚合物和NaF,最大限度地减少了电解质分解.
- 聚合物骨架有效地稳定了无机SEI组件,确保快速充电期间的结构完整性.
- 组装的1.2Ah袋式电池表现出了卓越的快速充电能力 (不足10分钟) 和长期耐用性.
结论:
- 聚合物诱导的SEI战略提供了一种通用方法,以提高SIB的快速充电性能和稳定性.
- 这种方法为硬碳阳极的接口工程提供了一个新的视角,用于先进的储能应用.
- 与各种HC的兼容性表明下一代离子电池技术的广泛适用性.
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