高性能三元固体聚合物电解质,基于高介电性聚 ((维尼利丁化物) 聚合物,用于固态离子电池
João C Barbosa1,2, Daniela M Correia3, Arkaitz Fidalgo-Marijuan4,5
1Physics Centre of Minho and Porto Universities (CF-UM-UP) and Laboratory of Physics for Materials and Emergent Technologies, LapMET, University of Minho 4710-057 Braga, Portugal.
ACS applied materials & interfaces
|June 28, 2023
概括
这项研究开发了用于离子电池的先进固体聚合物电解质 (SPEs),提高了安全性和性能. 该研究强调了选择特定的聚合物矩阵和离子液体,以获得最佳的能量存储解决方案的关键作用.
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:
- 高效的储能对于可再生能源来说至关重要.
- 离子电池 (LIB) 在安全性和循环稳定性方面面临着挑战.
- 固体聚合物电解质 (SPEs) 为传统液体电解质/分离器提供了一个有希望的替代品.
研究的目的:
- 开发和研究三元 SPEs,以提高 LIB 的表现.
- 评估不同聚合物矩阵 (PVDF-HFP,P(VDF-TrFE-CFE),填充剂 (clinoptilolite) 和离子液体 (ILs) 对SPE特性的影响.
- 为了证明P ((VDF-TrFE-CFE) 作为LIBs中的SPEs的主体聚合物的适用性.
主要方法:
- 使用医生刀片技术与溶剂蒸发制造三元SPE.
- 描述SPE形态,机械和电化学特性.
- 电化学测试包括离子导电性,电化学窗口,转移数和电荷-放电循环性能.
主要成果:
- 该PVDF-HFP-CPT-[PMPyr][TFSI] SPE实现了最高的离子导电率 (4.2 × 10−5 S cm−1) 和转移数 (0.59).
- 所有开发的SPEs都表现出卓越的电池性能,在C/10的50个周期后提供150mAhg-1的电池性能.
- 基于P ((VDF-TrFE-CFE) 的SPE表现出卓越的速率性能,在C速率下放电值为98.7 mAh g−1,表明增强的离子解离.
结论:
- 在固态LIB中选择聚合物矩阵,离子液体和盐对于优化三元SPE性能至关重要.
- P ((VDF-TrFE-CFE) 显示出作为SPE的宿主聚合物具有显著的潜力,改善了跨不同放电率的电池循环性.
- 该研究验证了ILs用于增强离子导电性的使用,并强调了P ((VDF-TrFE-CFE) 对于稳定的LIB操作的好处.
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