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为高性能-电池增强的α-甲基组两聚 ((离子液体) 添加剂
Chen Wu1, Yifan Pan1, Yucong Jiao1
1State Key Laboratory of Advanced Fiber Materials, College of Chemistry and Chemical Engineering, Donghua University, Shanghai, 201620, China.
Angewandte Chemie (International ed. in English)
|March 16, 2025
概括
一种新型的聚合物添加剂PVEMA通过防止副作用和聚酸穿效应来增强水性- (Zn-I2) 电池. 这使得能量存储应用的循环稳定性和性能大大提高.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 水性- (Zn-I2) 电池对储能充满希望,但面临着挑战.
- 涉及金属和聚化穿效应的副作用限制了实际应用.
研究的目的:
- 开发一种聚合物添加剂,以减轻Zn-I2电池中的副作用和穿效应.
- 为了提高水性Zn-I2电池的循环稳定性和整体性能.
主要方法:
- 1-乙烯-3-乙烯基三甲硫酸盐 (VEImOTf) 和甲胺 (MAAm) 的共聚合,以制造PVEMA聚合物.
- 调查PVEMA的两性病性质和伊米达群相互作用.
- 用PVEMA在各种条件下测试对称Zn电池和Zn-I2电池.
主要成果:
- 对于调节的Zn2+扩散和溶解,PVEMA表现出两感性质.
- 来自MAAm的疏水性质减少了Zn金属的副作用反应; 伊米达群提供静电屏蔽.
- 经过PVEMA修改的对称Zn电池在20 mA cm-2下实现了超过400小时的循环稳定性,放电深度为77.7%.
- 带有PVEMA的Zn-I2电池在不同的电流密度和温度中表现出稳定的循环.
结论:
- PVEMA有效地减轻了水性Zn-I2电池中的副作用和穿效应.
- 开发的聚合物添加剂显著提高了电池循环稳定性和性能.
- 对于推进水性-电池技术,PVEMA提供了一个可行的解决方案.
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