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用于高性能电池的离子定聚合物盐固体电解质
Xueru Shi1, Yunpeng Zhong1, Yongqiang Yang2
1School of Materials Science and Engineering, Hunan Provincial Key Laboratory of Electronic Packaging and Advanced Functional Materials, Central South University, Changsha, Hunan, 410083, P. R. China.
Angewandte Chemie (International ed. in English)
|September 26, 2024
概括
这项研究引入了一种新的固体聚合物电解质用于可充电电池,通过防止树的生长来提高性能和安全性. 这种新型材料具有高导电性和机械强度,可提供稳定,持久的电池运行.
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
- 聚合物科学 聚合物科学
背景情况:
- 可充电电池 (ZBs) 面临水性电解质的挑战,包括树石的形成和有限的稳定性.
- 固体聚合物电解质 (SPEs) 提供了潜在的解决方案,但由于离子导电性低,机械强度差,离子输送效率低而难以应对.
研究的目的:
- 设计和合成一种新的聚合物盐固体电解质 (PISSE) 用于先进的ZBs.
- 为了增强离子导电性,机械性质和Zn2+转移数,同时抑制Zn树突.
主要方法:
- 使用聚烯二 (PAN),化 (ZnCl2) 和含氧空缺 (Nb2O5-x) 的氧氧化物制造PISSE.
- 离子导电性,机械性质,Zn2+转移数和界面稳定性的表征.
- 在各种条件下使用开发的PISSE对ZB进行电化学测试.
主要成果:
- 由于PAN矩阵和高ZnCl2度,PISSE实现了高离子导电性.
- 纳入Nb2O5-x改善了Zn2+溶解,机械强度和界面稳定性,产生了Zn2+转移数为~0.93.3.
- 经过优化后的PISSE表现出卓越的循环稳定性,广泛的温度范围 (-40°C至60°C) 和灵活性.
结论:
- 新的PISSE有效地解决了ZB的关键局限性,提供了一个有前途的固态电解质溶液.
- 材料设计为开发高性能,安全和耐用的可充电电池提供了途径.
- 这项工作突出了PISSEs在各种电化学储能应用中的潜力.
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