双协调诱导的聚乙烯化物) /Li6.4Ga0.2La3Zr2O12/Succinonitrile复合物固体电解质 为了在全固态电池中提高速度性能
Shiyu Cao1,2, Fei Chen1,2, Qiang Shen1
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China.
ACS applied materials & interfaces
|July 27, 2023
概括
一种新的双重协调机制增强了全固态电池 (ASSLB) 的复合固体电解质. 这一突破改善了离子传输和界面稳定性,为先进的电池应用实现了更高的能量和功率密度.
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
- 固态电池 固态电池是什么
背景情况:
- 全固态电池 (ASSLB) 旨在实现高能量和功率密度.
- 与传统离子电池相比,ASSLB中的有限离子传输限制了它们的速率性能.
研究的目的:
- 为ASSLBs开发一种高性能复合体固体电解质.
- 通过使用一种新的双重协调机制来增强离子传输和界面稳定性.
主要方法:
- 使用聚乙烯化物/Li6.4Ga0.2La3Zr2O12/succinonitrile (PVDF/LLZO/SN) 构建了一个复合固体电解质.
- 为了修改电解质结构和特性,采用了涉及SN与LLZO和Li+的双协调机制.
主要成果:
- 通过双重协调,PVDF/LLZO/SN复合固体电解质证明了自由体积的提高和 SN 分子的固定.
- 复合电解质使ASSLB能够以高达6C的速度工作.
- LiFePO4/Li电池在4°C的50个循环后表现出96.4%的容量保留,并在0.5°C的500个循环后保持145.9 mAh g-1.
结论:
- 双重协调机制有效地提高了ASSLB的电化学性能和界面兼容性.
- 开发的复合体固体电解质显示出在下一代电池中具有高速率和长周期稳定性的巨大潜力.
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