球形ZrO2纳米陶瓷增强P(VDF-HFP)- pvac基复合固体聚合物电解质在锂离子电池中的电化学性能

IF 2.2 4区 化学 Q2 Engineering
J. H. Rakini Chanderasekaran, Lija Arun, Jagadeesan Arumugam, Sasikumar Moorthy, Karthikeyan Kesavan, John Samuel Ayyamperumal, Vijayashree Selvam
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引用次数: 0

摘要

固体聚合物电解质(spe)是一种很有前途的替代品,与液体电解质相比,它具有提高能量密度和安全性等优点。然而,离子电导率低、机械强度差、界面接触弱以及电极金属腐蚀仍然是spe的关键问题。本文采用标准溶液铸造技术,将P(VDF-HFP)-PVAc-LiTFSI-EC[聚偏氟乙烯-六氟丙烯]-聚醋酸乙烯-二氟甲烷磺酰锂-碳酸乙烯]与水热衍生球形ZrO2纳米晶(nc)作为被动陶瓷填料,制备了复合固体聚合物电解质(CSPE)。值得注意的是,与不含ZrO2 NC的SPE相比,在CSPE中加入5wt% ZrO2 NC导致离子电导率显著提高三倍。这种改进主要归因于球形ZrO2 NC促进了Li+的迁移通道和固定了自由阴离子,可能是通过抑制CSPE的结晶度和Lewis酸碱性质。此外,CSPE具有较高的机械强度;优异的热稳定性;宽电化学窗口;和良好的电解质亲和力。这种有前途的材料非常适合为各种应用开发坚固高效的电解质。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Enhanced electrochemical performance of P(VDF-HFP)-PVAc-based composite solid polymer electrolytes with spherical shape ZrO2 nanoceramic for lithium-ion battery applications

Solid polymer electrolytes (SPEs) are a promising substitute, offering splendid benefits such as improved energy density and safety compared to liquid electrolytes. However, low ionic conductivity, poor mechanical strength, weak interfacial contact, and electrode metal corrosion may still be critical problems in SPEs. Here, a composite solid polymer electrolyte (CSPE) is prepared using the standard solution casting technique, incorporating P(VDF-HFP)-PVAc-LiTFSI-EC [poly(vinylidene fluoride-hexafluoro propylene)-poly(vinyl acetate)-lithium bis-trifluoromethanesulfonylimide-Ethylene carbonate] with hydrothermally derived spherical shape ZrO2 nanocrystals (NCs) as a passive ceramic filler. Notably, incorporating 5wt% ZrO2 NC in the CSPE leads to a notable threefold time increase in ionic conductivity compared to the SPE without ZrO2 NC. This improvement is mainly attributed to spherical shape ZrO2 NC facilitating Li+ migration channels and immobilizing free anions, likely by suppressing the crystallinity of the CSPE and its Lewis acid–base nature. Additionally, CSPE demonstrates high mechanical strength; excellent thermal stability; a wide electrochemical window; and favorable electrolyte affinity. This promising material is well-suited for developing robust and efficient electrolytes for various applications.

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来源期刊
Chemical Papers
Chemical Papers Chemical Engineering-General Chemical Engineering
CiteScore
3.30
自引率
4.50%
发文量
590
期刊介绍: Chemical Papers is a peer-reviewed, international journal devoted to basic and applied chemical research. It has a broad scope covering the chemical sciences, but favors interdisciplinary research and studies that bring chemistry together with other disciplines.
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