Wang Jin, Liao Yunlong, Wu Xi, Ye Lingfeng, Wang Zixi, Wu Fugen, Lin Zhiping
School of Materials and Energies, Guangdong University of Technology, Guangzhou 510006, China.
School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Nanomaterials (Basel). 2024 Feb 27;14(5):433. doi: 10.3390/nano14050433.
Solid-state lithium metal batteries (LMBs) have been extensively investigated owing to their safer and higher energy density. In this work, we prepared a novel elastic solid-state polymer electrolyte based on an in situ-formed elastomer polymer matrix with ion-conductive plasticizer crystal embedded with LiLaZrTaO (LLZTO) nanoparticles, denoted as LZT/SN-SPE. The unique structure of LZT/SN-SPE shows excellent elasticity and flexibility, good electrochemical oxidation tolerance, high ionic conductivity, and high Li transference number. The role of LLZTO filler in suppressing the side reactions between succinonitrile (SN) and the lithium metal anode and propelling the Li diffusion kinetics can be affirmed. The Li symmetric cells with LZT/SN-SPE cycled stably over 1100 h under a current density of 5 mA cm, and Li||LiFePO cells realized an excellent rate (92.40 mAh g at 5 C) and long-term cycling performance (98.6% retention after 420 cycles at 1 C). Hence, it can provide a promising strategy for achieving high energy density solid-state LMBs.
固态锂金属电池（LMBs）因其更高的安全性和能量密度而受到广泛研究。在本工作中，我们基于原位形成的弹性体聚合物基体，制备了一种新型弹性固态聚合物电解质，其中嵌入了含有LiLaZrTaO（LLZTO）纳米颗粒的离子导电增塑剂晶体，记为LZT/SN-SPE。LZT/SN-SPE的独特结构表现出优异的弹性和柔韧性、良好的电化学氧化耐受性、高离子导电性和高锂迁移数。可以确定LLZTO填料在抑制丁二腈（SN）与锂金属负极之间的副反应以及推动锂扩散动力学方面的作用。采用LZT/SN-SPE的锂对称电池在5 mA cm的电流密度下稳定循环超过1100小时，Li||LiFePO电池实现了优异的倍率性能（5 C时为92.40 mAh g）和长期循环性能（1 C下420次循环后保持率为98.6%）。因此，它可为实现高能量密度固态LMBs提供一种有前景的策略。
