Huang Genjie, Zhong Yu, Xia Xinhui, Wang Xiuli, Gu Changdong, Tu Jiangping
State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and School of Materials Science & Engineering, Zhejiang University, Hangzhou 310027, China.
State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and School of Materials Science & Engineering, Zhejiang University, Hangzhou 310027, China.
J Colloid Interface Sci. 2023 Feb 15;632(Pt A):11-18. doi: 10.1016/j.jcis.2022.11.048. Epub 2022 Nov 14.
Sulfide-based all-solid-state lithium batteries (ASSLBs) with high-voltage Ni-rich layered cathodes have shown great potential in energy storage systems. However, the application of ASSLBs is hindered by severe interface issues and poor solid-solid contact between cathodes and sulfide electrolytes. In this work, a suitably thin LiAlGe(PO) (LAGP) coating (0.41 mS cm) is introduced onto the surface of single-crystal LiNiCoMnO particles to mitigate interface side reactions. Subsequently, sheet-type electrodes are fabricated by the infiltration of LiGePS to fill the voids and achieve highly dense solid-solid contact, thus preventing contact loss. The LiGePS-infiltrated ASSLBs with a LAGP buffer layer display a high initial discharge capacity of 141.5 mAh g at 0.05 C and ultrastable cycling for 100 cycles at 0.1 C. An effective fabrication method for highly dense electrodes is proposed in this work, which provides a new direction for scalable industrial production.
具有高压富镍层状阴极的硫化物基全固态锂电池（ASSLBs）在储能系统中显示出巨大潜力。然而，ASSLBs的应用受到严重的界面问题以及阴极与硫化物电解质之间不良的固-固接触的阻碍。在这项工作中，在单晶LiNiCoMnO颗粒表面引入了适当厚度的LiAlGe(PO)（LAGP）涂层（0.41 mS cm），以减轻界面副反应。随后，通过渗透LiGePS来制造片状电极，以填充空隙并实现高度致密的固-固接触，从而防止接触损失。具有LAGP缓冲层的LiGePS渗透ASSLBs在0.05 C时显示出141.5 mAh g的高初始放电容量，并在0.1 C下进行100次循环具有超稳定的循环性能。这项工作提出了一种用于制造高密度电极的有效方法，为可扩展的工业生产提供了新方向。
