A simple method for selecting suitable sintering aids for LZP-based ceramic electrolytes to improve lithium-ion conductivity

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2026-07-01 Epub Date: 2026-01-29 DOI:10.1016/j.jeurceramsoc.2026.118187

Xingrui Pu , Xing Cheng , Ruize Yang , Chengzhi Wei , Xinhang Chu , Xiaohong Zhu

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引用次数: 0

Abstract

The large grain boundary resistance restricts conductivity of LiZr₂(PO₄)₃ (LZP) ceramic electrolyte. This work presents an effective and simple screening technique for quickly screening out appropriate sintering aids to overcome this disadvantage. Firstly, Bi₂O₃ (BO), Li₃BO₃ (LBO) and LiBF₄ (LBF) were selected from fourteen candidates as sintering aids for Li_0.94Zr_1.94Ta_0.06(PO₄)₃ (LZTP) electrolyte. The correlations between phase, relative density, microstructure, composition and conductivity are discussed. The total conductivity of LZTP-0.5 wt%LBO is 8.60 × 10⁻⁵ S cm⁻¹. LZTP-2wt%BO reaches the highest conductivity of 9.24 × 10⁻⁵ S cm⁻¹, which is approximately 1.5 times that of pure LZTP. The reason for the total conductivity enhancement is mainly attributed to the enhancement of grain boundary transport. However, compared to BO and LBO, the LBF sintering aid exhibited negative effects on conductivity. The lithium symmetrical cell equipped with LZTP-2wt%BO exhibits a long cycle stability for 900 h. This screening strategy can provide reference and inspiration for the selection of sintering aids for other LZP-based ceramic electrolytes.

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一种简单的方法选择合适的助烧结剂，以提高lzp基陶瓷电解质的锂离子电导率

较大的晶界电阻限制了lizzr2 (PO4)3 （LZP）陶瓷电解质的导电性。这项工作提出了一种有效和简单的筛选技术，可以快速筛选出合适的烧结助剂，以克服这一缺点。首先，从14种候选材料中选择Bi2O3 （BO）、Li3BO3 （LBO）和LiBF4 （LBF）作为Li0.94Zr1.94Ta0.06(PO4)3 （LZTP）电解质的助烧剂。讨论了相、相对密度、显微组织、成分和电导率之间的关系。LZTP-0.5 wt%LBO的总电导率为8.60 × 10−5 S cm−1。LZTP-2wt%BO的电导率最高，为9.24 × 10−5 S cm−1，约为纯LZTP的1.5倍。总电导率增强的主要原因是晶界输运的增强。但与BO和LBO相比，LBF助烧剂对电导率有负面影响。LZTP-2wt%BO的锂对称电池具有900 h的长周期稳定性。该筛选策略可为其他lzp基陶瓷电解质助烧剂的选择提供参考和启示。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.