锂镧钛氧（LLTO）固态电解质复杂微观结构研究进展

赵丽君; 年瑶; 韩优

doi:10.11949/0438-1157.20260527

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锂镧钛氧（LLTO）固态电解质复杂微观结构研究进展

综述与专论 | 更新时间：2026-08-04

- 锂镧钛氧（LLTO）固态电解质复杂微观结构研究进展
- Research Progress on Complex Microstructure of Lithium Lanthanum Titanate (LLTO) Solid Electrolytes
- 化工学报 2026年
- 作者机构：
  
  1.天津大学化工学院，天津300072
  2.天津市物质绿色创造与制造海河实验室，天津300192
  3.化学工程与低碳技术全国重点实验室，天津300350
- 作者简介：
  
  赵丽君（2002—），女，硕士研究生，2024207042@tju.edu.cn
  年瑶（1993—），女，博士，副研究员，ynian@tju.edu.cn
  韩优（1981—），女，博士，教授，yhan@tju.edu.cn
- 基金信息：
  
  国家自然科学基金项目(22508290;T2441001);天津市自然科学基金青年项目(24JCQNJC01140);国家重点研究计划项目(2024ZD1200303)
- DOI：10.11949/0438-1157.20260527
  中图分类号： TM 911
- 收稿：2026-04-14，
  
  修回：2026-08-04，
  
  录用：2026-08-04，
- 稿件说明：
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赵丽君, 年瑶, 韩优. 锂镧钛氧（LLTO）固态电解质复杂微观结构研究进展[J/OL]. 化工学报, 2026.

ZHAO Lijun, NIAN Yao, HAN You. Research Progress on Complex Microstructure of Lithium Lanthanum Titanate (LLTO) Solid Electrolytes[J/OL]. CIESC Journal, 2026.
赵丽君, 年瑶, 韩优. 锂镧钛氧（LLTO）固态电解质复杂微观结构研究进展[J/OL]. 化工学报, 2026. DOI： 10.11949/0438-1157.20260527.

ZHAO Lijun, NIAN Yao, HAN You. Research Progress on Complex Microstructure of Lithium Lanthanum Titanate (LLTO) Solid Electrolytes[J/OL]. CIESC Journal, 2026. DOI： 10.11949/0438-1157.20260527.

摘要

锂镧钛氧（Li

2/3-x

TiO

，简称LLTO）作为典型钙钛矿型氧化物固态电解质，凭借室温下高达约1×10

-3

S/cm 的优异体相离子电导率与出色的环境稳定性，成为下一代全固态锂离子电池（ASSLBs）核心候选材料之一。但实际应用中，LLTO 材料的结构远偏离理想模型，多晶 LLTO 的总离子电导率较体相电导率低2~3个数量级，严重制约其产业化应用。本文系统综述 LLTO 的晶体结构特征与锂离子迁移机制，重点阐释合成与应用过程中产生的各类微观结构缺陷的结构特征及其对离子传输性能的影响，全面总结晶格工程、晶界工程与界面工程等缺陷精准调控策略的最新研究进展，旨在为高性能 LLTO 基固态电解质的设计、制备与优化提供理论支撑与研究方向。

Abstract

Lithium lanthanum titanate (Li

2/3-x

TiO

hereafter designated LLTO)

a prototypical perovskite-type oxide solid electrolyte

has garnered considerable attention as a prime candidate for next-generation all-solid-state l

ithium-ion batteries (ASSLBs) on account of its outstanding bulk ionic conductivity of approximately 1 × 10

-3

 S/cm at ambient temperature and its remarkable environmental resilience. In practical implementations

however

the actual structure of LLTO deviates substantially from the ideal crystallographic model

and the total ionic conductivity of polycrystalline LLTO is typically two to three orders of magnitude inferior to its bulk counterpart—a disparity that severely impedes its industrial adoption. This article presents a systematic overview of the crystal structural attributes and lithium-ion migration mechanisms intrinsic to LLTO

with particular emphasis on delineating the structural characteristics of diverse microstructural imperfections that arise during synthesis and service

along with their consequential influence on ionic transport behavior. Moreover

the review consolidates recent advancements in precision defect-manipulation methodologies—spanning lattice engineering

grain boundary engineering

and interface engineering-with the aim of furnishing a robust theoretical foundation and charting prospective research trajectories for the design

fabrication

and refinement of high-performance LLTO-based solid electrolytes.

关键词

Keywords

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