异质电解质层中锂枝晶生长行为原位观测分析研究

张芷豪; 安国博; 张扬; 樊倩霄; 张文堤; 王文卓; 刘凯; 李美成

doi:10.19799/j.cnki.2095-4239.2026.0292

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异质电解质层中锂枝晶生长行为原位观测分析研究

储能材料与器件 | 更新时间：2026-08-26

- 异质电解质层中锂枝晶生长行为原位观测分析研究
- In-situ observation and analysis of lithium dendrite growth behavior in heterogeneous electrolyte layers
- 储能科学与技术 2026年15卷第8期页码：2953-2962
- 作者机构：
  
  华北电力大学新能源学院，北京 102206
- 作者简介：
  
  张芷豪（2001—），男，硕士研究生，研究方向为硫化物固态电解质，E-mail：13372885177@163.com；
  李美成，教授，研究方向为锂/钠离子电池及储能技术，E-mail：mcli@ncepu.edu.cn。
- 基金信息：
  
  北京市自然科学基金(26JL001)
- DOI：10.19799/j.cnki.2095-4239.2026.0292
  中图分类号： TM 912
- 收稿：2026-04-03，
  
  修回：2026-05-18，
  
  网络首发：2026-08-26，
  
  纸质出版：2026-08-28
- 稿件说明：
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张芷豪, 安国博, 张扬, 等. 异质电解质层中锂枝晶生长行为原位观测分析研究[J]. 储能科学与技术, 2026, 15(8): 2953-2962.

ZHANG Zhihao, AN Guobo, ZHANG Yang, et al. In-situ observation and analysis of lithium dendrite growth behavior in heterogeneous electrolyte layers[J]. Energy Storage Science and Technology, 2026, 15(8): 2953-2962.
张芷豪, 安国博, 张扬, 等. 异质电解质层中锂枝晶生长行为原位观测分析研究[J]. 储能科学与技术, 2026, 15(8): 2953-2962. DOI： 10.19799/j.cnki.2095-4239.2026.0292.

ZHANG Zhihao, AN Guobo, ZHANG Yang, et al. In-situ observation and analysis of lithium dendrite growth behavior in heterogeneous electrolyte layers[J]. Energy Storage Science and Technology, 2026, 15(8): 2953-2962. DOI： 10.19799/j.cnki.2095-4239.2026.0292.

摘要

硫化物固态电解质是高比能全固态电池的重要候选材料，但锂枝晶穿透引发的短路仍是限制其实用化的关键问题。现有研究表明，在Li

5.5

4.5

1.5

（LPSC）中引入Li

GeP

（LGPS）中间层能够延缓枝晶贯穿现象的发生，不过关于其作用过程及界面调控机制的直接实验揭示仍然不足。本研究构建了可透光的超薄LPSC|LGPS双拼微电池，实现了对枝晶跨硫化

物异质界面生长的同步光学-电化学追踪。结果表明，锂枝晶在LPSC中易沿单一优势路径持续生长；当其到达LPSC|LGPS界面后，其持续前向生长转变为界面停滞并沿界面扩展，同时伴随通路等效电阻升高。进一步研究表明，当优势枝晶前沿接触LGPS后，界面反应引起的局部高阻产物的累积会分走原本集中于该枝晶尖端的电流，削弱其持续向前生长的优势，并在多沉积点条件下促使电流向其他低阻通路转移，从而形成被动负反馈式电流再分配。该研究为LGPS中间层抑制枝晶贯穿提供了直接的原位观测证据，并揭示了其可能依赖于界面反应诱导的局部增阻和尖端电流分流协同作用的调控机制，为硫化物固态电解质中间层设计和枝晶抑制提供了新的认识。

Abstract

Sulfide solid-state electrolytes are promising candidates for high-specific-energy all-solid-state batteries; however

short circuits caused by lithium dendrite penetration remain a critical barrier to practical application. Previous studies have shown that incorporating a Li

GeP

(LGPS) interlayer within Li

5.5

4.5

1.5

(LPSC) can delay dendrite propagation

but direct experimental clarification of the dynamic process and interfacial regulation mechanism is still insufficient. In this work

a light-transmissive ultrathin LPSC-LGPS bilayer microbattery was constructed to enable synchronous optical-electrochemical tracking of lithium dendrite growth across heterogeneous sulfide interfaces. The results show that lithium dendrites tend to propagate along a single dominant pathway within LPSC. Upon reaching the LPSC-LGPS interface

continuous forward growth is replaced by interfacial stagnation and lateral spreading

accompanied by increasing equivalent pathway resistance. Further investigation reveals that when the leading dendrite front contacts LGPS

the progressive accumulation of high-resistance decomposition products induced by interfacial reactions diverts the current originally concentrated at the dendrite tip. This weakens its kinetic advantage for continued forward growth and promotes current redistribution toward alternative low-resistance pathways under multisite deposition conditions

thereby establishing a passive negative-feedback current redistribution mechanism. This study provides direct

in situ

observational evidence for the suppression of dendr

ite penetration by LGPS interlayers and reveals a regulation mechanism that may depend on the synergistic interplay between reaction-induced local resistance buildup and tip current shunting

offering new insights into functional interlayer design and dendrite mitigation strategies for sulfide-based solid-state electrolytes.

关键词

Keywords

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