journal article·2026-06-22

Bulk Na + Transport and Interfacial Stability in Inorganic Solid Electrolytes for All-Solid-State Sodium-Metal Batteries

Zeling Wu, Yaoda Wang, Xiaohui Li, Ligang Wang, Zhong Jin, Xiaojun Kuang

Publisher page

Abstract

All-solid-state sodium-metal batteries (ASS-SMBs) are promising for safe, sustainable energy storage, but their advancement requires solid electrolytes that combine fast bulk Na + transport with stable interfaces, two factors that are intrinsically coupled. This review presents a descriptor-based perspective on sodium-ion conduction across major inorganic electrolyte families, including oxides, sulfides, halides, anti-perovskites, and complex hydrides. We emphasize how crystal structure, defect chemistry, lattice dynamics, and grain-boundary characteristics govern migration pathways, transport heterogeneity, and interfacial evolution. We then examine the origins of key interfacial challenges, such as space-charge effects, contact loss, interphase instability, and dendrite initiation and relate them to bulk transport descriptors across different electrolyte systems. Finally, we summarize current design and interface-engineering strategies and propose cross-family design rules for developing practical inorganic solid electrolytes for ASS-SMBs.
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Research context

OpenAlex topics: Thermal Expansion and Ionic Conductivity · Advanced Battery Materials and Technologies · Advancements in Battery Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering

Guilin University of Technology

State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Green Energy Catalysis and Intelligent Chemical Engineering, Suzhou Key Laboratory of Green Intelligent Manufacturing of New Energy Materials and Devices, Tianchang New Materials and Energy Technologies Research Center, Institute of Green Chemistry and Engineering, School of Chemistry and Chemical Engineering

Nanjing University

Institute of Molecular Plus

Tianjin University

National Industry-Education Platform for Energy Storage

Future Energy Interdisciplinary Center, Key Laboratory of Solid-State Energy Conversion and Storage of Jiangxi Education Department, School of Intelligent Manufacturing and Future Energy

Gannan Normal University

Funding

China National Petroleum Corporation · Guilin University of Technology · Transformation Program of Scientific and Technological Achievements of Jiangsu Province · Ministry of Education of the People's Republic of China · National Key Research and Development Program of China · Guangxi Key Research and Development Program · Natural Science Foundation of Jiangsu Province · Natural Science Foundation of Guangxi Zhuang Autonomous Region · Nanjing University · Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China · Jiangsu Province · Beijing-Tianjin-Hebei Fundamental Research Cooperation Project · Suzhou Laboratory · Chenzhou National Sustainable Development Agenda Innovation Demonstration Zone Provincial Special Project · Suzhou City

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