Emerging Halide Superionic Conductors for All-Solid-State Batteries: Design, Synthesis, and Practical Applications

Hiram Kwak, Shuo Wang, Juhyoun Park, Yunsheng Liu, Kyu Tae Kim, Yeji Choi, Yifei Mo, Yoon Seok Jung

Research output: Contribution to journalReview articlepeer-review

26 Citations (Scopus)


Recently, halide superionic conductors have emerged as promising solid electrolyte (SE) materials for all-solid-state batteries (ASSBs), owing to their inherent properties combining high Li+conductivity, good chemical and electrochemical oxidation stabilities, and mechanical deformability, compared to sulfide or oxide SEs. In this Review, recent advances in halide Li+- and Na+-conducting SEs are comprehensively summarized. After introducing the ionic diffusion mechanism and related governing factors of the crystal structures, we discuss the design strategies, such as the substitution and synthesis protocols, of the halide materials for further improving their properties. We review theoretical and experimental results on electrochemical stabilities and compatibilities with electrode materials. Moreover, we offer a critical assessment of the challenges and issues associated with the development of practical ASSB applications, such as cost considerations, stabilities in atmospheric air, aqueous solutions, and slurry-processing, and the wet-slurry or dry fabrication of sheet-type electrodes (or SE membranes) for large-format ASSBs. Based on these discussions, we provide a perspective on the future research directions of halide SEs, emphasizing the need for expanding the materials space.

Original languageEnglish
Pages (from-to)1776-1805
Number of pages30
JournalACS Energy Letters
Issue number5
Publication statusPublished - 2022 May 13

Bibliographical note

Funding Information:
This work was supported by the Technology Development Program to Solve Climate Changes and by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Science, ICT & Future Planning (NRF-2018R1A2B6004996), by the Samsung Science and Technology Foundation under project no. SRFC-MA2102-03, by the Technology Innovation Program (20007045) funded by the Ministry of Trade, Industry & Energy (MOTIE), and by the Yonsei University Research Fund of 2021 (2021-22-0326). Y.M. acknowledges the funding support from National Science Foundation (1940166 and 2118838) and the computational facilities at the University of Maryland supercomputing resources and the Maryland Advanced Research Computing Center (MARCC).

Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.

All Science Journal Classification (ASJC) codes

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry


Dive into the research topics of 'Emerging Halide Superionic Conductors for All-Solid-State Batteries: Design, Synthesis, and Practical Applications'. Together they form a unique fingerprint.

Cite this