中文版 | English
Title

Na-K Alloy Anode for High-Performance Solid-State Sodium Metal Batteries

Author
Corresponding AuthorMeng Gu
Joint first authorYifeng Cheng; Menghao Li
Publication Years
2022-12-01
DOI
Source Title
ISSN
1530-6984
EISSN
1530-6992
Abstract

Rechargeable solid-state Na metal batteries (SSNMB) can offer high operational safety and energy density. However, poor solid–solid contact between the electrodes and the electrolyte can dramatically increase interfacial resistance and Na dendrite formation, even at low current rates. Therefore, we developed a carbon-fiber-supported liquid Na–K alloy anode that ensures close anode–electrolyte contact, enabling superior cycle stability and rate capability. We then demonstrated the first cryogenic transmission electron microscopy (cryo-TEM) characterization of an SSNMB, capturing the evolution of solid–electrolyte interphase (SEI) and revealing both crystalline and amorphous phases, which could facilitate ion transport and prevent continuous side reactions. By enhancing contact between the Na–K alloy and solid-state electrolyte, these symmetric cells are capable of cycling for over 800 h without notable increased polarization and enable an unprecedented critical current density (CCD) at 40 mA cm–2. Our liquid Na–K alloy approach offers a promising strategic avenue toward commercial SSNMBs.

Keywords
URL[Source Record]
Indexed By
Language
English
Important Publications
NI Journal Papers
SUSTech Authorship
First
Funding Project
National Science Foundation of China[52273225] ; Shenzhen fundamental research funding[
WOS Research Area
Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS Subject
Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS Accession No
WOS:000892632100001
Publisher
ESI Research Field
MATERIALS SCIENCE
Data Source
人工提交
Publication Status
在线出版
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/416238
DepartmentDepartment of Materials Science and Engineering
Affiliation
1.Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
2.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
3.Graphene Composite Research Center, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
4.School of Material Science and Engineering, Dongguan University of Technology, Dongguan 523413, China
First Author AffilicationDepartment of Materials Science and Engineering
Corresponding Author AffilicationDepartment of Materials Science and Engineering
First Author's First AffilicationDepartment of Materials Science and Engineering
Recommended Citation
GB/T 7714
Yifeng Cheng,Menghao Li,Xuming Yang,et al. Na-K Alloy Anode for High-Performance Solid-State Sodium Metal Batteries[J]. NANO LETTERS,2022.
APA
Yifeng Cheng.,Menghao Li.,Xuming Yang.,Xinzhen Lu.,Duojie Wu.,...&Meng Gu.(2022).Na-K Alloy Anode for High-Performance Solid-State Sodium Metal Batteries.NANO LETTERS.
MLA
Yifeng Cheng,et al."Na-K Alloy Anode for High-Performance Solid-State Sodium Metal Batteries".NANO LETTERS (2022).
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