{"title":"Enhanced Interfacial Conduction in Low-Cost NaAlCl4 Composite Solid Electrolyte for Solid-State Sodium Batteries","authors":"Erick Ruoff, Steven Kmiec, Arumugam Manthiram","doi":"10.1002/aenm.202402091","DOIUrl":null,"url":null,"abstract":"All-solid-state sodium batteries offer the advantage of both sustainability and safety. Solid-state electrolytes play a key role, and an oxygen-incorporated NaAlCl<sub>4</sub> composite electrolyte is presented with a high ambient-temperature ionic conductivity of > 0.1 mS cm<sup>−1</sup>. The electrolyte synthesized with a mechanochemical reaction consists of in situ-formed Al<sub>2</sub>O<sub>3</sub> nanoparticles that provide enhanced conduction through an oxychloride phase at the interface. Magic angle spinning nuclear magnetic resonance spectroscopy confirms the formation of Al<sub>2</sub>O<sub>3</sub> and the oxychloride phases at the interface and sheds insights into the origin of the enhanced ionic conductivity of the composite electrolyte. Additionally, simply adding Al<sub>2</sub>O<sub>3</sub> nanoparticles to NaAlCl<sub>4</sub> before mechanochemical synthesis is investigated, and a relationship between Al<sub>2</sub>O<sub>3</sub> surface area and composite electrolyte ionic conductivity is identified. All-solid-state sodium batteries assembled with the composite electrolyte demonstrate a high specific capacity of 124 mA h g<sup>−1</sup>, clearly outperforming the baseline NaAlCl<sub>4</sub> electrolyte. Furthermore, X-ray photoelectron spectroscopy is utilized to understand the origin of capacity fade and obtain insights into electrolyte decomposition products. This work provides a deeper understanding of methods for boosting the ion transport in a low-cost halide solid electrolyte for practical viability of all-solid-state sodium batteries.","PeriodicalId":111,"journal":{"name":"Advanced Energy Materials","volume":null,"pages":null},"PeriodicalIF":24.4000,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Energy Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/aenm.202402091","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
All-solid-state sodium batteries offer the advantage of both sustainability and safety. Solid-state electrolytes play a key role, and an oxygen-incorporated NaAlCl4 composite electrolyte is presented with a high ambient-temperature ionic conductivity of > 0.1 mS cm−1. The electrolyte synthesized with a mechanochemical reaction consists of in situ-formed Al2O3 nanoparticles that provide enhanced conduction through an oxychloride phase at the interface. Magic angle spinning nuclear magnetic resonance spectroscopy confirms the formation of Al2O3 and the oxychloride phases at the interface and sheds insights into the origin of the enhanced ionic conductivity of the composite electrolyte. Additionally, simply adding Al2O3 nanoparticles to NaAlCl4 before mechanochemical synthesis is investigated, and a relationship between Al2O3 surface area and composite electrolyte ionic conductivity is identified. All-solid-state sodium batteries assembled with the composite electrolyte demonstrate a high specific capacity of 124 mA h g−1, clearly outperforming the baseline NaAlCl4 electrolyte. Furthermore, X-ray photoelectron spectroscopy is utilized to understand the origin of capacity fade and obtain insights into electrolyte decomposition products. This work provides a deeper understanding of methods for boosting the ion transport in a low-cost halide solid electrolyte for practical viability of all-solid-state sodium batteries.
期刊介绍:
Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small.
With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics.
The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.