Mechanochemical Synthesis of Potassium–Ion Conductor K3SbS4
Antimony-based sulfide solid electrolytes exhibit high conductivity for alkaline cations. In this study, we synthesized K3SbS4 potassium-ion conductors using the mechanochemical method for the nominal compositions with x mol% excess K2S (x = 0, 5, 10, and 15) to compensate for the chemical impuritie...
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| Format: | Article |
| Language: | English |
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The Electrochemical Society of Japan
2025-07-01
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| Series: | Electrochemistry |
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| Online Access: | https://www.jstage.jst.go.jp/article/electrochemistry/93/7/93_25-00082/_html/-char/en |
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| _version_ | 1839617200197992448 |
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| author | Takehiro NAKAO Chihiro OKUSHIMA Takuya KIMURA Akira NASU Kota MOTOHASHI Atsushi SAKUDA Akitoshi HAYASHI |
| author_facet | Takehiro NAKAO Chihiro OKUSHIMA Takuya KIMURA Akira NASU Kota MOTOHASHI Atsushi SAKUDA Akitoshi HAYASHI |
| author_sort | Takehiro NAKAO |
| collection | DOAJ |
| description | Antimony-based sulfide solid electrolytes exhibit high conductivity for alkaline cations. In this study, we synthesized K3SbS4 potassium-ion conductors using the mechanochemical method for the nominal compositions with x mol% excess K2S (x = 0, 5, 10, and 15) to compensate for the chemical impurities in the K2S reagent. The mechanochemically prepared samples showed X-ray diffraction patterns similar to β-K3SbS4 in all the compositions. Raman bands attributed to the SbS43− unit were observed in all the samples. The ionic conductivities at 25 °C showed a positive correlation with increasing x, reaching a maximum ionic conductivity of 3.6 × 10−6 S cm−1 at 10 mol% excess K2S. Subsequent heat-treatment further enhanced the ionic conductivity, achieving 1.2 × 10−5 S cm−1 at 25 °C. This improvement is attributed to the nominal composition being close to that of K3SbS4 by adjusting the excess amount of K2S and the increased crystallinity of β-K3SbS4. |
| format | Article |
| id | doaj-art-f70bf8fa4f504e7aaa9ea04e82c549f2 |
| institution | Matheson Library |
| issn | 2186-2451 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | The Electrochemical Society of Japan |
| record_format | Article |
| series | Electrochemistry |
| spelling | doaj-art-f70bf8fa4f504e7aaa9ea04e82c549f22025-07-25T02:53:56ZengThe Electrochemical Society of JapanElectrochemistry2186-24512025-07-0193707700507700510.5796/electrochemistry.25-00082electrochemistryMechanochemical Synthesis of Potassium–Ion Conductor K3SbS4Takehiro NAKAO0Chihiro OKUSHIMA1Takuya KIMURA2Akira NASU3Kota MOTOHASHI4https://orcid.org/0000-0001-9318-7588Atsushi SAKUDA5https://orcid.org/0000-0002-9214-0347Akitoshi HAYASHI6https://orcid.org/0000-0001-9503-5561Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan UniversityDepartment of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan UniversityDepartment of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan UniversityDepartment of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan UniversityDepartment of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan UniversityDepartment of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan UniversityDepartment of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan UniversityAntimony-based sulfide solid electrolytes exhibit high conductivity for alkaline cations. In this study, we synthesized K3SbS4 potassium-ion conductors using the mechanochemical method for the nominal compositions with x mol% excess K2S (x = 0, 5, 10, and 15) to compensate for the chemical impurities in the K2S reagent. The mechanochemically prepared samples showed X-ray diffraction patterns similar to β-K3SbS4 in all the compositions. Raman bands attributed to the SbS43− unit were observed in all the samples. The ionic conductivities at 25 °C showed a positive correlation with increasing x, reaching a maximum ionic conductivity of 3.6 × 10−6 S cm−1 at 10 mol% excess K2S. Subsequent heat-treatment further enhanced the ionic conductivity, achieving 1.2 × 10−5 S cm−1 at 25 °C. This improvement is attributed to the nominal composition being close to that of K3SbS4 by adjusting the excess amount of K2S and the increased crystallinity of β-K3SbS4.https://www.jstage.jst.go.jp/article/electrochemistry/93/7/93_25-00082/_html/-char/enpotassium-ion conductorsolid electrolytesulfideall-solid-state battery |
| spellingShingle | Takehiro NAKAO Chihiro OKUSHIMA Takuya KIMURA Akira NASU Kota MOTOHASHI Atsushi SAKUDA Akitoshi HAYASHI Mechanochemical Synthesis of Potassium–Ion Conductor K3SbS4 Electrochemistry potassium-ion conductor solid electrolyte sulfide all-solid-state battery |
| title | Mechanochemical Synthesis of Potassium–Ion Conductor K3SbS4 |
| title_full | Mechanochemical Synthesis of Potassium–Ion Conductor K3SbS4 |
| title_fullStr | Mechanochemical Synthesis of Potassium–Ion Conductor K3SbS4 |
| title_full_unstemmed | Mechanochemical Synthesis of Potassium–Ion Conductor K3SbS4 |
| title_short | Mechanochemical Synthesis of Potassium–Ion Conductor K3SbS4 |
| title_sort | mechanochemical synthesis of potassium ion conductor k3sbs4 |
| topic | potassium-ion conductor solid electrolyte sulfide all-solid-state battery |
| url | https://www.jstage.jst.go.jp/article/electrochemistry/93/7/93_25-00082/_html/-char/en |
| work_keys_str_mv | AT takehironakao mechanochemicalsynthesisofpotassiumionconductork3sbs4 AT chihirookushima mechanochemicalsynthesisofpotassiumionconductork3sbs4 AT takuyakimura mechanochemicalsynthesisofpotassiumionconductork3sbs4 AT akiranasu mechanochemicalsynthesisofpotassiumionconductork3sbs4 AT kotamotohashi mechanochemicalsynthesisofpotassiumionconductork3sbs4 AT atsushisakuda mechanochemicalsynthesisofpotassiumionconductork3sbs4 AT akitoshihayashi mechanochemicalsynthesisofpotassiumionconductork3sbs4 |