Hydrated alkali-B11H14 salts as potential solid-state electrolytes
Metal boron-hydrogen compounds are considered as promising solid electrolyte candidates for the development of all-solid-state batteries (ASSB), owing to the high ionic conductivity exhibited bycloso- andnido-boranes. In this study, an optimised low cost preparation method of MB11H14·(H2O)n, (M = Li...
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| Format: | Journal Article |
| Language: | English |
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ROYAL SOC CHEMISTRY
2021
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| Online Access: | http://purl.org/au-research/grants/arc/FT160100303 http://hdl.handle.net/20.500.11937/90585 |
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| author | Souza, Diego Møller, Kasper Moggach, S.A. Humphries, Terry D'Angelo, A.M. Buckley, Craig Paskevicius, Mark |
| author_facet | Souza, Diego Møller, Kasper Moggach, S.A. Humphries, Terry D'Angelo, A.M. Buckley, Craig Paskevicius, Mark |
| author_sort | Souza, Diego |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Metal boron-hydrogen compounds are considered as promising solid electrolyte candidates for the development of all-solid-state batteries (ASSB), owing to the high ionic conductivity exhibited bycloso- andnido-boranes. In this study, an optimised low cost preparation method of MB11H14·(H2O)n, (M = Li and Na) and KB11H14is proposed and analysed. The formation of the B11H14−salt is pH-dependent, and H3O+competes with small ionic radii cations, such as Li+and Na+, to produce a hydronium salt of B11H14−, which forms B11H13OH−upon heating. The use of diethyl ether to extract B11H14−salt from the aqueous medium during synthesis is an important step to avoid hydrolysis of the compound upon drying. The proposed method of synthesis results in LiB11H14and NaB11H14coordinated with water, whereas KB11H14is anhydrous. Hydrated LiB11H14·(H2O)nand NaB11H14·(H2O)nexhibit exceptional ionic conductivities at 25 °C, 1.8 × 10−4S cm−1and 1.1 × 10−3S cm−1, respectively, which represent some of the highest solid-state Li+and Na+conductivities at room temperature. The salts also exhibit oxidative stability of 2.1 Vvs.Li+/Li and 2.6 Vvs.Na+/Na, respectively. KB11H14undergoes a reversible polymorphic structural transition to a metastable phase before decomposing. All synthesisednido-boranes decompose at temperatures greater than 200 °C. |
| first_indexed | 2025-11-14T11:34:34Z |
| format | Journal Article |
| id | curtin-20.500.11937-90585 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:34:34Z |
| publishDate | 2021 |
| publisher | ROYAL SOC CHEMISTRY |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-905852023-03-24T05:32:43Z Hydrated alkali-B11H14 salts as potential solid-state electrolytes Souza, Diego Møller, Kasper Moggach, S.A. Humphries, Terry D'Angelo, A.M. Buckley, Craig Paskevicius, Mark Science & Technology Physical Sciences Technology Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Materials Science SODIUM SUPERIONIC CONDUCTION VIBRATIONAL SPECTROSCOPY POLYMER ELECTROLYTES METAL BOROHYDRIDES ION CONDUCTION LITHIUM BORANES LI BATTERIES CHEMISTRY Metal boron-hydrogen compounds are considered as promising solid electrolyte candidates for the development of all-solid-state batteries (ASSB), owing to the high ionic conductivity exhibited bycloso- andnido-boranes. In this study, an optimised low cost preparation method of MB11H14·(H2O)n, (M = Li and Na) and KB11H14is proposed and analysed. The formation of the B11H14−salt is pH-dependent, and H3O+competes with small ionic radii cations, such as Li+and Na+, to produce a hydronium salt of B11H14−, which forms B11H13OH−upon heating. The use of diethyl ether to extract B11H14−salt from the aqueous medium during synthesis is an important step to avoid hydrolysis of the compound upon drying. The proposed method of synthesis results in LiB11H14and NaB11H14coordinated with water, whereas KB11H14is anhydrous. Hydrated LiB11H14·(H2O)nand NaB11H14·(H2O)nexhibit exceptional ionic conductivities at 25 °C, 1.8 × 10−4S cm−1and 1.1 × 10−3S cm−1, respectively, which represent some of the highest solid-state Li+and Na+conductivities at room temperature. The salts also exhibit oxidative stability of 2.1 Vvs.Li+/Li and 2.6 Vvs.Na+/Na, respectively. KB11H14undergoes a reversible polymorphic structural transition to a metastable phase before decomposing. All synthesisednido-boranes decompose at temperatures greater than 200 °C. 2021 Journal Article http://hdl.handle.net/20.500.11937/90585 10.1039/d1ta01551f English http://purl.org/au-research/grants/arc/FT160100303 ROYAL SOC CHEMISTRY fulltext |
| spellingShingle | Science & Technology Physical Sciences Technology Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Materials Science SODIUM SUPERIONIC CONDUCTION VIBRATIONAL SPECTROSCOPY POLYMER ELECTROLYTES METAL BOROHYDRIDES ION CONDUCTION LITHIUM BORANES LI BATTERIES CHEMISTRY Souza, Diego Møller, Kasper Moggach, S.A. Humphries, Terry D'Angelo, A.M. Buckley, Craig Paskevicius, Mark Hydrated alkali-B11H14 salts as potential solid-state electrolytes |
| title | Hydrated alkali-B11H14 salts as potential solid-state electrolytes |
| title_full | Hydrated alkali-B11H14 salts as potential solid-state electrolytes |
| title_fullStr | Hydrated alkali-B11H14 salts as potential solid-state electrolytes |
| title_full_unstemmed | Hydrated alkali-B11H14 salts as potential solid-state electrolytes |
| title_short | Hydrated alkali-B11H14 salts as potential solid-state electrolytes |
| title_sort | hydrated alkali-b11h14 salts as potential solid-state electrolytes |
| topic | Science & Technology Physical Sciences Technology Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Materials Science SODIUM SUPERIONIC CONDUCTION VIBRATIONAL SPECTROSCOPY POLYMER ELECTROLYTES METAL BOROHYDRIDES ION CONDUCTION LITHIUM BORANES LI BATTERIES CHEMISTRY |
| url | http://purl.org/au-research/grants/arc/FT160100303 http://hdl.handle.net/20.500.11937/90585 |