Reduced Sintering Temperatures of Li<sup>+</sup> Conductive Li<sub>1.3</sub>Al<sub>0.3</sub>Ti<sub>1.7</sub>(PO<sub>4</sub>)<sub>3</sub> Ceramics
All-solid-state batteries (ASSB) are considered promising candidates for future energy storage and advanced electric mobility. When compared to conventional Li-ion batteries, the substitution of Li-ion conductive, flammable liquids by a solid electrolyte and the application of Li-metal anodes substa...
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MDPI AG
2020-05-01
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| Online Access: | https://www.mdpi.com/2073-4352/10/5/408 |
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| author | Katja Waetzig Christian Heubner Mihails Kusnezoff |
| author_facet | Katja Waetzig Christian Heubner Mihails Kusnezoff |
| author_sort | Katja Waetzig |
| collection | DOAJ |
| description | All-solid-state batteries (ASSB) are considered promising candidates for future energy storage and advanced electric mobility. When compared to conventional Li-ion batteries, the substitution of Li-ion conductive, flammable liquids by a solid electrolyte and the application of Li-metal anodes substantially increase safety and energy density. The solid electrolyte Li<sub>1.3</sub>Al<sub>0.3</sub>Ti<sub>1.7</sub>(PO<sub>4</sub>)<sub>3</sub> (LATP) provides high Li-ion conductivity of about 10<sup>−3</sup> S/cm and is considered a highly promising candidate for both the solid electrolyte-separator and the ionically conductive part of the all-solid state composite cathode, consisting of the cathode material, the solid electrolyte, and an electron conductor. Co-sintering of the composite cathode is a sophisticated challenge, because temperatures above 1000 °C are typically required to achieve the maximum ionic conductivity of LATP but provoke reactions with the cathode material, inhibiting proper electrochemical functioning in the ASSB. In the present study, the application of sintering aids with different melting points and their impact on the sinterability and the conductivity of LATP were investigated by means of optical dilatometry and impedance spectroscopy. The microstructure of the samples was analyzed by SEM. The results indicate that the sintering temperature can be reduced below 800 °C while maintaining high ionic conductivity of up to 3.6 × 10<sup>−4</sup> S/cm. These insights can be considered a crucial step forward towards enable LATP-based composite cathodes for future ASSB. |
| first_indexed | 2024-03-10T19:44:11Z |
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| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T19:44:11Z |
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| spelling | doaj.art-d7dc8331da75470a99d4ade33e13a91b2023-11-20T01:01:50ZengMDPI AGCrystals2073-43522020-05-0110540810.3390/cryst10050408Reduced Sintering Temperatures of Li<sup>+</sup> Conductive Li<sub>1.3</sub>Al<sub>0.3</sub>Ti<sub>1.7</sub>(PO<sub>4</sub>)<sub>3</sub> CeramicsKatja Waetzig0Christian Heubner1Mihails Kusnezoff2Fraunhofer IKTS, Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Winterbergstrasse 28, 01277 Dresden, GermanyFraunhofer IKTS, Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Winterbergstrasse 28, 01277 Dresden, GermanyFraunhofer IKTS, Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Winterbergstrasse 28, 01277 Dresden, GermanyAll-solid-state batteries (ASSB) are considered promising candidates for future energy storage and advanced electric mobility. When compared to conventional Li-ion batteries, the substitution of Li-ion conductive, flammable liquids by a solid electrolyte and the application of Li-metal anodes substantially increase safety and energy density. The solid electrolyte Li<sub>1.3</sub>Al<sub>0.3</sub>Ti<sub>1.7</sub>(PO<sub>4</sub>)<sub>3</sub> (LATP) provides high Li-ion conductivity of about 10<sup>−3</sup> S/cm and is considered a highly promising candidate for both the solid electrolyte-separator and the ionically conductive part of the all-solid state composite cathode, consisting of the cathode material, the solid electrolyte, and an electron conductor. Co-sintering of the composite cathode is a sophisticated challenge, because temperatures above 1000 °C are typically required to achieve the maximum ionic conductivity of LATP but provoke reactions with the cathode material, inhibiting proper electrochemical functioning in the ASSB. In the present study, the application of sintering aids with different melting points and their impact on the sinterability and the conductivity of LATP were investigated by means of optical dilatometry and impedance spectroscopy. The microstructure of the samples was analyzed by SEM. The results indicate that the sintering temperature can be reduced below 800 °C while maintaining high ionic conductivity of up to 3.6 × 10<sup>−4</sup> S/cm. These insights can be considered a crucial step forward towards enable LATP-based composite cathodes for future ASSB.https://www.mdpi.com/2073-4352/10/5/408Li-ion conductive ceramicsolid electrolyteLi-ion batteriesall-solid-state batteriesLATP |
| spellingShingle | Katja Waetzig Christian Heubner Mihails Kusnezoff Reduced Sintering Temperatures of Li<sup>+</sup> Conductive Li<sub>1.3</sub>Al<sub>0.3</sub>Ti<sub>1.7</sub>(PO<sub>4</sub>)<sub>3</sub> Ceramics Crystals Li-ion conductive ceramic solid electrolyte Li-ion batteries all-solid-state batteries LATP |
| title | Reduced Sintering Temperatures of Li<sup>+</sup> Conductive Li<sub>1.3</sub>Al<sub>0.3</sub>Ti<sub>1.7</sub>(PO<sub>4</sub>)<sub>3</sub> Ceramics |
| title_full | Reduced Sintering Temperatures of Li<sup>+</sup> Conductive Li<sub>1.3</sub>Al<sub>0.3</sub>Ti<sub>1.7</sub>(PO<sub>4</sub>)<sub>3</sub> Ceramics |
| title_fullStr | Reduced Sintering Temperatures of Li<sup>+</sup> Conductive Li<sub>1.3</sub>Al<sub>0.3</sub>Ti<sub>1.7</sub>(PO<sub>4</sub>)<sub>3</sub> Ceramics |
| title_full_unstemmed | Reduced Sintering Temperatures of Li<sup>+</sup> Conductive Li<sub>1.3</sub>Al<sub>0.3</sub>Ti<sub>1.7</sub>(PO<sub>4</sub>)<sub>3</sub> Ceramics |
| title_short | Reduced Sintering Temperatures of Li<sup>+</sup> Conductive Li<sub>1.3</sub>Al<sub>0.3</sub>Ti<sub>1.7</sub>(PO<sub>4</sub>)<sub>3</sub> Ceramics |
| title_sort | reduced sintering temperatures of li sup sup conductive li sub 1 3 sub al sub 0 3 sub ti sub 1 7 sub po sub 4 sub sub 3 sub ceramics |
| topic | Li-ion conductive ceramic solid electrolyte Li-ion batteries all-solid-state batteries LATP |
| url | https://www.mdpi.com/2073-4352/10/5/408 |
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