LiBH4 has been widely studied as a solid-state electrolyte in Li-ion batteries working at 120 °C due to the low ionic conductivity at room temperature. In this work, by mixing with MgO, the Li-ion conductivity of LiBH4 has been improved. The optimum composition of the mixture is 53 v/v % of MgO, showing a Li-ion conductivity of 2.86 × 10-4 S cm-1 at 20 °C. The formation of the composite does not affect the electrochemical stability window, which is similar to that of pure LiBH4 (about 2.2 V vs Li+/Li). The mixture has been incorporated as the electrolyte in a TiS2/Li all-solid-state Li-ion battery. A test at room temperature showed that only five cycles already resulted in cell failure. On the other hand, it was possible to form a stable solid electrolyte interphase by applying several charge/discharge cycles at 60 °C. Afterward, the battery worked at room temperature for up to 30 cycles with a capacity retention of about 80%.

Room-Temperature Solid-State Lithium-Ion Battery Using a LiBH4-MgO Composite Electrolyte / Gulino, V.; Brighi, M.; Murgia, F.; Ngene, P.; De Jongh, P.; Cerny, R.; Baricco, M.. - In: ACS APPLIED ENERGY MATERIALS. - ISSN 2574-0962. - 4:2(2021), pp. 1228-1236. [10.1021/acsaem.0c02525]

Room-Temperature Solid-State Lithium-Ion Battery Using a LiBH4-MgO Composite Electrolyte

Murgia F.;Cerny R.;Baricco M.
2021-01-01

Abstract

LiBH4 has been widely studied as a solid-state electrolyte in Li-ion batteries working at 120 °C due to the low ionic conductivity at room temperature. In this work, by mixing with MgO, the Li-ion conductivity of LiBH4 has been improved. The optimum composition of the mixture is 53 v/v % of MgO, showing a Li-ion conductivity of 2.86 × 10-4 S cm-1 at 20 °C. The formation of the composite does not affect the electrochemical stability window, which is similar to that of pure LiBH4 (about 2.2 V vs Li+/Li). The mixture has been incorporated as the electrolyte in a TiS2/Li all-solid-state Li-ion battery. A test at room temperature showed that only five cycles already resulted in cell failure. On the other hand, it was possible to form a stable solid electrolyte interphase by applying several charge/discharge cycles at 60 °C. Afterward, the battery worked at room temperature for up to 30 cycles with a capacity retention of about 80%.
2021
Room-Temperature Solid-State Lithium-Ion Battery Using a LiBH4-MgO Composite Electrolyte / Gulino, V.; Brighi, M.; Murgia, F.; Ngene, P.; De Jongh, P.; Cerny, R.; Baricco, M.. - In: ACS APPLIED ENERGY MATERIALS. - ISSN 2574-0962. - 4:2(2021), pp. 1228-1236. [10.1021/acsaem.0c02525]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11388/303972
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