9 research outputs found
Surface characterization of coated cathodes with lithium phosphorous oxynitride thin film for all-solid-state Li-S batteries
X-Ray and Raman studies on all-solid-state Li-S batteries built around LiBH4 solid electrolyte
Solid-state lithium sulfur batteries using nanoconfined complex hydrides as solid electrolytes
X-Ray microtomography studies on all-solid-state Li-S batteries built around LiBH<sub>4</sub> solid electrolyte
Cathodic protection of all-solid-state LiS batteries by magnetron sputtering with lithium phosphorous oxynitride
Lithium Conductivity and Ions Dynamics in LiBH<sub>4</sub>/SiO<sub>2</sub> Solid-Electrolytes studied by Solid-State NMR and Quasi Elastic Neutron Scattering and applied in Lithium-Sulfur Batteries
Composite solid-state electrolytes based on ball milled LiBH4/SiO2 aerogel exhibit high lithium conductivities, and we have found an optimal weight ratio of 30/70 wt % LiBH4/SiO2 with a conductivity of 0.1 mS cm(-1) at room temperature. We have studied the Li+ and BH4 dynamics using quasi-elastic neutron scattering and solid-state nuclear magnetic resonance and found that only a small fraction (similar to 10%) of the ions have high mobilities, whereas most of the LiBH4 shows behavior similar to macrocrystal line material. The modified LiBH4 is formed from interaction with the SiO2 surface and most probably from reaction with the surface silanol groups. We successfully applied these composite electrolytes in lithium-sulfur solid-state batteries. The batteries show reasonable capacity retention (794 mAh g(-1) sulfur after 10 discharge-charge cycles, Coulombic efficiency of 88.8 +/- 2.7%, and average capacity loss of 7.2% during the first 10 cycles)
Lithium Conductivity and Ions Dynamics in LiBH<sub>4</sub>/SiO<sub>2</sub> Solid Electrolytes Studied by Solid-State NMR and Quasi-Elastic Neutron Scattering and Applied in Lithium–Sulfur Batteries
Composite solid-state
electrolytes based on ball-milled LiBH<sub>4</sub>/SiO<sub>2</sub> aerogel exhibit high lithium conductivities,
and we have found an optimal weight ratio of 30/70 wt % LiBH<sub>4</sub>/SiO<sub>2</sub> with a conductivity of 0.1 mS cm<sup>–1</sup> at room temperature. We have studied the Li<sup>+</sup> and BH<sub>4</sub><sup>–</sup> dynamics using quasi-elastic neutron scattering
and solid-state nuclear magnetic resonance and found that only a small
fraction (∼10%) of the ions have high mobilities, whereas most
of the LiBH<sub>4</sub> shows behavior similar to macrocrystalline
material. The modified LiBH<sub>4</sub> is formed from interaction
with the SiO<sub>2</sub> surface and most probably from reaction with
the surface silanol groups. We successfully applied these composite
electrolytes in lithium–sulfur solid-state batteries. The batteries
show reasonable capacity retention (794 mAh g<sup>–1</sup> sulfur
after 10 discharge–charge cycles, Coulombic efficiency of 88.8
± 2.7%, and average capacity loss of 7.2% during the first 10
cycles)