The Iowa Homemaker vol.41, no.3

Discover People As A Resource, Dean LeBaron, page 5 Delegate Heeds Warning to Bring Shopping Bags, Jan Dodds, page 6 Ordinary Quarters?, Melva LaFrenz, page 8 The Homemaker, Deanne Stenstrom, page 9 Presenting: Six New Faces in Home Economics, Mary McKennan, page 10 Home Economists Help Solve Nation-wide Crises, Mary McKennan, page 12 Look Where You’re Going, page 13 HERS, page 14 HIS, Mary Ellen Muckenhirn and LaVeda Jansonius, page 15 Girls Give Training No Summer Vacation, Barb Pierson, page 1

Li1.5La1.5MO6 (M = W6+, Te6+) as a new series of lithium-rich double perovskites for all-solid-state lithium-ion batteries

Solid-state batteries are a proposed route to safely achieving high energy densities, yet this architecture faces challenges arising from interfacial issues between the electrode and solid electrolyte. Here we develop a novel family of double perovskites, Li1.5La1.5MO6 (M = W6+, Te6+), where an uncommon lithium-ion distribution enables macroscopic ion diffusion and tailored design of the composition allows us to switch functionality to either a negative electrode or a solid electrolyte. Introduction of tungsten allows reversible lithium-ion intercalation below 1 V, enabling application as an anode (initial specific capacity >200 mAh g-1 with remarkably low volume change of ∼0.2%). By contrast, substitution of tungsten with tellurium induces redox stability, directing the functionality of the perovskite towards a solid-state electrolyte with electrochemical stability up to 5 V and a low activation energy barrier (<0.2 eV) for microscopic lithium-ion diffusion. Characterisation across multiple length- and time-scales allows interrogation of the structure-property relationships in these materials and preliminary examination of a solid-state cell employing both compositions suggests lattice-matching avenues show promise for all-solid-state batteries