Thomas A. Yersak, H. Alex Macpherson, Seul Cham Kim, Viet-Duc Le, Chan Soon Kang, Seoung-Bum Son, Yong-Hyun Kim, James E. Trevey, Kyu Hwan Oh, Conrad Stoldt and Se-Hee Lee Solid State Enabled Reversible Four Electron Storage Advanced Energy Materials 3
A solid-state battery architecture enables the reversible, four electron storage of fully utilized synthetic cubic-FeS2 (pyrite). With a sulfide based glass electrolyte we successfully confine electro-active species and permit the safe use of a lithium metal anode. These FeS2/Li solid-state cells deliver a theoretical specific capacity of 894 mAh g−1 at 60 °C. It is found that nanoparticles of orthorhombic-FeS2 (marcasite) are generated upon recharge at 30–60 °C, which explains a coincident change in rate kinetics.
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