Journal
ADVANCED ENERGY MATERIALS
Volume 3, Issue 1, Pages 120-127Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201200267
Keywords
iron disulfide; lithium metal; solid state battery; reversible; marcasite; pyrite
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Funding
- National Science Foundation Graduate Research Fellowship Program (NSF-GRFP)
- Defense Advanced Research Project Agency (DARPA) [FA8650-08-1-7839]
- Fundamental R&D program for Technology of World Premier Materials through the Ministry of Knowledge Economy of Korea [10037919]
- World Class University (WCU) program through the National Research Foundation (NRF) of Korea [R31-2008-000-10071-0, R31-2008-000-10075-0]
- Center for Iron and Steel Research Institute of Advanced Materials (RIAM) [D-BB04-11, 0417-20110105]
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We report that a solid-state battery architecture enables the reversible, four electron storage of fully utilized solvothermally synthesized 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 degrees C. We find that nanoparticles of orthorhombic-FeS2 (marcasite) are generated upon recharge at 30-60 degrees C which explains a coincident change in rate kinetics.
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