Journal
ENERGY STORAGE MATERIALS
Volume 16, Issue -, Pages 505-511Publisher
ELSEVIER
DOI: 10.1016/j.ensm.2018.09.021
Keywords
Li metal anode; Dendrite Free; High coulombic efficiency; Porous host; 3D host
Funding
- Office of Vehicle Technologies of the U.S. Department of Energy through the Advanced Battery Materials Research (BMR) Program (Battery500 Consortium) [DE-EE0007764]
- National Science Foundation Major Research Instrumentation Program [CHE-1338173]
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A scalable 3D electrode to serve as a lithium metal host is developed to enable stable lithium metal cycling. The electrode is simply fabricated by coating a slurry of well mixed LiNO3, carbon black, and PVDF on the Cu foil. The pores in the electrode serve as lithium metal hosts while the LiNO3 particles act both as a structural skeleton and an electrolyte additive. Micron-level dense Li chunks are deposited into the 3D electrode at a current density of 2 mA cm(-2). Moreover, high coulombic efficiencies of 98.4% and 97.1% are achieved in carbonate-based electrolytes at current densities of 0.25mA cm(-2) and 2 mA cm(-2), respectively. The 3D electrode is tested in an anode free cell with LiFePO4, which exhibits a good capacity retention of 49.1% after 100 cycles and correspond to an average efficiency of 99.3% per cycle. This work provides a facile and scalable method to fabricate multi-functional 3D electrodes for dendrite-free and high coulombic efficiency Li metal anodes.
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