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High Capacity Rate Capable Aerosol Jet Printed Li‐Ion Battery Cathode
Author(s) -
Deiner L. Jay,
Jenkins Thomas,
Powell Amber,
Howell Thomas,
Rottmayer Michael
Publication year - 2019
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201801281
Subject(s) - cathode , materials science , anode , aerosol , foil method , jet (fluid) , battery (electricity) , ion , deposition (geology) , constant current , analytical chemistry (journal) , current (fluid) , composite material , electrical engineering , electrode , meteorology , chemistry , chromatography , aerospace engineering , paleontology , power (physics) , physics , organic chemistry , quantum mechanics , sediment , biology , engineering
A thick (170 μm) LiFePO 4 cathode is fabricated through aerosol jet printing. The printed cathode displays a pattern of aligned high aspect ratio needles which, in cross section, produce micron scale channels. These channels surround regions of LiFePO 4 that possess submicron pores. When tested in half cell configuration versus a Li‐foil anode, the specific discharge capacity of the printed cathode is 151 mAh g −1 at a C/15 rate and 105 mAh g −1 at 1C. These values correspond to area normalized discharge capacities of 2.5 and 1.7 mAh cm −2 at current densities of 0.2 and 2.4 mA cm −2 , respectively. In a 50 cycle constant current charge/discharge test, the discharge capacity is stable, retaining 89% of its initial C/5 capacity. These results suggest that aerosol jet deposition is a promising printing technique for fabricating high capacity, rate capable, Li‐ion battery cathodes.