am9b14478_si_001.pdf (1.47 MB)
Scalable, Large-Area Printing of Pore-Array Electrodes for Ultrahigh Power Electrochemical Energy Storage
journal contribution
posted on 2019-10-04, 19:44 authored by Sang Ho Lee, Colin Johnston, Patrick S. GrantThrough-electrode
thickness honeycomb architectures were layer-by-layer
self-assembled directly through a scalable printing process for ultrapower
hybrid lithium-ion capacitor applications. Initially, the electrochemical
performance of the pore-array electrodes was investigated as a function
of the active material type (graphene plates, carbon nanofibers, and
activated carbon). Inactive components (conductive carbon and polymer
binder) were then minimized to 5 wt %. Finally, an optimized activated
carbon-based cathode was paired with a spray-printed Li4Ti5O12-based anode and a range of anode-to-cathode
mass ratios in a lithium-ion capacitor arrangement were investigated.
A 1:5 anode/cathode mass ratio provided an attractive energy density
comparable with a Li4Ti5O12/LiFePO4 lithium-ion battery but with outstanding power capability
that was an order of magnitude greater than typical for lithium-ion
batteries. The pore-array electrode was reproduced over areas of 20
cm × 15 cm in a double-sided coated configuration, and the option
for selectively patterning electrodes was also demonstrated.
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lithium-ion capacitor applicationsspray-printed Li 4 Ti 5 O 12anode-to-cathode mass ratiosPore-Array ElectrodesUltrahigh Power Electrochemical Energy Storage Through-electrode thickness honeycomb architecturescarbon-based cathodepolymer binderpore-array electrodepatterning electrodespower capabilityelectrochemical performancecmlayer-by-layer self-assembledpore-array electrodesenergy densitymaterial typegraphene platesInactive componentscarbon nanofibersLarge-Area Printingconductive carbonscalable printing processlithium-ion capacitor arrangementlithium-ion batteries
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