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US 12,640,315 B2Granted
Advanced lithium-ion energy storage device
AssigneeNanoramic, Inc.
InventorsJi Chen, Wanjun Ben Cao, Kitae Park, Nicolo M. Brambilla, Jin Yan, John Hyde, Mackenzie Cash
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Abstract
A lithium ion capacitor includes binder free positive and negative electrode active layers. The capacitor exhibits high energy density, power density and cycle life and provides a good compromise in performance between an electric double layer capacitor and a lithium ion battery.
Claims20
A lithium ion capacitor apparatus, comprising:
- a positive electrode comprising a network of carbon that is substantially free of binder material;
- a negative electrode comprising a network of carbon that is substantially free of binder material separated from the positive electrode by a separator;
- an organic solvent electrolytic solution with lithium salt as an electrolyte, comprising lithium bis(fluorosulfonyl)imide in ethylene carbonate, ethylene glycol monobutyl ether, diethyl carbonate and propylene carbonate;
- and
- a film of lithium comprising no holes and disposed on the negative electrode to provide for pre-lithiation of the capacitor;
- wherein at least one of the positive electrode and the negative electrode comprises:
- a network of high aspect ratio carbon elements defining void spaces within the network;
- and
- a plurality of electrode active material particles disposed in the void spaces within the network and enmeshed in the network.
6 more elements
Dependencies are inferred from the claim text.