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US 2011/0033747 A1Published application
Carbon fiber zinc negative electrode
AssigneePowerGenix Systems, Inc.
InventorsJeffrey Phillips, Samaresh Mohanta, Deepan Bose, Cecilia Maske
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Abstract
The conductivity of a zinc negative electrode is enhanced through use of surfactant-coated carbon fibers. Carbon fibers, along with other active materials such as bismuth oxide, zinc etc., form an electronically conductive matrix in zinc negative electrodes. Zinc negative electrodes as described herein are particularly useful in nickel zinc secondary batteries.
Claims26
A rechargeable nickel zinc cell comprising:
- i) a zinc negative electrode comprising electrochemically active zinc and surfactant-coated carbon fiber;
- and
- ii) a nickel positive electrode.
A method of fabricating a zinc negative electrode, the method comprising:
- (i) coating lead and/or tin onto zinc particles comprising at least one of zinc and zinc oxide;
- (ii) coating carbon particles with a surfactant to make coated carbon particles;
- (iii) forming a paste from the coated zinc particles, coated carbon particles, bismuth oxide, a dispersing agent, a binding agent, and a liquid;
- and
- (iv) incorporating the paste into a zinc electrode.
2 more elements
A method of fabricating a zinc negative electrode, comprising:
- (i) treating carbon particles with a surfactant to produce surfactant-coated carbon particles;
- (ii) combining the surfactant-coated carbon particles with, at least, electrochemically active zinc to produce an evenly dispersed mixture;
- and
- (iii) coating a substrate current collector with the evenly dispersed mixture.
1 more element
Dependencies are inferred from the claim text.