Electrodes for batteries
AssigneeThe Hong Kong Polytechnic University
InventorsZijian Zheng, Jian Chang
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Abstract
Provided herein are a lithium electrode and a sulfur electrode for batteries. The lithium electrode comprises lithium metal and a metal-coated fabric. The fibers of the metal-coated fabric are covered by a metal layer, on which the lithium metal is attached. The sulfur electrode comprises a sulfur composite and a nickel-coated fabric. The fibers of the nickel-coated fabric are covered by a nickel layer, on which the sulfur composite is attached. The lithium electrode can inhibit dendrite formation and the sulfur electrode can speed up the redox kinetics of soluble polysulfides.
Claims5
An electrode for a battery comprising:
- lithium metal;
- and
- a metal-coated carbon fabric having a three-dimensional porous structure and comprising carbon fibers, a copper layer, and an interfacial polymer layer sandwiched between the carbon fibers and the copper layer, the interfacial polymer layer being an interfacial poly[2-(methacryloyloxy) ethyl]trimethyl ammonium chloride (PMETAC) layer for bonding the copper layer to each of the carbon fibers thereby forming the metal-coated carbon fabric;
- wherein each of the carbon fibers comprises a diameter in a range of 5 μm to 20 μm,
- wherein the copper layer comprises copper nanoparticles for enhancing affinity to the lithium metal and confining deposit of the lithium metal, the copper nanoparticles fully covering a surface of the metal-coated carbon fabric;
- wherein the lithium metal is attached to the copper layer;
- wherein a portion of the lithium metal has a two-dimensional nanostructure and is in a form of a flake;
- and
- wherein the flake has a lateral dimension in a range of 1 μm to 5 μm and a thickness in a range of 1-100 nm.
Dependencies are inferred from the claim text.