초록 ▼

Alloy compositions, lithium ion batteries, and methods of making lithium ion batteries are described. The lithium ion batteries have anodes that contain an alloy composition that includes a) silicon, b) aluminum, c) transition metal, d) tin, e) indium, and f) a sixth element that contains yttrium, a

Alloy compositions, lithium ion batteries, and methods of making lithium ion batteries are described. The lithium ion batteries have anodes that contain an alloy composition that includes a) silicon, b) aluminum, c) transition metal, d) tin, e) indium, and f) a sixth element that contains yttrium, a lanthanide element, an actinide element, or a combination thereof. The alloy composition is a mixture of an amorphous phase that includes silicon and a crystalline phase that includes an intermetallic compound of 1) tin, 2) indium, and 3) the sixth element.

대표청구항 ▼

We claim: 1. A lithium ion battery comprising a cathode, an anode, and an electrolyte in electrical communication with both the anode and the cathode, wherein the anode comprises an alloy composition comprisinga) silicon in an amount of 35 to 70 mole percent;b) aluminum in an amount of 1 to 45 mole

We claim: 1. A lithium ion battery comprising a cathode, an anode, and an electrolyte in electrical communication with both the anode and the cathode, wherein the anode comprises an alloy composition comprisinga) silicon in an amount of 35 to 70 mole percent;b) aluminum in an amount of 1 to 45 mole percent;c) a transition metal in an amount of 5 to 25 mole percent;d) tin in an amount of 1 to 15 mole percent;e) indium in an amount up to 15 mole percent; andf) a sixth element comprising yttrium, a lanthanide element, an actinide element, or a combination thereof in an amount of 2 to 15 mole percent,wherein each mole percent is based on a total number of moles of all elements except lithium in the alloy composition;wherein the alloy composition is a mixture of an amorphous phase comprising silicon and a nanocrystalline phase comprising an intermetallic compound with tin, indium, and the sixth element, andwherein the nanocrystalline phase comprises crystalline materials having a maximum dimension of about 5 to about 50 nanometers.