3m Innovative Properties Company

Dinh B Le

Mark N Obrovac

James R Landucci

Jeffrey R Dahn

Leif Christensen

Pierre P Ferguson

Phat Tan Pham

Robert Y Kube

Powder milling techniques, tin-based alloys formed thereby, and the use of such alloys as electrode compositions for lithium ion batteries are provided. The alloys include tin and at least one transition metal but contain no silicon. The powder milling is done using low energy roller milling (pebble milling).

Method of making tin-based alloys for negative electrode compositions

Provided are electrode compositions for lithium-ion electrochemical cells that include novel binders. The novel binders include lithium polysalts of carboxylic and sulfonic acids, lithium salts of copolymers of acids, lithium polysulfonate fluoropolymers, a cured phenolic resin, cured glucose, and combinations thereof.

Electrodes including novel binders and methods of making and using the same

A method of making nanostructured alloy particles includes milling a millbase in a pebble mill containing milling media. The millbase comprises: (i) silicon, and (ii) at least one of carbon or a transition metal, and wherein the nanostructured alloy particles are substantially free of crystalline domains greater than 50 nanometers in size. A method of making a negative electrode composition for a lithium ion battery including the nanostructured alloy particles is also disclosed.

Low energy milling method, low crystallinity alloy, and negative electrode composition

An electrode composition for a lithium ion battery having the formula SiSnMCwhere q, x, y, and z represent atomic percent values and (a) (q+x)&#x3e;2y+z; (b) q&#x2267;0, (c) z&#x2267;0; and (d) M is one or more metals selected from manganese, molybdenum, niobium, tungsten, tantalum, iron, copper, titanium, vanadium, chromium, nickel, cobalt, zirconium, yttrium, or a combination thereof. The Si, Sn, M, and C elements are arranged in the form of a multi-phase microstructure comprising: (a) an amorphous phase comprising silicon; (b) a nanocrystalline phase comprising a metal silicide; and (c) a phase comprising silicon carbide phase when z&#x3e;0; and (d) an amorphous phase comprising Sn when q&#x3e;0.

Silicon-containing alloys useful as electrodes for lithium-ion batteries

Provided is an electrode composition comprising a powdered material capable of undergoing lithiation and delithiation, and a non-elastomeric binder comprising lithium polyacrylate, along with methods of making and using the same, as well as electrochemical cells incorporating the same.

Electrodes including polyacrylate binders and methods of making and using the same

An electrode composition for a lithium-ion battery comprising particles having an average particle size ranging from 1 &#x3bc;m to 50 &#x3bc;m. The particles include an electrochemically active phase and an electrochemically inactive phase that share a common phase boundary. The electrochemically active phase includes elemental silicon and the electrochemically inactive phase includes at least two metal elements in the form of an intermetallic compound, a solid solution, or combination thereof. Each of the phases is free of crystallites that are greater than 1000 angstroms prior to cycling. In addition, the electrochemically active phase is amorphous after the electrode has been cycled through one full charge-discharge cycle in a lithium-ion battery.

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Saint Paul, MN, United States of America

Dinh B Le