Group14 Technologies, Inc.

Passivated silicon-carbon composite materials and related processes are disclosed that overcome the challenges for providing amorphous nano-sized silicon entrained within porous carbon. Compared to other, inferior materials and processes described in the prior art, the materials and processes disclosed herein find superior utility in various applications, including energy storage devices such as lithium ion batteries.

Silicon carbon composite materials and related processes are disclosed that overcome the challenges for providing amorphous nano sized silicon entrained within porous carbon. Compared to other, inferior materials and processes described in the prior art, the materials and processes disclosed herein find superior utility in various applications, including energy storage devices such as lithium ion batteries.

Porous silicon and methods for preparation and use of the same are disclosed. The porous silicon materials have utility either alone or in combination with other materials, for example, combined with carbon particles for energy storage applications.

Composites of porous nano-featured silicon and various materials, such as carbon, are provided. The composites find utility in various applications, such as electrical energy storage electrodes and devices comprising the same.

The present application is generally directed to gas storage materials such as activated carbon comprising enhanced gas adsorption properties. The gas storage materials find utility in any number of gas storage applications. Methods for making the gas storage materials are also disclosed.

The present application is directed to methods for preparation of carbon materials. The carbon materials comprise enhanced electrochemical properties and find utility in any number of electrical devices, for example, as electrode material in ultracapacitors or batteries.

Provided is a negative electrode material for a lithium-ion secondary battery capable of providing a high capacity lithium-ion secondary battery. A negative electrode material for a lithium-ion secondary battery containing a composite (C) that contains a porous carbon (A) and a Si-containing compound (B), wherein the porous carbon (A) satisfies V 1 /V 0 >0.80 and V 2 /V 0 <0.10, when a total pore volume at the maximum value of a relative pressure P/P 0 is defined as V 0 and P 0 is a saturated vapor pressure, a cumulative pore volume at a relative pressure P/P 0 =0.1 is defined as V 1 , and a cumulative pore volume at a relative pressure P/P 0 =10 −7 is defined as V 2 in a nitrogen adsorption test, and has a BET specific surface area of 800 m 2 /g or more; and wherein the Si-containing compound (B) is contained in pores of the porous carbon (A).

The present application is directed to methods for solvent-free preparation of polymers and their subsequent processing into activated carbon materials. These methods unexpectedly demonstrate ability to tune pore structure in the polymer gel and carbon produced there from, while also providing distinct advantages over the current art.

Passivated silicon-carbon composite materials and related processes are disclosed that overcome the challenges for providing amorphous nano-sized silicon entrained within porous carbon. Compared to other, inferior materials and processes described in the prior art, the materials and processes disclosed herein find superior utility in various applications, including energy storage devices such as lithium ion batteries.

Disclosed herein are silicon-carbon composite mixtures containing a first silicon-carbon composite material including a porous carbon scaffold containing micropores and mesopores and a total pore volume no less than 0.5 cm 3 /g, a silicon content from 30% to 70% and a plurality of particles having a Dv50 of 6 μm to 20 μm; as well as at least a second silicon-carbon composite material including at least a second carbon scaffold containing micropores and mesopores and a total pore volume no less than 0.5 cm 3 /g, a silicon content from 30% to 70%, and a plurality of particles having a Dv50 of 1 μm to 6 μm; and 10% to 90% by mass of the first silicon-carbon composite material and 10% to 90% of the at least one further silicon-carbon composite material. Also disclosed herein are methods of manufacturing silicon-carbon composite mixtures, methods of manufacturing anode electrodes containing a silicon-carbon composite mixture, and methods of manufacturing electrochemical energy storage devices containing a silicon-carbon composite mixture.