Atlanta, GA, United States
Atlanta, GA, United States

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Patent
Sila Nanotechnologies Inc | Date: 2015-04-29

Battery electrode compositions are provided for use in aqueous electrolytes and may comprise, for example, a current collector, active particles, and a conformal, metal-ion permeable coating. The active particles may be electrically connected to the current collector, and provided to store and release metal ions of an active material during battery operation. The conformal, metal-ion permeable coating may at least partially encase the surface of the connected active particles, whereby the conformal, metal-ion permeable coating impedes (i) direct electrical contact of an aqueous electrolyte with the active particles and (ii) aqueous electrolyte decomposition during battery operation. Such electrode compositions and corresponding aqueous batteries may facilitate the incorporation of advanced material synthesis and electrode fabrication technologies, and enable fabrication of high voltage and high capacity aqueous batteries at a cost lower than that of conventional metal-ion battery technology.


Patent
Sila Nanotechnologies Inc | Date: 2015-05-07

Batteries such as Li-ion batteries are provided that comprise anode and cathode electrodes, an electrolyte ionically coupling the anode and the cathode, and a separator electrically separating the anode and the cathode. In some designs, the electrolyte may comprise, for example, a mixture of (i) a Li-ion salt with (ii) at least one other metal salt having a metal with a standard reduction potential below 2.3 V vs. Standard Hydrogen Electrode (SHE). In other designs, the electrolyte may be disposed in conjunction with an electrolyte solvent that comprises, for example, about 10 to about 100 wt. % ether. In still other designs, the battery may further comprise anode and cathode interfacial layers (e.g., solid electrolyte interphase (SEI)) disposed between the respective electrode and the electrolyte and having different types of fragments of electrolyte solvent molecules as compared to each other.


Patent
Sila Nanotechnologies Inc | Date: 2014-03-21

A battery electrode composition is provided comprising anode and cathode electrodes and an electrolyte ionically coupling the anode and the cathode. At least one of the electrodes may comprise a plurality of active material particles provided to store and release ions during battery operation. The electrolyte may comprise an aqueous metal-ion electrolyte ionically interconnecting the active material particles. Further, the plurality of active material particles may comprise a conformal, metal-ion permeable coating at the interface between the active material particles and the aqueous metal-ion electrolyte. The conformal, metal-ion permeable coating impedes water decomposition at the aforesaid at least one of the electrodes.


Patent
Sila Nanotechnologies Inc | Date: 2015-10-13

Battery electrode compositions and methods of fabrication are provided that utilize composite particles. Each of the composite particles may comprise, for example, a high-capacity active material and a porous, electrically-conductive scaffolding matrix material. The active material may store and release ions during battery operation, and may exhibit (i) a specific capacity of at least 220 mAh/g as a cathode active material or (ii) a specific capacity of at least 400 mAh/g as an anode active material. The active material may be disposed in the pores of the scaffolding matrix material. According to various designs, each composite particle may exhibit at least one material property that changes from the center to the perimeter of the scaffolding matrix material.


A battery electrode composition is provided that comprises composite particles. Each composite particle may comprise, for example, active fluoride material and a nanoporous, electrically-conductive scaffolding matrix within which the active fluoride material is disposed. The active fluoride material is provided to store and release ions during battery operation. The storing and releasing of the ions may cause a substantial change in volume of the active material. The scaffolding matrix structurally supports the active material, electrically interconnects the active material, and accommodates the changes in volume of the active material.


A Li-ion battery cell, among other materials, components, and techniques, is provided that includes ion-permeable anode and cathode electrodes, an electrolyte ionically coupling the anode and the cathode, a separator electrically separating the anode and the cathode, and a sacrificial, high-capacity Li composition for providing Li to at least one of the electrodes.


Patent
Georgia Institute of Technology and Sila Nanotechnologies Inc | Date: 2014-10-14

Described herein are improved composite anodes and lithium-ion batteries made therefrom. Further described are methods of making and using the improved anodes and batteries. In general, the anodes include a porous composite having a plurality of agglomerated nanocomposites. At least one of the plurality of agglomerated nanocomposites is formed from a dendritic particle, which is a three-dimensional, randomly-ordered assembly of nanoparticles of an electrically conducting material and a plurality of discrete non-porous nanoparticles of a non-carbon Group 4A element or mixture thereof disposed on a surface of the dendritic particle. At least one nanocomposite of the plurality of agglomerated nanocomposites has at least a portion of its dendritic particle in electrical communication with at least a portion of a dendritic particle of an adjacent nanocomposite in the plurality of agglomerated nanocomposites.


Patent
Sila Nanotechnologies Inc | Date: 2016-07-13

A battery electrode composition is provided that comprises composite particles. Each composite particle may comprise, for example, active lithium fluoride/metal nanocomposite material optionally embedded into a nanoporous, electrically-conductive skeleton matrix material particle(s), where each of these composite particles is further encased in a Li-ion permeable, chemically and mechanically robust, protective outer shell that is impermeable to electrolyte solvent molecules. The active lithium fluoride/metal nanocomposite material is provided to store and release Li ions during battery operation.


Patent
Sila Nanotechnologies Inc | Date: 2014-12-09

A battery electrode composition is provided comprising core-shell composites. Each of the composites may comprise a core and a multi-functional shell.


Metal-ion battery cells are provided that take advantage of the disclosed doping process. The cells may be fabricated from anode and cathode electrodes, a separator, and an electrolyte. A metal-ion additive may be incorporated into (i) one or more of the electrodes, (ii) the separator, or (iii) the electrolyte. The metal-ion additive provides additional donor ions corresponding to the metal ions stored and released by anode and cathode active material particles. An activation potential may then be applied to the anode and cathode electrodes to release the additional donor ions into the battery cell.

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