Patents Assigned to POSI ENERGY-SILICON POWER, LLC
  • Publication number: 20240102201
    Abstract: An element to be used as an anode in a lithium-ion battery comprising a lithiated single crystal porous-silicon layer made on the surface of a p-doped single crystal Si of thickness 25-1000 mm and resistivity of less than 0.01-ohm cm. Successful lithiation is achieved either electrochemically or by direct alloying of lithium metal with the porous-Si with a wide range of porosities. The lithiated silicon anode allows a high cathode loading in a lithium-ion battery resulting in record current densities without the formation of lithium dendrites.
    Type: Application
    Filed: September 24, 2022
    Publication date: March 28, 2024
    Applicant: POSI ENERGY-SILICON POWER LLC
    Inventors: DEVENDRA K SADANA, Joel P. de Souza, Brain Williams, Francis Christpher Farmer
  • Publication number: 20230420664
    Abstract: An element to be used as an anode in a lithium-ion battery comprising an electrochemically lithiated thick or thin p or n-doped virgin single crystal Si with or without an oxide on the upper surface thereof. The lithiated structure further has a plurality of single crystalline p or n-doped Si particles dispersed over a non-lithium reactive reacting electrically conductive adhesive positioned atop a current collector.
    Type: Application
    Filed: September 24, 2022
    Publication date: December 28, 2023
    Applicant: Posi Energy- Silicon Power. LLC
    Inventors: Devendra K. Sadana, Joel P. De Souza, Brian Williams, Francis Christopher Farmer
  • Publication number: 20230006194
    Abstract: Embodiments of this invention include different configuration of lithium batteries that have a cathode made of a lithium containing material, an anode, and an electrolyte/separator between the cathode and anode. The thin anode includes an anode current collector and a nucleation layer on the anode current collector surface that can include one or more thin a semiconductor layers made of a porous, single crystalline, semiconductor, e.g., silicon. A thin semiconductor layer has a layer thickness between 50 nanometers (nm) to 20 micrometers (?m). Configurations of single layer arrays of batteries in variations of electrical series and parallel connections are disclosed along with stacking single and multiple layer arrays (stacks) to form energy storage devices. The energy storage devices are flexible and can store high levels of energy per volume and/or weight. The energy storage devices can be formed into different physical configurations including encased stacked layers (e.g.
    Type: Application
    Filed: July 2, 2021
    Publication date: January 5, 2023
    Applicant: POSI ENERGY-SILICON POWER, LLC
    Inventor: Devendra K. Sadana
  • Publication number: 20220223848
    Abstract: Methods for minimizing or eliminating cracks in the crystalline porous-Si structure that can occur during the layer release process and/or during subsequent processing in a lithium-ion battery during charge and discharge cycles. The methods include: modifying the anodic etching process so that a freestanding film of Si with the anode structure is detached from a p-doped substrate; depositing a conductive layer on the back surface of the released porous-Si structure with or without a metallic seed layer ; mechanically or chemically thinning the back surface of the Si substrate after forming the porous-Si at the front surface of a thick Si substrate; forming a thin crystalline porous-Si anode structure on a p-doped silicon epitaxy grown on porous-Si with a porous-Si release layer.
    Type: Application
    Filed: December 10, 2021
    Publication date: July 14, 2022
    Applicant: POSI ENERGY-SILICON POWER, LLC
    Inventor: Devendra K Sadana