University of Michigan

University of California

Massachusetts Institute of Technology

Georgia Tech Research Corporation

Advanced Ceramics Research, Inc.

Adaptive Materials, Inc.

John William Halloran

Yet-Ming Chiang

Anthony C Mulligan

Aaron T Crumm

Mark J Rigali

Manish P Sutaria

Chang-Jun Bae

Suman Das

Dragan Popovich

K Ranji Vaidyanathan

Antoni P Tomsia

Michael L Fulcher

Can K Erdonmez

Qiang Fu

Kenneth L Knittel

Timothy LaBreche

Scott R Somers

Gregory E Hilmas

Tien-Min Chu

Shaowu Zha

Michelle Griffith

Gregory Zywicki

Andrew Barda

Guy Allen Brady

Dragan Popovic'

Porous electrodes in which the porosity has a low tortuosity are generally provided. In some embodiments, the porous electrodes can be designed to be filled with electrolyte and used in batteries, and can include low tortuosity in the primary direction of ion transport during charge and discharge of the battery. In some embodiments, the electrodes can have a high volume fraction of electrode active material (i.e., low porosity). The attributes outlined above can allow the electrodes to be fabricated with a higher energy density, higher capacity per unit area of electrode (mAh/cm), and greater thickness than comparable electrodes while still providing high utilization of the active material in the battery during use. Accordingly, the electrodes can be used to produce batteries with high energy densities, high power, or both compared to batteries using electrodes of conventional design with relatively highly tortuous pores.

Controlled porosity in electrodes

Systems and methods for fabricating three-dimensional objects are disclosed. The system includes an optical imaging system providing a light source; a photosensitive medium adapted to change states upon exposure to a portion of the light source from the optical imaging system; a control system for controlling movement of the optical imaging system, wherein the optical imaging system moves continuously above the photosensitive medium. The method includes moving a maskless optical imaging system providing the light beam in a continuous sequence; presenting the light beam on a portion of the photosensitive medium; lowering a plate upon which the photosensitive medium resides; and applying a new layer of the photosensitive medium.

Systems and methods for fabricating three-dimensional objects

Systems and methods for fabricating three-dimensional objects. The system includes an optical imaging system providing a light source; a photosensitive medium adapted to change states upon exposure to a portion of the light source from the optical imaging system; a control system for controlling movement of the optical imaging system, wherein the optical imaging system moves continuously above the photosensitive medium. The method includes moving a maskless optical imaging system providing the light beam in a continuous sequence; presenting the light beam on a portion of the photosensitive medium; lowering a plate upon which the photosensitive medium resides; and applying a new layer of the photosensitive medium.

A fuel cell stack configured to input raw fuel from a fuel source to produce electrical energy includes a fuel cell comprising an anode, an electrolyte, and a cathode. The anode defines an anode chamber, and a hydrogen separation member is disposed within the anode chamber. The hydrogen separation member has a first side and a second side. The first side of the hydrogen separation member defines a raw fuel chamber. The hydrogen separation member transfer hydrogen between the first side and the second side to provide hydrogen fuel to the anode of the fuel cell, while inhibiting the transportation of gas molecules between the first side and the second side.

Fuel cell system having a hydrogen separation member

Fibrous monolith processing techniques to fabricate multifunctional structures capable of performing more than one discrete function such as structures capable of bearing structural loads and mechanical stresses in service and also capable of performing at least one additional non-structural function.

Multi-functional composite structures

A method for preparation of a solid state electrochemical device having a cathode, and anode and an electrolyte positioned between the cathode and the anode is disclosed, comprising the steps of forming a controlled geometry feedrod having a cross sectional area, having at least a first extrusion compound and a second extrusion compound, and co-extruding the controlled geometry feedrod through a reduction die at least once to achieve a desired reduction in cross sectional area. Such microfabrication by thermoplastic co-extrusion enhances production of complex and multiphase electrodes and electrolytes.

Method for preparation of solid state electrochemical device

Photocurable ceramic resins having solids loadings in excess of 40 volume percent and a viscosity of less than 3000 mPa.multidot.s are suitable for multi-layer fabrication of green ceramic parts by stereolithography and similar techniques. The green ceramic parts, which may be of traditional ceramic materials, sinterable metals, or combinations thereof, exhibit low shrinkage upon firing or sintering, and may be used for such applications as rapid prototyping, biocompatible ceramic parts, ceramic cores for investment casting, ceramic molds for metal casting, and the like.

Stereolithography resin for rapid prototyping of ceramics and metals

A method for the preparation of a fibrous monolithic ceramic which exhibits non-brittle fracture characteristics from green monofilament ceramic fibers having a controlled texture. This method includes the steps of: (a) forming a first ceramic-laden composition includes a thermoplastic polymer and at least about 40 vol. % of a ceramic particulate into a substantially cylindrical core, (b) applying a layer of a second ceramic-laden composition includes a thermoplastic polymer and at least about 40 vol. % of a ceramic particulate which differs from the particulate contained in the first composition onto the core to form a substantially cylindrical feed rod having an average initial diameter, (c) extruding the feed rod to form a green ceramic monofilament fiber which has an average diameter that is less than the average diameter of the feed rod, and (e) arranging the green ceramic monofilament fibers into a desired configuration to provide a green fibrous monolith, wherein, during the extrusion step, each ceramic-laden composition has a viscosity which is approximately equivalent to that of each other ceramic-laden composition, and, if the ceramics present in the extruded ceramic monofilament fiber are sintered, a plane of weakness defined by the interface of the core and the layer is provided, the interface being relatively weaker than the core. The green fibrous monolith may be sintered to provide a fibrous monolith.

Process for preparing textured ceramic composites

Growing community of inventors

Ann Arbor, MI, United States of America

John William Halloran