The present invention relates to a lithium secondary battery comprising: a current collector comprising a structure in a fabric form in which fiber bundles are cross-woven, wherein each of the fiber bundles is formed of sets of fiber yarns and each of the fiber yarns includes a polymer fiber and a metal layer surrounding the polymer fiber; and an electrode including an active material layer disposed on at least one surface of the current collector.

A rechargeable lithium-sulfur cell comprising a cathode, an anode, a separator electronically separating the two electrodes, a first electrolyte in contact with the cathode, and a second electrolyte in contact with the anode, wherein the first electrolyte contains a first concentration, C.sub.1, of a first lithium salt dissolved in a first solvent when the first electrolyte is brought in contact with the cathode, and the second electrolyte contains a second concentration, C.sub.2, of a second lithium salt dissolved in a second solvent when the second electrolyte is brought in contact with the anode, wherein C.sub.1 is less than C.sub.2. The cell exhibits an exceptionally high specific energy and a long cycle life.

A flexible and stretchable fabric based electrode-polymer electrolyte battery described herein comprises at least one electrochemical cell. The electrochemical cell comprises a first stretchable electrode having a first active material coupled with a first stretchable fabric current collector, a second stretchable electrode having a second active material coupled with a second stretchable fabric current collector, a stretchable separator configured between the first and second electrodes, and at least one stretchable encapsulant material, wherein the stretchable material encapsulates the electrochemical cell and is capable of reversible bending, twisting, folding and stretching.

Electroactive materials having a nitrogen-containing carbon coating and composite materials for a high-energy-density lithium-based, as well as methods of formation relating thereto, are provided. The composite electrode material includes a silicon-containing electroactive material having a substantially continuous nitrogen-containing carbon coating formed thereon. The method includes contacting the silicon-containing electroactive material and one or more nitrogen-containing precursor materials and heating the mixture. The one or more nitrogen-containing precursor materials include one or more nitrogen-carbon bonds and during heating the nitrogen of the one or more nitrogen-carbon bonds with silicon in the silicon-containing electroactive material to form the nitrogen-containing carbon coating on exposed surfaces of the silicon-containing electroactive material.

An electrolyte composition and a metal-ion battery employing the same are provided. The electrolyte composition includes a metal halide, a solvent, and an additive. The solvent is an ionic liquid or organic solvent. The molar ratio of the metal halide to the solvent is from 1:1 to 2.2:1. The amount of additive is from 1 wt % to 25 wt %, based on the total weight of the metal halide and the solvent. The additive is monochloroethane, trichlorethylene, dichloroethane, trichloroethane, phosphorus trichloride, phosphorus pentachloride, methyl pyidine, methyl nicotinate, or a combination thereof.

Provided is a stacked electrode assembly including: a lowermost electrode arranged on a lowermost portion of the stacked electrode assembly; an uppermost electrode arranged on an uppermost portion of the stacked electrode assembly; at least one unit stacked body arranged between the lowermost electrode and the uppermost electrode and including a positive electrode, a negative electrode, and a separator, the separator being arranged between the positive electrode and the negative electrode; and a separator arranged between the lowermost electrode and the at least one unit stacked body, and between the at least one unit stacked body and the uppermost electrode. A capacity and energy density of a lithium battery may be improved by employing an electrode including a mesh electrode current collector as the lowermost electrode or the uppermost electrode of the stacked electrode assembly.

A system and method for an energy storage device including a first electrode and a second electrode; the second electrode including a cobalt based compound; and an electrolyte disposed between the first electrode and the second electrode.

An electrode comprising galvanic membranes having a thickness defined by an average length of vectors normal to a membrane first surface and extending to where said vectors intersect a membrane uncompressed second surface; a non-porous metal sheet having first and second surfaces; a non-porous dielectric sheet having first and second surfaces; square weave metal wire screens having a wire diameter slightly greater than one half the at least one galvanic membrane thickness dimension; wherein, at least one galvanic membrane is adjacent the metal wire screen on the at least one galvanic membrane first and second surfaces in a stack of membranes and screens; the metal wire screen is adjacent the first surface of the non-porous dielectric sheet; the second surfaces of non-porous metal sheets have a sustained pressure of at least 7 million Pascal; and; the metal wire screen is collectively in incompressible vertical alignment with another metal wire screen.

A fuel electrode incorporates a first and second corrugated portion that are attached to each other at offset angles respect to their corrugation axis and therefore reinforce each other. A first corrugated portion may extend orthogonally with respect to a second corrugated portion. The first and second corrugated portions may be formed from metal wire and may therefore have a very high volumetric void fraction and a high surface area to volume ratio (sa/vol). In addition, the strands of the wire may be selected to enable high conductivity to the current collectors while maximizing the sa/vol. In addition, the shape of the corrugation, including the period distance, amplitude and geometry may be selected with respect to the stiffness requirements and electrochemical cell application factors. The first and second corrugated portions may be calendared or crushed to reduce thickness of the fuel electrode.

Disclosed is a modular multi-cell battery, comprising: a battery core comprising a plurality of bipolar plates, a positiveterminal polar plate, a negative-terminal polar plate and a membrane; a pressure frame; a pressure cover plate cooperating with the pressure frame to fix the battery core by means of press fitting; and a battery box and a battery cover for encapsulating the battery core fixed by means of press fitting by the pressure frame and the pressure cover plate. The positive-terminal polar plate, the bipolar plate and the negative-terminal polar plate are placed horizontally and alternately, wherein the membrane is placed between various upper and lower polar plates. The present application has new features of high specific energy, high-power charging and discharging, a strong anti-vibration capacity, a long life cycle, etc., and these advantages are all incomparable to the existing conventional battery technology; moreover, the present application further ensures that other excellent performances of a conventional lead-acid battery are not affected, and some performances reach the level of lithium batteries.