87results about "Microscopic fiber electrodes" patented technology

A composite composition for electrochemical cell electrode applications, the composition comprising multiple solid particles, wherein (a) a solid particle is composed of graphene platelets dispersed in or bonded by a first matrix or binder material, wherein the graphene platelets are not obtained from graphitization of the first binder or matrix material; (b) the graphene platelets have a length or width in the range of 10 nm to 10 μm; (c) the multiple solid particles are bonded by a second binder material; and (d) the first or second binder material is selected from a polymer, polymeric carbon, amorphous carbon, metal, glass, ceramic, oxide, organic material, or a combination thereof. For a lithium ion battery anode application, the first binder or matrix material is preferably amorphous carbon or polymeric carbon. Such a composite composition provides a high anode capacity and good cycling response. For a supercapacitor electrode application, the solid particles preferably have meso-scale pores therein to accommodate electrolyte.

The invention belongs to the technical field of micro energy storage devices, in particular to a stretchable linear supercapacitor, a lithium ion battery and a preparation method thereof. The present invention first prepares a spring-like oriented carbon nanotube fiber, which can be stretched over 300% by twisting to form a helical shape, and then uses this fiber as an electrode to construct a stretchable supercapacitor; this fiber can be further combined with Lithium manganate and lithium titanate nanoparticles are combined to form composite fibers, which serve as positive and negative electrodes, respectively, to construct a stretchable lithium-ion battery. Compared with other micro-devices, the linear stretchable supercapacitor and lithium-ion battery obtained by the present invention have a brand-new structure, and can realize stretchability without an elastic substrate, which reduces the weight and volume of the device, thereby improving the performance of the device. The specific capacity and energy density are important innovations in the field of micro-devices; at the same time, the device has good flexibility and is easy to prepare and integrate, so it has good application prospects.

Disclosed is a method for efficiently producing a plurality of fiber electrodes simultaneously from a plurality of fibers, which takes advantage of the advantages that fiber electrodes conventionally have. The method for producing fiber electrodes has steps (2,2a) for opening a bundle of fibrous material, steps (3,4,5) for obtaining a fiber cathode or a fiber anode by means of forming a cathode active material coat layer or an anode active material coat layer on each monofilament obtained by means of opening, and steps (6,6a) for forming a separator coat layer on the abovementioned fiber cathode or fiber anode.

Provided are electrode layers for use in rechargeable batteries, such as lithium ion batteries, and related fabrication techniques. These electrode layers have interconnected hollow nanostructures that contain high capacity electrochemically active materials, (such as silicon, tin, and germanium). In certain embodiments, a fabrication technique involves forming a nanoscale coating around multiple template structures and at least partially removing and / or shrinking these structures to form hollow cavities. These cavities provide space for the active materials of the nanostructures to swell into during battery cycling. This design helps to reduce the risk of pulverization and to maintain electrical contacts among the nanostructures. It also provides a very high surface area available ionic communication with the electrolyte.; The nanostructures have nanoscale shells but may be substantially larger in other dimensions. Nanostructures can be interconnected during forming the nanoscale coating, when the coating formed around two nearby template structures overlap.

A battery on a conductive metal wire and components of a battery on a conductive metal wire of circular cross section diameter of 5-500 micrometers and methods of making the battery and battery components are disclosed. In one embodiment, the battery features a porous anode or cathode layer which assist with ion exchange in batteries. Methods of forming the porous anode or cathode layer include deposition of an inert gas or hydrogen enriched carbon or silicon layer on a heated metal wire followed by annealing of the inert gas or hydrogen enriched carbon silicon layer. Energy storage devices having bundles of batteries on wires are also disclosed as are other energy storage devices.

A printed 3D functional part includes a 3D structure comprising a structural material, and at least one functional electronic device is at least partially embedded in the 3D structure. The functional electronic device has a base secured against an interior surface of the 3D structure. One or more conductive filaments are at least partially embedded in the 3D structure and electrically connected to the at least one functional electronic device.

A composite anode active material, an anode including the composite anode active material, a lithium battery including the anode, and a method of preparing the composite anode active material. The composite anode active material includes: a shell including a hollow carbon fiber; and a core disposed in a hollow of the hollow carbon fiber, wherein the core includes a first metal nanostructure and a conducting agent.