An electrochemical cell is provided which includes a cathode, an anode, an electrolyte separator, and an anode current collector located on the anode. The anode is a three-dimensional (3D) porous anode including ionically conducting electrolyte strands and pores which extend through the anode from the anode current collector to the electrolyte separator. The anode also includes electronically conducting networks extending on sidewall surfaces of the pores from the anode current collector to the electrolyte separator.

An electrode manufacturing method includes (a) preparing a first electrode including a first current collector and a first active material layer, (b) separating the first current collector and the first active material layer, (c) processing the first active material layer into wet particles, (d) shaping the wet particles into a second active material layer and (e) disposing the second active material layer on a surface of a second current collector, thereby manufacturing a second electrode. The first active material layer includes an active material and a binder. The second active material layer includes the active material and the binder.

An active material for an electrochemical device wherein a surface of the active material is modified by a surface modification agent, wherein the surface modification agent is an organometallic compound.

Provided herein is a method of manufacturing a nanoscale coated network, which includes providing nanofibers, capable of forming a network in the presence of a liquid vehicle and providing a nanoscale solid substance in the presence of the liquid vehicle. The method may also include forming a network of the nanofibers and the nanoscale solid substance and redistributing at least a portion of the nanoscale solid substance within the network to produce a network of nanofibers coated with the nanoscale solid substance. Also provided herein is a nanoscale coated network with an active material coating that is redistributed to cover and electrochemically isolate the network from materials outside the network.

The present invention relates to a cathode active material including a lithium-containing transition metal oxide and two or more metal composite oxide layers selected from the group consisting of Chemical Formulae 1 to 3 which are coated on the surface of the lithium-containing transition metal oxide, a method of manufacturing the same, and a cathode for a secondary battery including the cathode active material,

[Chemical Formula 1]

M(C.sub.2H.sub.5O.sub.2).sub.n

[Chemical Formula 2]

M(C.sub.6H.sub.(8-n)O.sub.7)

[Chemical Formula 3]

M(C.sub.6H.sub.(8-n)O.sub.7)(C.sub.2H.sub.5O.sub.2)

(where M, as a metal desorbed from a metal precursor, represents at least one metal selected from the group consisting of Mg, Ca, Sr, Ba, Y, Ti, Zr, V, Nb, Ta, Cr, Mo, W, Mn, Fe, Co, Ir, Ni, Zn, Al, Ga, In, Si, Ge, Sn, La, and Ce, and n is an integer between 1 and 4).

A method for producing a lithium-ion cell is provided. The electrochemically active coating of an electrode is brought into contact with an electrolyte or an auxiliary liquid before a winding or cutting operation. This method is suitable in particular for continuously producing lithium-ion cells by means of processes proceeding at high speed, such as winding processes.

A negative electrode active material for a non-aqueous electrolyte secondary battery, including negative electrode active material particles containing a silicon compound (SiO.sub.x where 0.5≦x≦1.6), the negative electrode active material particles being coated with a carbon coating composed of a substance at least partially containing carbon, the carbon coating having a density ranging from 1.2 g/cm.sup.3 to 1.9 g/cm.sup.3, the negative electrode active material particles having a characteristic of type II or type III adsorption-desorption isotherm in the IUPAC classification, as obtained by adsorption-desorption isotherm measurement with nitrogen gas. This negative electrode active material can increase the battery capacity and improve the cycle performance and battery initial efficiency.

The invention concerns a method for manufacturing of a battery electrode material comprising the steps of: a) applying an electric field to at least one polymer, conductive particles and at least one solvent whereby said conductive particles become arranged between the electrodes in at least two lines that are oriented in the same direction as the electric field line, and b) stabilizing the at least one polymer, conductive particles and at least one solvent by removing at least some of said at least one solvent while maintaining the electric field in step a) whereby the at least two lines of conductive particles will remain in their position when said electric field is removed. Further, the invention concerns a battery electrode material comprising at least one polymer and conductive particles, wherein said conductive particles form at least two lines that are oriented parallel and/or co-linear to each other.

A method for preparing self-supporting flexible electrodes is provided using refined cellulose fibers as binder. The negative or positive self-supporting flexible electrode is obtained by such method. A Li-ion battery is also provided in which at least one electrode is a self-supporting flexible electrode.

The present disclosure provides a prelithiated negative electrode, a preparation method thereof, and a lithium ion battery and a supercapacitor comprising the same. The prelithiated negative electrode comprises: an electrode film which is a solvent-free film-like negative electrode material composed of a negative electrode active material, a lithium-skeleton carbon composite material, a binder and optionally a conductive additive; and a metal current collector, wherein the electrode film is bonded on the metal current collector through a conductive adhesive. The present disclosure provides an effective method of prelithiating a negative electrode, and can effectively improve the first cycle efficiency of a lithium battery comprising a silicon-carbon negative electrode, contributing to increasing the specific capacity and cycle life of the battery. The present disclosure can also increase the energy density of a supercapacitor.