A system for electrical energy production from chemical reagents in a compartmentalized cell includes: at least two electrodes, comprising at least one anode and at least one cathode; at least one separator, that separates the anodes and the cathodes; and an ionic liquid electrolyte system. The system can be a battery or one or more cells of a battery system. The ionic liquid electrolyte system comprises an ionic liquid solvent; an ether co-solvent, comprising a minority fraction, by weight, of the electrolyte; and a lithium salt. In preferred variations, the anode is a lithium metal anode and the cathode is a metal oxide cathode and the separator is a polyolefin separator.

This application relates to an electrochemical device and an electronic device containing same. The electrochemical device includes: a positive electrode, a negative electrode, a separator, an adhesive layer, and a lithium compound layer. The negative electrode includes a negative active material layer. The separator is disposed between the positive electrode and the negative electrode. The adhesive layer is disposed between the negative active material layer and the separator. The lithium compound layer is disposed between the adhesive layer and the negative active material layer. The lithium compound layer includes at least one of lithium carbonate or lithium oxide. In this application, the adhesive layer is disposed between the separator and the negative electrode to effectively enhance the adhesive ability of the negative electrode to the separator after a lithium supplement process, alleviate deformation of the negative electrode due to volume expansion during charge-and-discharge cycles, and avoid detachment from the separator.

A battery is provided. The battery includes a negative electrode including a first coating portion coated with a negative electrode active material and a first uncoated portion disposed adjacent to the first coating portion, a positive electrode disposed to face the negative electrode and including a second coating portion coated with a positive electrode active material and a second uncoated portion disposed adjacent to the second coating portion, a first separator disposed between one surface of the negative electrode and one surface of the positive electrode, and a second separator disposed on another surface of the negative electrode. The positive electrode, the negative electrode, and the at least one of the first separator and the second separator may be prepared in a roll shape formed by winding.

A separator for a rechargeable battery includes a porous substrate and a heat resistance layer on at least one surface of the porous substrate. The heat resistance layer includes an acryl-based copolymer, an alkali metal, and a filler. The acryl-based copolymer includes a unit derived from (meth)acrylate or (meth)acrylic acid, a cyano group-containing unit, and a sulfonate group-containing unit.

A disclosed film electrode includes an electrode base, and an active material layer formed on the electrode base, and a resin layer adhering to at least one of a peripheral portion of the active material layer and a surface of the active material layer in a direction extending along a plane of the electrode base.

Embodiments of the application provide an electrode assembly, a battery cell, a battery and an electric device. The electrode assembly in the embodiments of the application includes a positive pole piece and a negative pole piece, the positive pole piece and the negative pole piece are wound in a winding direction to form a winding structure including a bent region. The positive pole piece and the negative pole piece each includes a plurality of bent portions located in the bent region, at least one of the bent portions in the positive pole piece is a first bent portion and at least one of the bent portions in the negative pole piece is a second bent portion adjacent to the first bent portion. The electrode assembly is provided with a first barrier. The application can improve the safety performance of the battery cell.

An electrode assembly includes: a plurality of positive electrodes and a plurality of negative electrodes, alternately and repeatedly stacked; a separator between the positive electrodes and the negative electrodes, respectively, to protrude from the positive electrodes and the negative electrodes and stacked such that surfaces at edges of the separator face each other; and a fixing member including an adhesive layer adhered to the surfaces of the separator.

Systems and methods are provided for configuring cell performance using specific anode, cathode, and separator combinations. Separators with significant adhesive properties may be used in forming rechargeable cells, such as lithium-ion cells. The separator with significant adhesive properties may include an adhesive coating, applied on one or both sides of the separator, and/or adhesive material is dissolved or deposited within the separator. The separators with significant adhesive properties may also include one or more ceramic layers.

A coated hybrid electrode for a composite solid-state battery cell is disclosed. Systems and methods are further provided for forming an electrolyte coating including a solid ionically conductive polymer material in the coated hybrid electrode. In one example, the coated hybrid electrode can include an anode material coating, the solid polymer electrolyte coating, and a cathode material coating, such that the solid polymer electrolyte coating can function as a separator coating between the anode material coating and the cathode material coating, thus eliminating a need for a conventional battery separator. In some examples, a slurry-based coating process can be utilized for forming the solid polymer electrolyte coating. As such, the solid polymer electrolyte coating can be mechanically robust with uniform thickness. Further, a battery cell can be formed by utilizing a sub-assembly stacking technique to provide battery cell stiffness and increase precision and accuracy of coating.

An adhesive-coated separator for a lithium-ion battery, a preparation method thereof, and use thereof are disclosed. The adhesive-coated separator for a lithium-ion battery of the present disclosure includes a base membrane and an adhesive coating formed on a surface of the base membrane, the thickness deviation percentage of the adhesive coating is less than or equal to 10%, the thickness deviation percentage=(D.sub.max−D.sub.min)/D.sub.ave×100%, D.sub.max is a maximum value of the thickness of the adhesive coating, D.sub.min is a minimum value of the thickness of the adhesive coating, and D.sub.ave is an average value of the thickness of the adhesive coating.