A doped electrode may be manufactured by doping an active material included in an electrode with an alkali metal in a dope solution containing a first aprotic solvent and an alkali metal salt. The doped electrode may be cleaned with a cleaning solution containing a second aprotic solvent that has a boiling point lower than that of the first aprotic solvent. The cleaning solution may be controlled such that a content ratio of the first aprotic solvent in the cleaning solution is 8 vol % or lower.

A doped electrode may be manufactured by doping an active material included in an electrode with an alkali metal in a dope solution containing a first aprotic solvent and an alkali metal salt. The doped electrode may be cleaned with a cleaning solution containing a second aprotic solvent that has a boiling point lower than that of the first aprotic solvent. The cleaning solution may be controlled such that a content ratio of the first aprotic solvent in the cleaning solution is 8 vol % or lower.

A coating method has: a first step for mixing an active material, a binding agent, and a solvent, and obtaining a mixed slurry; a second step for adding an additive to the mixed slurry, stirring the mixed slurry and the additive, and obtaining a coating slurry and a third step for intermittently coating the coating slurry on a collector body, and forming a coated part and a non-coated part. In the second step, the addition amount of the additive is set in accordance with a preset coating speed of the coating slurry, or the weight of the coated part, and the additive includes castor oil, cellulose nanofibers, modified silicone, an amide, polyethylene oxide, propylene glycol monomethyl ether acetate, polyamine, and/or polycarboxylic acid.

A double-sided coating device includes: a conveying mechanism for a base material that includes a first surface and a second surface; a first die that applies a first coating material onto the first surface; and a second die that applies a second coating material onto the second surface. The conveying mechanism includes: a roll that conveys the base material, in which the position at which the base material separates from the circumferential surface is higher than a target coating height of the base material; and a drawing section that draws the base material such as to bring the base material closer to the target coating height.

A double-sided coating device includes: a conveying mechanism for a base material that includes a first surface and a second surface; a first die that applies a first coating material onto the first surface; and a second die that applies a second coating material onto the second surface. The conveying mechanism includes: a roll that conveys the base material, in which the position at which the base material separates from the circumferential surface is higher than a target coating height of the base material; and a drawing section that draws the base material such as to bring the base material closer to the target coating height.

The present invention relates to a battery cell with improved safety and a method of manufacturing the same, and more particularly a battery cell configured such that an electrode assembly including a positive electrode (200) and a negative electrode (300) located so as to be opposite each other in the state in which a separator (400) is interposed therebetween is received in a cell case (100), wherein the positive electrode (200) includes a positive electrode plate (210) and a positive electrode active material layer (220) provided on one surface and/or the other surface of the positive electrode plate (210), the negative electrode (300) includes a negative electrode plate (310) and a negative electrode active material layer (320) provided on one surface and/or the other surface of the negative electrode plate (310), the positive electrode active material layer (220) includes a first flat portion (221) and a first inclined portion (222) provided at each of opposite sides of the first flat portion (221), and the negative electrode active material layer (320) includes a second flat portion (321) and a second inclined portion (322) provided at each of opposite sides of the second flat portion (321) and a method of manufacturing the same.

An electrode rolling apparatus a for rolling an electrode substrate having a coated portion and an uncoated portion includes a coil section having an effective region where a uniform magnetic field is generated; and an electrode rolling section for rolling the electrode substrate, wherein the coated portion and the uncoated portion each comprise a plurality of pattern portions, the uncoated portion comprising a first uncoated pattern portion located on at least one end of opposing ends of the electrode substrate and a second uncoated pattern portion located between coated pattern portions, wherein the coil section comprises a first coil section for heating the first uncoated pattern portion, and a second coil section for heating the second uncoated pattern portion, and wherein a heating temperature of the second coil section is lower than a heating temperature of the first coil section.

A lithium transition metal oxide electrode including an additional metal is provided herein as well electrochemical cells including the lithium transition metal oxide electrode and methods of making the lithium transition metal oxide electrode. The lithium transition metal oxide electrode includes a first electroactive material including Li.sub.1+aNi.sub.bMn.sub.cM.sub.dO.sub.2, where 0.05≤a≤0.6; 0.01≤b≤0.5; 0.1≤c≤0.9; zero (0)≤d≤0.3; b+c+d=1 or a+b+c+d=1; and M represents an additional metal, such as W, Mo, V, Zr, Nb, Ta, Fe, Al, Mg, Si, or a combination thereof.

A cathode structure for a battery includes a substrate having an electrically conductive surface and an electrode deposited onto the electrically conductive surface. The electrode is made of two or more electrode materials, including (i) one or more active materials, and (ii) specified weight percentage ranges of multi-walled carbon nanotubes (“MWCNTs”), or milled carbon fibers (“MCFs”), or a mixture of MWCNTs and MCFs. Using the specified weight percentage ranges, the electrode may be produced with a thickness of greater than 120 μm. Also disclosed are a slurry formulation for producing thick electrodes for a battery, and a method of fabricating a cathode structure for a battery.

A method for forming a treated sintered composition includes: providing a slurry precursor including a lithium-, sodium-, or magnesium-based compound; tape casting the slurry precursor to form a green tape; sintering the green tape at a temperature in a range of 500° C. to 1350° C. for a time in a range of less than 60 min to form a sintered composition; and heat treating the sintered composition at a temperature in a range of 700° C. to 1100° C. for a time in a range of 1 min to 2 hrs in an oxygen-containing atmosphere to form the treated sintered composition.