Abstract: Disclosed is an electrode whose surface includes an organic/inorganic composite porous coating layer comprising heat-absorbing inorganic particles and a binder polymer, wherein the heat-absorbing inorganic particle is at least one particle selected from the group consisting of antimony-containing compounds, metal hydroxides, guanidine-based compounds, born-containing compounds and zinc tartrate compounds. A separator using the heat-absorbing inorganic particles as a component for forming or coating the separator, and an electrochemical device including the electrode and/or the separator are also disclosed. The separator using the heat-absorbing inorganic particles as a component for forming or coating the separator can ensure excellent thermal safety and minimizes degradation of the quality of a battery.

Abstract: Disclosed is an electrode whose surface includes an organic/inorganic composite porous coating layer comprising heat-absorbing inorganic particles and a binder polymer, wherein the heat-absorbing inorganic particle is at least one particle selected from the group consisting of antimony-containing compounds, metal hydroxides, guanidine-based compounds, born-containing compounds and zinc tartrate compounds. A separator using the heat-absorbing inorganic particles as a component for forming or coating the separator, and an electrochemical device including the electrode and/or the separator are also disclosed. The separator using the heat-absorbing inorganic particles as a component for forming or coating the separator can ensure excellent thermal safety and minimizes degradation of the quality of a battery.

Abstract: Disclosed herein is a battery cell configured to have a structure in which an electrode stack, which is configured to have a structure in which positive electrodes and negative electrodes are stacked in the height direction on the basis of the ground in the state in which separators are disposed respectively between the positive electrodes and the negative electrodes, is mounted in a battery case in a sealed state, the battery case is formed in a pipe shape having a hollow part, and the electrode stack is formed in a shape corresponding to the shape of the battery case.

Abstract: Disclosed are a cross-linked compound particle and a secondary battery including the same. More particularly, a compound particle which includes a monomer and a polymerization initiator, as a core and a film including a material disappeared at predetermined temperature as a shell is provided.

Abstract: Disclosed is a positive electrode mix for secondary batteries including an irreversible additive. More particularly, provided is a positive electrode mix for secondary batteries including an irreversible additive that decreases irreversible efficiency of a positive electrode active material and a positive electrode.

Abstract: The present invention relates to a hollow packaging for a cable-type secondary battery and a cable-type secondary battery comprising same, and more specifically, to a hollow packaging for a cable-type secondary battery and a cable-type secondary battery comprising same, wherein the hollow packaging for a cable-type secondary battery comprises a packaging sheet including a sheet-type thin metal layer provided with a corrugated pattern on the surface, a first polymer resin layer formed on one surface of the thin metal layer, and a mechanical support layer formed on the other surface of the thin metal layer, wherein the packaging sheet forms a hollow space by bending so that the first polymer resin layer faces inward.

Abstract: Disclosed herein is a battery including a cell having an electrode laminate and a liquid electrolyte mounted in an internal space of a battery case, a gas discharging member communicating with the internal space of the battery case for discharging gas generated in the cell out of the cell, and a liquid electrolyte injection member communicating with the internal space of the battery case for injecting a liquid electrolyte into internal space of the battery case.

Abstract: The present invention relates to a battery system capable of mitigating the performance deterioration of a secondary battery cell and extending a period of use by additionally injecting a second electrolyte at a point in time when the capacity of the secondary battery cell has decreased, and a method for operating a battery system which can achieve the same.

Abstract: The present invention relates to a multilayer electrolyte cell, a secondary battery including the multilayer electrolyte cell, and a manufacturing method thereof, and more particularly, to a multilayer electrolyte cell, in which electrolytes are configured in multiple layers by stacking polymer coating layers containing ceramic solid electrolytes and liquid electrolytes including an ionic liquid in a porous structure base, a secondary battery including the multilayer electrolyte cell, and a manufacturing method thereof.

Abstract: Provided is a secondary battery that is capable of reducing resistance. The secondary battery includes an electrode assembly in which a positive electrode and a negative electrode are alternately laminated with a separator therebetween, a first bus bar laminated on the outside of the positive electrode disposed on the outermost portion of one side of the electrode assembly with a separator therebetween, a second bus bar laminated on the outside of the negative electrode disposed on the outermost portion of the other side of the electrode assembly with a separator therebetween, and a case accommodating the electrode assembly, the first bus bar, and the second bus bar.

Abstract: Disclosed herein are an electrode configured such that electrode mixture parts, each of which includes an electrode active material, and irreversible parts, each of which includes an irreversible additive, are alternately coated on one surface or both surfaces of a current collector to form an electrode pattern and a secondary battery including the same.

Abstract: The present disclosure provides a porous separator substrate with an inverse opal structure obtained by using an engineering plastic resin with high heat-resistance, and a manufacturing method thereof. In the method, a non-crosslinked polymer resin is used to form an opal structure and a crosslinked polymer resin is penetrated into the opal structure and an organic solvent is used to remove the polymer particles being used to form the opal structure, thereby manufacturing a porous substrate with an inverse opal structure. According to the present disclosure, a separator having good porosity and air permeability can be provided without the problems of heat-resistance decrease, pore closing and thickness decrease.

Abstract: Provided are an electrode for a secondary battery and a manufacturing method thereof. According to the present invention, a secondary battery, which has high capacity and is also able to get an excellent evaluation in a nail penetration test so that stability is ensured, may be manufactured. In order to accomplish the above objectives, the present invention provides an electrode for a secondary battery which includes an electrode current collector; a first electrode active material layer formed on the electrode current collector; and a second electrode active material layer formed on the first electrode active material layer, wherein a layer composed of the electrode current collector and the first electrode active material layer has a tensile strain of 1.2% or less.

Abstract: The present invention provides a battery cell including: an electrode assembly including an electrode tab protruding toward at least one external side; a battery case including a receiving portion on which the electrode assembly is received; and an electrode lead connected to the electrode tab to be connected to an external device, wherein the electrode lead may include: a tab connecting portion electrically connected to the electrode tab; and a protruding extension protruding outside of the battery case in a state of extending from the tab connecting portion to be electrically connected to the external device, and the tab connecting portion may be formed so that a length of a width direction perpendicular to a protruding direction of the electrode tab may be relatively larger than that of the electrode tab.

Abstract: The present invention provides a curing die for manufacturing a gel polymer electrolyte, and a method for manufacturing a gel polymer battery cell by using the same, the curing die comprising: a first die having a recessed part, which is formed inside a battery case and has a processing battery cell mounted therein and including an electrode assembly and a composition for forming the gel polymer electrolyte; and a second die coupled to the first die so as to seal the processing battery cell mounted in the recessed part.

Abstract: Disclosed herein is a battery cell including: an electrode assembly including an electrode tab protruding toward at least one outer periphery; a battery case including an accommodation part in which the electrode assembly is mounted; and an electrode lead connected to the electrode tab for electrical connection with an external device, wherein the electrode lead includes: a tab connection part electrically connected to the electrode tab; and a protrusion extension part extended from the tab connection part and protruding outwardly of the battery case to thereby be electrically connected to the external device, the tab connection part being coated with a gas adsorbent.

Abstract: Disclosed is an electrode for secondary batteries including an electrode mix, which includes an electrode active material and a binder, coated on a current collector. More particularly, the electrode includes a first electrode mix layer including a first binder, a glass transition temperature (Tg) of which is lower than that of a second binder, and an electrode active material, and coated on the current collector; and a second electrode mix layer including the second binder, a glass transition temperature (Tg) of which is higher than that of the first binder, and an electrode active material, and coated on the first electrode mix layer.

Abstract: The present invention provides a method of manufacturing a battery cell, including: (i) manufacturing a reference cell composed of an electrolyte solution, n reference electrodes (n?2) and a lithium electrode; (ii) charging the reference cell by applying a microcurrent, and then discharging the reference cell immediately thereafter; (iii) charging the reference cell to 40% to 60% of a capacity discharged in the process (ii), thereby performing formation on the reference electrodes so that the reference electrodes have a plateau potential simultaneously; (iv) manufacturing n battery cells with the reference electrodes subjected to formation, an electrode assembly, the electrolyte solution and a battery case; and (v) measuring a relative potential of the reference electrode subjected to formation and a positive electrode, and a relative potential of the reference electrode and a negative electrode, in each of the battery cells.

Abstract: Disclosed is an organic/inorganic composite porous film comprising: (a) inorganic particles; and (b) a binder polymer coating layer formed partially or totally on surfaces of the inorganic particles, wherein the inorganic particles are interconnected among themselves and are fixed by the binder polymer, and interstitial volumes among the inorganic particles form a micropore structure. A method for manufacturing the same film and an electrochemical device including the same film are also disclosed. An electrochemical device comprising the organic/inorganic composite porous film shows improved safety and quality.

Abstract: The present disclosure refers to a secondary battery which comprises a high-voltage cathode active material and a separator whose pores are not obstructed even though being used together with the high-voltage cathode active material, thereby preventing the obstruction of pores in the separator and the formation of a dendrite in the anode and eventually providing good battery life performance.