Abstract: Provided are a cathode active material, a cathode comprising same, and a secondary battery. The cathode active material contains crystal water and a manganese-based metal oxide and has a first crystal phase having a two-dimensional crystal structure and a second crystal phase having a three-dimensional crystal structure, wherein the three-dimensional crystal structure is formed by the combination of manganese in the manganese-based metal oxide and oxygen in the crystal water.

Abstract: A method of preparing a lithium metal oxide having a nickel oxide layer formed on a surface thereof includes (1) complexing a nickel precursor onto a surface of a lithium metal oxide; and (2) calcining, through a heat treatment, the lithium metal oxide—the surface of which is complexed with the nickel precursor—obtained in step (1).

Abstract: The inventive concept discloses a cathode active material containing an organic molecule containing oxygen and a transition metal-based metal oxide.

Abstract: The inventive concept discloses a cathode active material containing crystal water and a manganese-based metal oxide.

Abstract: The inventive concept discloses a method for preparing a cathode active material containing a lithium manganese oxide exhibiting a reversible phase transition, and exhibiting electrochemical characteristics of the lithium manganese oxide through the reversible phase transition including (A) synthesizing a sodium manganese oxide using a manganese precursor, and (B) reacting the sodium manganese oxide with a lithium precursor to synthesize the lithium manganese oxide, or including (C) directly synthesizing the lithium manganese oxide.

Abstract: According to an embodiment, a porous electrode comprises a three-dimensional nanostructured porous catalyst film including a catalyst material promoting an oxygen reduction and evolution reactions, having an aligned pore structure, and having an upper surface and a lower surface opening the pore structure and a porous current collecting layer interfacially adhered to the three-dimensional nanostructured porous catalyst film by a binder polymer.

Abstract: Provided are a cathode active material, a cathode comprising same, and a secondary battery. The cathode active material contains crystal water and a manganese-based metal oxide and has a first crystal phase having a two-dimensional crystal structure and a second crystal phase having a three-dimensional crystal structure, wherein the three-dimensional crystal structure is formed by the combination of manganese in the manganese-based metal oxide and oxygen in the crystal water.

Abstract: A method of preparing a lithium metal oxide having a nickel oxide layer formed on a surface thereof includes (1) complexing a nickel precursor onto a surface of a lithium metal oxide; and (2) calcining, through a heat treatment, the lithium metal oxide—the surface of which is complexed with the nickel precursor—obtained in step (1).

Abstract: The present invention relates to a surface treatment method for lithium cobalt oxide, comprising the steps of: (S1) mixing lithium cobalt oxide and an organic phosphoric acid compound; and (S2) heat treating and calcining the mixture prepared in step (S1). The surface treatment method of the present invention is simpler and has higher reproducibility than a conventional surface coating and doping technique, and can improve electrochemical characteristics by reinforcing the structural stability of lithium cobalt oxide. In addition, LiCoO2 prepared by the surface treatment method of the present invention is structurally stable during charging/discharging and does not cause unnecessary phase transition, and thus has excellent lifetime characteristics.

Abstract: The present invention relates to a positive electrode active material for a lithium ion battery and, more specifically, to a positive electrode active material for a lithium ion battery, having improved initial capacitance and charging and discharging efficiency due to increased electrical conductivity or ion conductivity. The positive electrode active material for a lithium ion battery of the present invention contains lithium vanadium phosphate (Li3V2(PO4)3) and lithium zirconium phosphate (Li3Zr2(PO4)3) formed on an external surface of the lithium vanadium phosphate. The positive electrode active material for a lithium ion battery comprising lithium vanadium zirconium phosphate (Li3V2-xZrx(PO4)3) particles, which is prepared by a preparation method of the present invention, has excellent structural stability and ion conductivity as well as high capacitance.

Abstract: According to an embodiment of the present invention, a method for preparing a graphite-titanium oxide composite comprises (S1) a surface-modifying graphite with benzyl alcohol or a cellulose-based material using a sol-gel method, (S2) distributing the surface-modified graphite in a solvent, adding a titanium precursor to the solvent, and mixing the titanium precursor with the surface-modified graphite to obtain a graphite-titanium mixture, and (S3) thermally treating the graphite-titanium mixture to grow a titanium oxide on a surface of the graphite.

Abstract: A lithium secondary battery comprising a positive electrode, a negative electrode, a separation film, and an electrolyte, wherein the negative electrode includes a silicon-carbon composite as a negative active material, and wherein the electrolyte includes an additive selected from the group consisting of FEC, VEC, VC, EC, DFEC, t-butylbenzene, and t-pentylbenzene.

Abstract: The present invention relates to a surface treatment method for lithium cobalt oxide, comprising the steps of: (S1) mixing lithium cobalt oxide and an organic phosphoric acid compound; and (S2) heat treating and calcining the mixture prepared in step (S1). The surface treatment method of the present invention is simpler and has higher reproducibility than a conventional surface coating and doping technique, and can improve electrochemical characteristics by reinforcing the structural stability of lithium cobalt oxide. In addition, LiCoO2 prepared by the surface treatment method of the present invention is structurally stable during charging/discharging and does not cause unnecessary phase transition, and thus has excellent lifetime characteristics.

Abstract: The present invention relates to a lithium metal oxide having a nickel oxide layer formed on a surface thereof, and represented by Formula 1; and the lithium metal oxide can be prepared by a method of preparing a lithium metal oxide having a nickel oxide layer formed on a surface thereof, the method comprising steps of: (1) complexing a nickel precursor onto a surface of a lithium metal oxide; and (2) calcining, through a heat treatment, the lithium metal oxide—the surface of which is complexed with the nickel precursor—obtained in Step (1).

Abstract: According to an embodiment of the present disclosure, a multi-acid anionic material-carbon fiber composite comprises carbon nanofibers and multi-acid anionic crystals stuck in the carbon nanofibers. Some of the multi-acid anionic crystals are exposed to an outside of the carbon nanofibers.

Abstract: The present invention relates to a cathode catalyst for a lithium-air rechargeable battery, a manufacturing method thereof, and a lithium-air rechargeable battery including the same.

Abstract: According to an embodiment of the present invention, a method for preparing a graphite-titanium oxide composite comprises (S1) a surface-modifying graphite with benzyl alcohol or a cellulose-based material using a sol-gel method, (S2) distributing the surface-modified graphite in a solvent, adding a titanium precursor to the solvent, and mixing the titanium precursor with the surface-modified graphite to obtain a graphite-titanium mixture, and (S3) thermally treating the graphite-titanium mixture to grow a titanium oxide on a surface of the graphite.

Abstract: A method of preparing a silicon oxide (Six)-carbon composite for a negative-electrode active material of a lithium secondary battery, includes mixing silicon (Si) particles and a polymer material with an organic solvent, thus preparing a mixture solution, optionally electrospinning the mixture solution thus preparing a composite having a one-dimensional structure, and heat-treating the mixture solution or the composite having a one-dimensional structure. The silicon oxide (SiOx)-carbon composite can reduce volume expansion upon lithium ion insertion and can increase ionic conductivity and electronic conductivity and thus can maintain high capacity, making it possible to apply it to a lithium ion battery to thus improve electrochemical characteristics of the battery.

Abstract: The present invention relates to a positive electrode active material for a lithium ion battery and, more specifically, to a positive electrode active material for a lithium ion battery, having improved initial capacitance and charging and discharging efficiency due to increased electrical conductivity or ion conductivity. The positive electrode active material for a lithium ion battery of the present invention contains lithium vanadium phosphate (Li3V2(PO4)3) and lithium zirconium phosphate (Li3Zr2(PO4)3) formed on an external surface of the lithium vanadium phosphate. The positive electrode active material for a lithium ion battery comprising lithium vanadium zirconium phosphate (Li3V2-xZrx(PO4)3) particles, which is prepared by a preparation method of the present invention, has excellent structural stability and ion conductivity as well as high capacitance.

Abstract: A negative active material for rechargeable lithium batteries and a method of manufacturing the negative active material are provided. The negative active material for rechargeable lithium batteries includes at least one generally spherical assembly having flake-shaped materials that are capable of doping and dedoping lithium, and are arranged in a generally spherical shape defining a central pore. The negative active material imparts improved cycle-life characteristics.