Abstract: A negative electrode for a lithium secondary battery, in which a LiF layer comprising amorphous LiF in an amount of 30 mol % or more is formed on a negative electrode active material layer comprising a carbon-based active material, a lithium secondary battery comprising the same, and a preparation method thereof.

Abstract: A negative electrode active material, including: a graphite core; a first carbon coating layer on the graphite core; and a second carbon coating layer on the first carbon coating layer, wherein a crystallinity of the second carbon coating layer is lower than a crystallinity of the first carbon coating layer, or the second carbon coating layer includes hard carbon and the first carbon coating layer includes soft carbon. A negative electrode including the negative electrode active material and a lithium secondary battery including the same are also disclosed.

Abstract: A negative electrode and a secondary battery including the negative electrode, the negative electrode includes a negative electrode active material layer, the negative electrode active material layer includes a negative electrode active material, the negative electrode active material includes a carbon-based negative electrode active material particles. Each carbon-based negative electrode active material particle includes a core comprising a plurality of flake artificial graphite primary particles; natural graphite present on the core; and an amorphous carbon-based material, wherein the natural graphite is present in the carbon-based negative electrode active material particles in an amount of 10 wt % to 30 wt %, and the carbon-based negative electrode active material particles have a sphericity of 0.78 to 0.83.

Abstract: A method for preparing a spheronized carbonaceous negative electrode active material, including the steps of: mixing microgranular scaly graphite with macrogranular scaly graphite, wherein the macrogranular scaly graphite has a larger average particle diameter than the microgranular scaly graphite, to form a mixture, and spheronizing the mixture to prepare spheronized granulated particles; carrying out carbon coating of the spheronized granulated particles; and disintegrating the carbon-coated spheronized granulated particles.

Abstract: A method for preparing a negative electrode active material. The method includes disposing a pitch on graphite particles and performing a first heat treatment on the graphite particles to form a first carbon coating layer, and disposing a liquid resin on the first carbon coating layer and performing a second heat treatment on the graphite particles to form a second carbon coating layer.

Abstract: A negative electrode active material which may dramatically improve stability of a battery while not degrading battery performance such as cycle characteristics, and a negative electrode and a lithium secondary battery which include the same, wherein the negative electrode active material includes negative electrode active material particles which include artificial graphite in the form of a secondary particle and a carbon layer formed on the surface of the artificial graphite, and a coating layer which is formed on the negative electrode active material particle and includes a compound represented by Formula 1.

Abstract: A negative electrode active material for a lithium secondary battery, which includes: natural graphite particles; and soft carbon particles having a BET specific surface area of 7.6 m2/g or more, wherein the natural graphite particles and the soft carbon particles are present in the negative electrode active material at a range of weight ratio of 78:22 to 92:8. Also a negative electrode containing the negative electrode active material and a lithium secondary battery containing the negative electrode.

Abstract: The present invention relates to an anode active material including natural graphite and mosaic coke-based artificial graphite, and a lithium secondary battery including the same. According to an embodiment of the present invention, an anode active material including natural graphite and mosaic coke-based artificial graphite is used, when applied to a lithium secondary battery, intercalation and deintercalation of lithium ions is more facilitated and conductivity of an electrode is improved even if no or little conductive material is used. Furthermore, the increase in conductivity can lead to not only a further improvement in rate performance of a lithium secondary battery but also a reduction in interfacial resistance.

Abstract: A negative electrode for a lithium secondary battery, in which a LiF layer comprising amorphous LiF in an amount of 30 mol % or more is formed on a negative electrode active material layer comprising a carbon-based active material, a lithium secondary battery comprising the same, and a preparation method thereof.

Abstract: A negative electrode active material for a lithium secondary battery, which includes: natural graphite particles; and soft carbon particles having a BET specific surface area of 7.6 m2/g or more, wherein the natural graphite particles and the soft carbon particles are present in the negative electrode active material at a range of weight ratio of 78:22 to 92:8. Also a negative electrode containing the negative electrode active material and a lithium secondary battery containing the negative electrode.

Abstract: The present invention relates to a negative electrode active material for a lithium secondary battery, which includes (A) first artificial graphite having an average particle diameter (D50) of 15 ?m to 20 ?m and (B) second artificial graphite having an average particle diameter (D50) of 3 ?m to 5 ?m, wherein the first artificial graphite (A) includes a secondary artificial graphite particle, in which at least one primary artificial graphite particle is agglomerated, and a carbon coating layer, and a weight ratio of the first artificial graphite to the second artificial graphite is in a range of 85:15 to 95:5, a negative electrode including the same, and a lithium secondary battery including the negative electrode.

Abstract: A negative electrode active material which may dramatically improve stability of a battery while not degrading battery perfonhance such as cycle characteristics, and a negative electrode and a lithium secondary battery which include the same, wherein the negative electrode active material includes negative electrode active material particles which include artificial graphite in the form of a secondary particle and a carbon layer formed on the surface of the artificial graphite, and a coating layer which is formed on the negative electrode active material particle and includes a compound represented by Formula 1.

Abstract: The present disclosure relates to a secondary graphite particle comprising an initial natural graphite particle of excellent high capacity and output characteristic, aggregated, bonded or assembled with an initial artificial graphite particle of excellent cycle characteristic and swelling characteristic, thus having superior rollability that leads into increased density, a negative electrode using the secondary graphite particle as a negative electrode active material, and a secondary lithium battery comprising the negative electrode. Accordingly, the secondary lithium battery comprising the secondary graphite particle as described above as the negative electrode active material has an effect of enhanced high rate charging and discharging capability, cycle characteristic and swelling characteristic.

Abstract: The present invention relates to an anode active material including natural graphite and mosaic coke-based artificial graphite, and a lithium secondary battery including the same. According to an embodiment of the present invention, an anode active material including natural graphite and mosaic coke-based artificial graphite is used, when applied to a lithium secondary battery, intercalation and deintercalation of lithium ions is more facilitated and conductivity of an electrode is improved even if no or little conductive material is used. Furthermore, the increase in conductivity can lead to not only a further improvement in rate performance of a lithium secondary battery but also a reduction in interfacial resistance.

Abstract: The present invention relates to an anode active material including natural graphite and mosaic coke-based artificial graphite, and a lithium secondary battery including the same. According to an embodiment of the present invention, an anode active material including natural graphite and mosaic coke-based artificial graphite is used, when applied to a lithium secondary battery, intercalation and deintercalation of lithium ions is more facilitated and conductivity of an electrode is improved even if no or little conductive material is used. Furthermore, the increase in conductivity can lead to not only a further improvement in rate performance of a lithium secondary battery but also a reduction in interfacial resistance.

Abstract: The present invention relates to a negative electrode active material for a lithium secondary battery, which includes (A) first artificial graphite having an average particle diameter (D50) of 15 ?m to 20 ?m and (B) second artificial graphite having an average particle diameter (D50) of 3 ?m to 5 ?m, wherein the first artificial graphite (A) includes a secondary artificial graphite particle, in which at least one primary artificial graphite particle is agglomerated, and a carbon coating layer, and a weight ratio of the first artificial graphite to the second artificial graphite is in a range of 85:15 to 95:5, a negative electrode including the same, and a lithium secondary battery including the negative electrode.

Abstract: Provided are an electrode active material having a plurality of pores and a secondary battery including the same, and more particularly, a porous electrode active material including silicon-based oxide expressed by SiOx (0.5?x?1.2) and having a Brunauer, Emmett, and Teller (BET) specific surface area ranging from 2 m2/g to 100 m2/g, and a secondary battery including a cathode including a cathode active material, a separator, an anode including an anode active material, and an electrolyte, in which the anode active material includes a porous electrode active material including silicon-based oxide expressed by SiOx (0.5?x?1.2) and having a BET specific surface area ranging from 2 m2/g to 100 m2/g.

Abstract: The present invention relates to a cable-type secondary battery comprising a polymer electrolyte having a first electrolyte layer comprising a mixture of a first polymer and a first organic electrolyte solution in a weight ratio of 50:50 and 80:20; and a second electrolyte layer formed on at least one surface of the first electrolyte layer and comprising a mixture of a second polymer and a second organic electrolyte solution in a weight ratio of 20:80 and 50:50. Since the multiple-layered polymer electrode film of the present invention exhibits good characteristics in terms of both mechanical property and ionic conductivity, the cable-type secondary battery comprising the same according to the present invention has superior battery performances and flexibility, as well as good strength for withstanding external impact.

Abstract: Provided are an electrode active material having a plurality of pores and a secondary battery including the same, and more particularly, a porous electrode active material including silicon-based oxide expressed by SiOx (0.5?x?1.2) and having a Brunauer, Emmett, and Teller (BET) specific surface area ranging from 2 m2/g to 100 m2/g, and a secondary battery including a cathode including a cathode active material, a separator, an anode including an anode active material, and an electrolyte, in which the anode active material includes a porous electrode active material including silicon-based oxide expressed by SiOx (0.5?x?1.2) and having a BET specific surface area ranging from 2 m2/g to 100 m2/g.

Abstract: Provided are an electrode active material having a plurality of pores and a secondary battery including the same, and more particularly, a porous electrode active material including silicon-based oxide expressed by SiOx (0.5?x?1.2) and having a Brunauer, Emmett, and Teller (BET) specific surface area ranging from 2 m2/g to 100 m2/g, and a secondary battery including a cathode including a cathode active material, a separator, an anode including an anode active material, and an electrolyte, in which the anode active material includes a porous electrode active material including silicon-based oxide expressed by SiOx (0.5?x?1.2) and having a BET specific surface area ranging from 2 m2/g to 100 m2/g.