Lg Chem, Ltd

Ulsan National Institute of Science and Technology

Lg Energy Solution, Ltd.

Unist-academy Industry Research Corporation

Dong Sub Jung

Eun Kyung Kim

Sang Wook Woo

Je Young Kim

Yong Ju Lee

Hee Won Choi

Ju Ho Chung

Jae Phil Cho

Hye Ran Jung

Jung In Lee

Soo Jin Park

Oh Byong Chae

Su Min Lee

Sun Young Shin

Dong Hyuk Kim

Ki Tae Kim

Yoon Ah Kang

Ye Ri Kim

Seung Tae Hong

Jun Hyuk Song

Young Sun Choi

Mi Rim Lee

InSung Uhm

Yongju Lee

Chang Ju Lee

Jeyoung Kim

Seungyoun Choi

Suk In Noh

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.

Negative electrode for lithium secondary battery, lithium secondary battery comprising the same, and preparation method thereof

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.

Negative electrode active material, and negative electrode and lithium secondary battery which include the same

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 m/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.

Negative electrode active material for lithium secondary battery, negative electrode and lithium secondary battery comprising the same

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.

Anode active material and lithium secondary battery including the same

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 &#x3bc;m to 20 &#x3bc;m and (B) second artificial graphite having an average particle diameter (D50) of 3 &#x3bc;m to 5 &#x3bc;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.

Negative electrode active material for lithium secondary battery and negative electrode for lithium secondary battery including the same

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.

Secondary graphite particle and secondary lithium battery comprising the same

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 SiO(0.5&#x2266;x&#x2266;1.2) and having a Brunauer, Emmett, and Teller (BET) specific surface area ranging from 2 m/g to 100 m/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 SiO(0.5&#x2266;x&#x2266;1.2) and having a BET specific surface area ranging from 2 m/g to 100 m/g.

Porous electrode active material and secondary battery including the same

Disclosed herein is a porous silicon-based electrode active material, comprising a silicon phase, a SiO(0&#x3c;x&#x3c;2) phase and a silicon dioxide phase and having a porosity of 7-71%.

Porous silicon-based electrode active material and secondary battery comprising the same

Disclosed is an anode active material including: a crystalline phase comprising Si and a Si-metal alloy; and an amorphous phase comprising Si and a Si-metal alloy, wherein the metal of the Si-metal alloy of the crystalline phase is the same as or different from the metal of the Si-metal alloy of the amorphous phase.

Anode active material for secondary battery

Disclosed are a composite which can be used as an electrode active material for a secondary battery, and the secondary battery comprising the same. The composite includes: a first material selected from the group consisting of metals and metalloids capable of being reversibly alloyed with lithium; a second material selected from the group consisting of metals incapable of being alloyed with lithium, compounds containing the metals, and compounds containing metals or metalloids capable of being irreversibly alloyed with lithium; and a third material which is at least one kind of metal having a higher electrical conductivity than the second material, wherein a content of the third material ranges from 10 to 10,000 ppm based on the total weight of the composite.

Composite for electrode active material and secondary battery comprising the same

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Daejeon, South Korea

Dong Sub Jung