Lg Chem, Ltd

Lg Energy Solution, Ltd.

Hyun Woong Yun

Byung Hun Oh

Je Young Kim

Ye Ri Kim

Eun Kyung Kim

Hoe Jin Hah

Tae Gon Kim

Jin H Cho

Yong Jun Kim

Soon Hyung Choi

Jin Hyun Cho

The present invention relates to a negative electrode for a secondary battery. The negative electrode for the secondary battery according to an embodiment of the present invention comprises a negative electrode collector and a negative electrode active material integrated with at least a portion of a surface of the negative electrode collector, wherein the negative electrode collector has a plurality of delamination prevention current collection grooves with which the negative electrode active material is integrated, and the negative electrode active material is disposed on an inner surface of each of the delamination prevention current collection grooves so that a space part in which a passivation layer is formed is defined during charging and discharging.

Negative electrode for secondary battery

Provided is a positive electrode material slurry for secondary battery including a positive electrode active material, a conductive agent, a binder, and a solvent, wherein the conductive agent includes a first conductive agent and a second conductive agent having different particle shapes and sizes. Since the conductive agent of the present invention may be uniformly dispersed in the positive electrode active material by including a point-type conductive agent, as the first conductive agent, and carbon nanotubes (CNTs) subjected to a grinding process as the linear second conductive agent, conductivity of an electrode to be prepared may be improved and a secondary battery having improved high-rate discharge capacity characteristics may be provided.

Positive electrode material slurry for lithium secondary battery including at least two conductive materials and lithium secondary battery using the same

Provided is an anode active material including lithium metal oxide particles having an internal porosity ranging from 3% to 8% and an average particle diameter (D) ranging from 5 &#x3bc;m to 12 &#x3bc;m. According to the present invention, since the high-density lithium metal oxide particles are included, the adhesion to an anode may be significantly improved even by using the same or smaller amount of a binder that is required during the preparation of an anode slurry, and high rate characteristics of a secondary battery may be improved by decreasing the average particle diameter of the lithium metal oxide particles.

Anode active material having high density and preparation method thereof

Provided is an anode active material including a compound of Chemical Formula 1 below that may realize a high-density electrode and may simultaneously improve adhesion to the electrode and high rate capability, wherein the compound of Chemical Formula 1 includes first primary particles and secondary particles, and a ratio of the first primary particles to the secondary particles is in a range of 5:95 to 50:50:LiMO&#x2003;&#x2003;[Chemical Formula 1] where M is any one independently selected from the group consisting of titanium (Ti), tin (Sn), copper (Cu), lead (Pb), antimony (Sb), zinc (Zn), iron (Fe), indium (In), aluminum (Al), and zirconium (Zr) or a mixture of two or more thereof; and x, y, and z are determined according to an oxidation number of M.

Bimodal type anode active material and lithium secondary battery including the same

Growing community of inventors

Daejeon, South Korea

Hyun Woong Yun