Sk Innovation Co., Ltd.

Sk on Co., Ltd.

Whee Sung Kim

Jae Woong Kim

Min Gu Kang

Cheol Woo Kim

Kwang Kuk Lee

Yong Hyun Cho

Jin Sung Kim

Young Hoon Do

Yun Kyung Jo

Jeong Han Kim

The present invention relates to a separator including a coating layer and a substrate, wherein phase-change peak temperatures measured by differential scanning calorimetry (DSC) at the time of a first temperature increase and at the time of a second temperature increase satisfy specific ranges, a method of producing the same, and an electrochemical device including the same. More particularly, the present invention relates to a separator that has improved thermal resistance and thus may improve battery safety and implement stable movement of lithium ions and a lithium secondary battery including the same.

Separators improved thermal resistance and secondary battery comprising same

A lithium secondary battery includes a plurality of electrode cells, each of which includes a first electrode, a second electrode having a different polarity from that of the first electrode and a separation layer interposed between the first electrode and the second electrode, and at least one ion permeation barrier between neighboring ones of the electrode cells. The ion permeation barrier has an air permeability less than that of the separation layer.

Lithium secondary battery

Provided are a lithium secondary battery electrolyte and a lithium secondary battery. The lithium secondary battery electrolyte includes a lithium salt, a non-aqueous organic solvent, and a boron derivative. The lithium secondary battery includes a cathode, an anode, a separator, and the secondary battery electrolyte. The secondary battery electrolyte according to the present invention has advantages of excellent stability at a high temperature, high discharge capacity at a low temperature, and excellent life cycle characteristics.

Lithium secondary battery electrolyte and lithium secondary battery comprising same

Growing community of inventors

Daejeon, South Korea

Whee Sung Kim