Abstract: The present invention relates to a ceramic solid electrolyte, which is a key component of an all-solid-state lithium secondary battery, for improving safety, and a method for synthesizing the same. The present invention relates to an oxide-based conductive ceramic of a new NASICON structure of the chemical formula Li1+xAlxX2?xP3O12 (X is Zr, Si, Sn, or Y, 0<x<2) or Li1+xZr2XxP3?xO12 (X=Si, Sn, Ge, or Y, 1.5?x?2.3). The present invention relates to a method for manufacturing an oxide-based conductive ceramic having the above novel NASICON structure.
Abstract: The present invention relates to a composite electrolyte for a secondary battery, having a multi-layer structure, the composite electrolyte comprising: a first electrolyte layer positioned toward a cathode part; and a second electrolyte layer positioned toward an anode part, wherein each of the first electrolyte layer and the second electrolyte layer comprises a polymer base and ceramic particles, and the first electrolyte layer and the second electrolyte layer are formed of different materials.
Abstract: The present invention relates to a method for preparing a ceramic solid electrolyte having a even particle distribution, excellent crystallinity, and high ionic conductivity. Step 1 for preparing the ceramic solid electrolyte particles may be a step for adding and mixing raw materials to distilled water to prepare a solid electrolyte precursor. Step 2 may be a step for mixing the solid electrolyte precursor with a ball-mill. Step 3 may be a step for drying first by rotary concentrating or spraying. Step 4 may be a step for drying second in a dryer at 80° C. for at least 24 hours to completely remove the distilled water solvent. Step 5 may be a step for calcining first ceramic particles in a heat treatment device and firing second the ceramic particles.
Type:
Application
Filed:
March 27, 2019
Publication date:
May 27, 2021
Applicant:
SEVEN KING ENERGY CO., LTD.
Inventors:
Jung Woo SON, Ji Won SON, Jae Kwang KIM
Abstract: Provided is a hybrid solid electrolyte comprising: a hybrid film including (i) 60 to 100 parts by weight of an ion conductive ceramic and (ii) 1 to 40 parts by weight of a polymer; and a liquid electrolyte including (i) an ion compound selected from the group consisting of lithium ions and sodium ions and (ii) a solvent, wherein the hybrid film is impregnated with the liquid electrolyte.
Type:
Grant
Filed:
March 20, 2019
Date of Patent:
February 16, 2021
Assignee:
SEVEN KING ENERGY CO., LTD.
Inventors:
Jae-Kwang Kim, Ji-Won Son, Seoung Soo Lee, Young Jun Lim, Hyun Woo Kim, Yeon-Gil Jung, Youngsik Kim, Jing Lee
Abstract: In order to improve the safety of a rechargeable battery, methods for manufacturing the rechargeable battery using a solid-state electrolyte are being studied. However, a process of manufacturing the all-solid state rechargeable battery by separately preparing and laminating an electrode and a solid-state electrolyte is not only complicated, but also may cause side reactions due to residual moisture between the electrode and the solid-state electrolyte. In addition, additional processes are required to reduce the interface resistance between the electrode and the solid-state electrolyte. In order to solve these disadvantages, the present invention is to manufacture an integral all-solid state rechargeable battery by applying a mixed slurry of a conductive ceramic material and a polymer mixed with a solvent onto an electrode, evaporating the solvent, absorbing a liquid electrolyte, and then covering the electrode with a counter electrode.
Type:
Application
Filed:
September 27, 2018
Publication date:
August 27, 2020
Applicant:
SEVEN KING ENERGY CO., LTD.
Inventors:
Jung Woo Son, Ji Won Son, Hyun Ji Choi, Jae Kwang Kim
Abstract: A multi-layer structured composite electrolyte for a secondary battery and a secondary battery using the same are provided. The multi-layer structured composite electrolyte is made by laminating two or more layers of a composite electrolyte including a small amount of a liquid electrolyte in a mixture of a polymer and a ceramic material. The multi-layer structured composite electrolyte has the same stability as a solid electrolyte and has the same or better electrochemical properties as or than the liquid electrolyte. Since the multi-layer structured composite electrolyte of the present invention can be folded arbitrarily, the multi-layer structured composite electrolyte may be used in a wearable device.