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<2021> LIB Separator Technology Trends and Market Outlook (~2030)

In order to configure a lithium secondary battery, a cathode and an anode capable of storing or supplying lithium ions, an electrolyte capable of providing or receiving lithium ions to both electrodes, and a porous separator that blocks physical contact between the cathode and the anode are used.

The role of the separator can be explained in two main ways. 1) Prevent an electrical short circuit between two electrodes and 2) Provide a path for ion transfer so that an electrochemical reaction may be continuously performed. In this respect, the performance of the battery and the physical factors of the separator have a very close correlation. The ion conductivity is affected by the thickness, porosity, size and distribution of the micro-pores, curvature and the Gurley Number.

In particular, the Normalized Gurley Number converted into the thickness of the separator has a strong correlation with Ionic Conductivity, and this factor value greatly affects the characteristics of each rate of the battery. Of course, an absolute value of battery performance may vary depending on the selection of an electrolyte or an electrode, but it is reported that Normalized Gurley Number or Ionic Conduction is important under the same conditions. Therefore, the selection of an appropriate separator has a very important effect on the overall battery characteristics including energy density, power density, life characteristics, and safety.

This report intensively deals with technical trends and market information on separators among the four major materials. In particular, to ensure the safety of secondary batteries, the industry intends to help the industry participants who purchases report by adding technology trends related to the development of heat-resistant separators.

Chapter Ⅰ. Status and Development Trends of Separator Technology

1. Introduction

2. Types of Separator

1.2.1 Micro Pore Membrane

1.2.2 Nonwoven Base film

Chapter Ⅱ. Polyolefin-Based Separator

1. Manufacturing Process of Polyolefin-Based Separator

2.1.1 Dry Process

2.1.2 Wet Process

2. Properties of Polyolefin-Based Separator

2.2.1 Thickness

2.2.2 Air Permeability

2.2.3 Porosity/Pore Size

2.2.4 Ionic Conductivity

2.2.5 MaxMullin Number

2.2.6 Electrical/Electrochemical Stability

2.2.7 Oxidation Stability

2.2.8 Wettability

2.2.9 Tensile Strength

2.2.10 Puncture Strength

2.2.11 Mix Penetration Strength

2.2.12 Thermal Shrinkage

2.2.13 Melt-down

2.2.14 Skew

2.2.15 Defects

2.2.16 Cell Assembly

3. Relationship between Polyolefin-Based Separator and Battery

2.3.1 Battery Performance

2.3.2 Battery Safety

Chapter Ⅲ. Non-Woven Separator

1. Non-Woven Separator Manufacturing Process

3.1.1 Dry-laid Method

3.1.2 Wet-laid Method

3.1.3 Spun-bond

3.1.4 Melt-blown Process

3.1.5 Web Bonding

2. Properties of Non-Woven Separator

Chapter Ⅳ. Latest Technology Trends for Heat-Resistant Separators

Chapter Ⅴ. Latest Technology Trends and Movements of Domestic LIB Separator Industry

Chapter Ⅵ. Trends and Outlook for LIB Separator Market

1. Demand Outlook by Country

2. Demand Outlook by Material

3. Market Status by Supplier

4. Demand Status by LIB Company

SDI/LGC/SKI/Panasonic/CATL/ATL/BYD/Lishen/Guoxuan/AESC

5. Outlook for Separator Production Capacity

6. Demand Outlook by Material

7. Trends of Separator Prices

Chapter Ⅶ. Status of Separator Manufacturers

1. Korean Separator Company

SKIET

2. Japanese Separator Company

Asahi Kasei/Toray/Ube/Sumitomo/W-scope

3. Chinese Separator Company

SEMCORP/Senior/Sinoma/CZMZ

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