Global Lithium-Ion Battery Wet Separator Market 2025 by Manufacturers, Regions, Type and Application, Forecast to 2031

According to our (Global Info Research) latest study, the global Lithium-Ion Battery Wet Separator market size was valued at US$ 3831 million in 2024 and is forecast to a readjusted size of USD 6198 million by 2031 with a CAGR of 6.8% during review period.

The wet process is also known as the thermally induced phase separation method. The wet process adopts the principle of thermally induced phase separation. The plasticizer is mixed with the polyolefin resin. Solid-liquid phase/liquid-liquid phase separation occurs during the cooling of the molten mixture. The membrane is pressed and heated to a temperature close to the melting point. It is then stretched to align the molecular chains. The film is kept warm and a volatile solvent is used to extract the plasticizer from the film to produce a diaphragm. Separator usually refers to a porous membrane material located between the positive and negative electrodes of a battery. Its main function is to prevent the positive and negative electrodes from directly contacting each other and causing a short circuit, while allowing electrolyte ions to pass through to maintain the battery's charge and discharge process.

The driving factors of the lithium-ion battery wet-process diaphragm market are as follows:

The market demand continues to expand:

New energy vehicle market: Global new energy vehicle sales are expected to continue to grow, directly driving the demand for wet-process diaphragms. For example, global new energy vehicle sales reached 18.236 million units in 2024 and are expected to reach 44.050 million units in 2030. As the world's largest market, China's new energy vehicle penetration rate has reached 47.6% in 2024 and is expected to exceed 50% in 2025.

Energy storage market: With the popularization of renewable energy and the construction of smart grids, the demand for high-safety and long-life batteries in energy storage systems has surged. Due to its higher chemical stability and high temperature resistance, the proportion of wet-process diaphragms in the energy storage field has gradually expanded.

Technology iteration direction:

Coating technology promotes performance upgrades: Through the composite coating of ceramics, PVDF and other materials, the heat resistance and electrolyte wettability of the diaphragm are significantly improved, which can be adapted to ternary batteries and lithium iron phosphate batteries with higher energy density.

Accelerated R&D of solid-state batteries: Higher requirements are placed on diaphragms. Some companies have deployed electrolyte coating technology to combine diaphragms with solid electrolytes to improve the stability of the battery interface.

Automated and intelligent production: The introduction of automated production lines and intelligent detection systems has significantly improved the production efficiency and yield rate of wet-process diaphragms.

Cost competition and scale effect:

Scale effect dilutes costs: The initial investment in wet-process diaphragm production is high, but large-scale production can significantly reduce unit costs. For example, by increasing the width and speed of the production line, the single-line production capacity can reach hundreds of millions of square meters per year, further compressing depreciation and energy costs.

Process optimization reduces costs: Leading companies have achieved a cost reduction of more than 20% through process optimization, accelerating industry integration.

Policies and global layout:

Policy support: The EU's strict carbon emission standards force automakers to accelerate the transformation to electrification, indirectly pushing up the demand for wet-process diaphragms. The Chinese government has also introduced a series of supporting policies to promote the continued expansion of the new energy vehicle market, thereby driving the rapid development of the wet-process diaphragm industry.

Global layout: Chinese wet-process diaphragm companies are accelerating the expansion of overseas markets with their technological accumulation and cost advantages. Cooperation with international battery manufacturers such as Japan and South Korea, as well as the construction of localized production lines in Southeast Asia and Europe, will further increase global market share.

Environmental protection requirements promote green production:

Environmental protection policies are becoming stricter: companies are encouraged to adopt green production processes, such as reducing solvent emissions and optimizing energy recovery to meet the carbon footprint requirements of markets such as the European Union.

This information comprehensively covers the driving factors of the lithium-ion battery wet-process diaphragm market, reflecting how multiple factors such as market demand, technological progress, policy support, cost competition and environmental protection requirements jointly promote the development of the wet-process diaphragm market.

This report is a detailed and comprehensive analysis for global Lithium-Ion Battery Wet Separator market. Both quantitative and qualitative analyses are presented by manufacturers, by region & country, by Type and by Application. As the market is constantly changing, this report explores the competition, supply and demand trends, as well as key factors that contribute to its changing demands across many markets. Company profiles and product examples of selected competitors, along with market share estimates of some of the selected leaders for the year 2025, are provided.

Key Features:

Global Lithium-Ion Battery Wet Separator market size and forecasts, in consumption value ($ Million), sales quantity (Sqm), and average selling prices (US$/Sq m), 2020-2031

Global Lithium-Ion Battery Wet Separator market size and forecasts by region and country, in consumption value ($ Million), sales quantity (Sqm), and average selling prices (US$/Sq m), 2020-2031

Global Lithium-Ion Battery Wet Separator market size and forecasts, by Type and by Application, in consumption value ($ Million), sales quantity (Sqm), and average selling prices (US$/Sq m), 2020-2031

Global Lithium-Ion Battery Wet Separator market shares of main players, shipments in revenue ($ Million), sales quantity (Sqm), and ASP (US$/Sq m), 2020-2025

The Primary Objectives in This Report Are:

To determine the size of the total market opportunity of global and key countries

To assess the growth potential for Lithium-Ion Battery Wet Separator

To forecast future growth in each product and end-use market

To assess competitive factors affecting the marketplace

This report profiles key players in the global Lithium-Ion Battery Wet Separator market based on the following parameters - company overview, sales quantity, revenue, price, gross margin, product portfolio, geographical presence, and key developments. Key companies covered as a part of this study include Semcorp, Putailai, Senior, Gellec, TORAY, Asahi Kasei, Sinoma Science & Technology, SK IE Technology, Cangzhou Mingzhu, ENTEK, etc.

This report also provides key insights about market drivers, restraints, opportunities, new product launches or approvals.

Market Segmentation

Lithium-Ion Battery Wet Separator market is split by Type and by Application. For the period 2020-2031, the growth among segments provides accurate calculations and forecasts for consumption value by Type, and by Application in terms of volume and value. This analysis can help you expand your business by targeting qualified niche markets.

Market segment by Type
Coated Separator
Uncoated Separator

Market segment by Application
Power Battery
Consumer Battery
Energy Storage Battery

Major players covered
Semcorp
Putailai
Senior
Gellec
TORAY
Asahi Kasei
Sinoma Science & Technology
SK IE Technology
Cangzhou Mingzhu
ENTEK

Market segment by region, regional analysis covers

North America (United States, Canada, and Mexico)

Europe (Germany, France, United Kingdom, Russia, Italy, and Rest of Europe)

Asia-Pacific (China, Japan, Korea, India, Southeast Asia, and Australia)

South America (Brazil, Argentina, Colombia, and Rest of South America)

Middle East & Africa (Saudi Arabia, UAE, Egypt, South Africa, and Rest of Middle East & Africa)

The content of the study subjects, includes a total of 15 chapters:

Chapter 1, to describe Lithium-Ion Battery Wet Separator product scope, market overview, market estimation caveats and base year.

Chapter 2, to profile the top manufacturers of Lithium-Ion Battery Wet Separator, with price, sales quantity, revenue, and global market share of Lithium-Ion Battery Wet Separator from 2020 to 2025.

Chapter 3, the Lithium-Ion Battery Wet Separator competitive situation, sales quantity, revenue, and global market share of top manufacturers are analyzed emphatically by landscape contrast.

Chapter 4, the Lithium-Ion Battery Wet Separator breakdown data are shown at the regional level, to show the sales quantity, consumption value, and growth by regions, from 2020 to 2031.

Chapter 5 and 6, to segment the sales by Type and by Application, with sales market share and growth rate by Type, by Application, from 2020 to 2031.

Chapter 7, 8, 9, 10 and 11, to break the sales data at the country level, with sales quantity, consumption value, and market share for key countries in the world, from 2020 to 2025.and Lithium-Ion Battery Wet Separator market forecast, by regions, by Type, and by Application, with sales and revenue, from 2026 to 2031.

Chapter 12, market dynamics, drivers, restraints, trends, and Porters Five Forces analysis.

Chapter 13, the key raw materials and key suppliers, and industry chain of Lithium-Ion Battery Wet Separator.

Chapter 14 and 15, to describe Lithium-Ion Battery Wet Separator sales channel, distributors, customers, research findings and conclusion.