Global Lithium Battery Wet Separator Market Growth 2025-2031

The global Lithium Battery Wet Separator market size is predicted to grow from US$ 3963 million in 2025 to US$ 6035 million in 2031; it is expected to grow at a CAGR of 7.3% from 2025 to 2031.

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.

LP Information, Inc. (LPI) ' newest research report, the “Lithium Battery Wet Separator Industry Forecast” looks at past sales and reviews total world Lithium Battery Wet Separator sales in 2024, providing a comprehensive analysis by region and market sector of projected Lithium Battery Wet Separator sales for 2025 through 2031. With Lithium Battery Wet Separator sales broken down by region, market sector and sub-sector, this report provides a detailed analysis in US$ millions of the world Lithium Battery Wet Separator industry.

This Insight Report provides a comprehensive analysis of the global Lithium Battery Wet Separator landscape and highlights key trends related to product segmentation, company formation, revenue, and market share, latest development, and M&A activity. This report also analyzes the strategies of leading global companies with a focus on Lithium Battery Wet Separator portfolios and capabilities, market entry strategies, market positions, and geographic footprints, to better understand these firms’ unique position in an accelerating global Lithium Battery Wet Separator market.

This Insight Report evaluates the key market trends, drivers, and affecting factors shaping the global outlook for Lithium Battery Wet Separator and breaks down the forecast by Type, by Application, geography, and market size to highlight emerging pockets of opportunity. With a transparent methodology based on hundreds of bottom-up qualitative and quantitative market inputs, this study forecast offers a highly nuanced view of the current state and future trajectory in the global Lithium Battery Wet Separator.

This report presents a comprehensive overview, market shares, and growth opportunities of Lithium Battery Wet Separator market by product type, application, key manufacturers and key regions and countries.

Segmentation by Type:
Coated Separator
Uncoated Separator

Segmentation by Application:
Power Battery
Consumer Battery
Energy Storage Battery

This report also splits the market by region:
Americas
United States
Canada
Mexico
Brazil
APAC
China
Japan
Korea
Southeast Asia
India
Australia
Europe
Germany
France
UK
Italy
Russia
Middle East & Africa
Egypt
South Africa
Israel
Turkey
GCC Countries

The below companies that are profiled have been selected based on inputs gathered from primary experts and analysing the company's coverage, product portfolio, its market penetration.
Semcorp
Putailai
Senior
Gellec
TORAY
Asahi Kasei
Sinoma Science & Technology
SK IE Technology
Cangzhou Mingzhu
ENTEK

Key Questions Addressed in this Report

What is the 10-year outlook for the global Lithium Battery Wet Separator market?

What factors are driving Lithium Battery Wet Separator market growth, globally and by region?

Which technologies are poised for the fastest growth by market and region?

How do Lithium Battery Wet Separator market opportunities vary by end market size?

How does Lithium Battery Wet Separator break out by Type, by Application?

Please note: The report will take approximately 2 business days to prepare and deliver.