Lithium-Ion Battery Copper Foil Shipments Surge as Ultra-Thin Products Gain Share

Copper Foil

Lithium-ion battery copper foil shipments rose sharply in 2025 as global battery production expanded and manufacturers shifted toward thinner materials to reduce copper costs. Global shipments reached 1.302mn t, up 41.7% from 2024, according to Chinese research institute EV Tank.

Lithium-ion battery copper foil demand remains closely tied to electric vehicle and energy storage growth. Copper foil is a key current collector in lithium-ion batteries, making it essential to cell performance, energy density and manufacturing cost.

Lithium-ion battery copper foil shipments were dominated by China, which accounted for 82.9% of global deliveries in 2025. EV Tank expects global shipments to reach 2.615mn t by 2030, implying continued expansion as battery output scales.

The product mix changed quickly during the year. The share of 8μm foil declined, while 6μm remained the mainstream product and accounted for more than 70% of total shipments.

Ultra-Thin Foil Gains Momentum on Copper Cost Pressure

Ultra-thin copper foil gained share as battery producers looked for ways to reduce copper input costs. Persistently high global copper prices pushed cell manufacturers to use thinner foil while maintaining battery performance.

The combined share of 5μm and 4.5μm ultra-thin foil rose to 24% in 2025. This is a major shift for a material category that requires tighter production control, better surface quality and stronger consistency.

Thinner copper foil can help reduce battery weight and improve energy density. It also lowers the amount of copper used per cell, which becomes increasingly important when copper prices remain elevated.

EV Tank expects 5μm and thinner foil to become a key material for high-end batteries. This reflects the industry’s move toward lighter, higher-energy-density cell designs.

However, thinner foil also raises manufacturing difficulty. Producers must control pinholes, tensile strength, elongation, surface roughness and coating compatibility more precisely.

That technical barrier could separate higher-end suppliers from lower-cost producers. As battery customers shift toward thinner grades, qualification and process reliability will become more important than simple capacity.

China Leads Supply as Competition Intensifies

China’s 82.9% share of global shipments shows its dominant role in battery copper foil supply. The country has built large-scale capacity around its lithium-ion battery ecosystem, supported by domestic EV, energy storage and cell manufacturing growth.

Competition intensified in 2025 as the market recovered and producers brought earlier-built capacity on line. This created a more fluid ranking among suppliers.

Longdian Wason ranked first with a 12.2% market share. Huachuang New Material followed after capacity ramp-ups lifted output and sales.

Defu Technology and Jiayuan Technology ranked third and fourth, respectively. Seven companies in the top 10 changed positions during the year, showing how quickly capacity, customer access and product mix are reshaping the sector.

Battery makers also increased procurement from second-tier suppliers to improve supply stability. This suggests buyers are trying to diversify supplier bases rather than rely only on leading producers.

For copper markets, the trend is strategically important. Battery copper foil growth creates a direct link between copper demand and battery technology. But the move toward ultra-thin foil also means battery growth will not translate into copper demand on a simple one-to-one basis.

The sector is therefore entering a more technical phase. Volume growth remains strong, but material intensity, foil thickness, supplier qualification and copper price pressure will all shape future demand.

The Metalnomist Commentary

The copper foil market shows how battery growth can lift copper demand while also forcing material thrift. High copper prices are pushing battery makers toward thinner foil, making technology and process control as important as raw capacity.