As the global energy transition accelerates, sodium-ion batteries (SIBs) are emerging as a critical complement to lithium-ion technologies, thanks to their abundant resources and low cost. Today, a revolutionary advancement enters the market: ultra-stable sodium metal chips have achieved industrial-scale production, marking a new era in SIB commercialization.

Technological Leap: Redefining Sodium Metal Anode Standards

Traditional sodium metal anodes have long faced three major challenges: unstable interfaces due to high reactivity, safety risks from dendrite growth, and oxidation sensitivity during processing. The newly developed sodium metal sheets overcome these barriers through three key innovations:

1. Ultra-High-Purity Base Material (≥99.99%)
A vacuum distillation–zone melting hybrid process reduces impurities to <10 ppm (90% lower than industry standards), minimizing side reactions. Third-party tests confirm 500+ cycles at 1C with 91% capacity retention.

2. Biomimetic Composite Interfacial Layer
An atomic-layer-deposited (ALD) artificial SEI layer delivers:

Ionic conductivity of 8.3×10⁻³ S/cm (near liquid-electrolyte levels)

98% dendrite suppression (validated by synchrotron in situ imaging)

72-hour air stability (<0.1% oxidation weight gain without encapsulation)

3. Modular Thickness Control (0.05–1.2 mm)
A precision rolling technology enables customization for diverse battery systems:

(1)0.05 mm sheets: For cells exceeding 200 Wh/kg

(2)0.8 mm standard: Compatible with hard carbon/Prussian blue cathodes

(3)1.2 mm reinforced: Designed for long-duration energy storage

Industrialization: From Lab to Gigawatt-Scale Production

Current milestones include:

(1)Pilot phase: Co-developed 280 Ah energy storage cells with CATL (185 Wh/kg, 82% capacity retention at -30°C)

(2)Production lines: 1,000-ton/year capacity in Sichuan (Q4 2024), scaling to 5,000 tons by 2025

(3)Cost: Projected at $50/kg at scale (1/5 the price of lithium metal anodes material)

Applications: Transforming Energy Storage Across Industries

1. Grid-Scale Storage

Enables 4+ hour systems with LCOS of $0.08/kWh

Secured 200 MWh pilot order from SPIC

2. Electric Mobility

Eliminates winter range anxiety in A00 EVs (76% range retention at -20°C)

Automotive-grade packs (with BYD) to launch in 2025

3. Consumer Electronics

0.3 mm flexible sheets unlock wearable device potential