Lithium metal batteries, built on anodes we deposit ourselves.

FLUX produces uniform ultra-thin lithium metal anodes by vacuum physical vapor deposition, and the high energy density cells that run on them.

Request a sample See cell specifications

FLUX LM-X5 and LM-X12 lithium metal battery cells

Energy density: 500 Wh/kg
Anode thickness: < 20 µm
Deposition width: > 250 mm
Operating range: −20 to 60 °C

“Safer, For Longer.”

We aim to be a global leader in next-generation energy storage, redefining robotics, drones, and future mobility through sustainable lithium metal technology that unites performance, efficiency, and environmental responsibility.

FLUX Corporation, founded July 2024 in Cheonan, Republic of Korea.

A uniform lithium film is the whole problem.

Conventional lithium metal anodes deposit unevenly. The rough surface seeds dendrites, dendrites pierce the separator, and the cell fails. Our vacuum PVD process lays down a film flat enough that the dendrites never start.

Ultra-thin lithium metal film deposited on copper foil

Advanced battery technology

Next-generation lithium metal anode solutions.

Three-dimensional plot of deposition thickness uniformity across the substrate

Vacuum PVD technology

Lithium physical vapor deposition solutions.

Conventional lithium metal anode

Non-uniform films that seed dendrite growth
Particle formation during deposition
Thickness limited to under 20 µm
Width limited to under 100 mm

Cross-section showing dendrites growing through an uneven SEI layer into the electrolyte

FLUX lithium metal anode

Uniform ultra-thin lithium films
Dendrite growth suppressed
Stable Multi-SEI protective layer
Under 20 µm thick at over 250 mm wide

Cross-section showing a flat lithium layer under a stable Multi-SEI protective layer

Li-Metal eXtream cells for drones

Two pouch formats at 500 Wh/kg, sized for multirotor and fixed-wing platforms where every gram of payload counts.

LM-X5

Compact format

Nominal capacity	5 Ah
Energy	19 Wh
Nominal voltage	3.8 V
Energy density	500 Wh/kg
Dimensions	50 × 85 mm
Cycle life	≥ 350 cycles
Operating temperature	−20 to 60 °C

LM-X12

Extended format

Nominal capacity	12 Ah
Energy	45.6 Wh
Nominal voltage	3.8 V
Energy density	500 Wh/kg
Dimensions	80 × 110 mm
Cycle life	≥ 350 cycles
Operating temperature	−20 to 60 °C

Specifications are preliminary and subject to change. Write to us for the current datasheet and sample availability.

History

From founding to prototype cells in under two years.

2024.07FLUX founded.
2024.12LOI signed with the Korea Institute of Energy Research (KIER) for next-generation battery R&D.
2025.01Patent filed for lithium metal anode manufacturing using PVD technology.
2025.05Seed investment secured from the KAIST–MISK Double Impact Fund.
2025.06Collaboration initiated with PRETTL Group (Germany) on advanced battery materials.
2025.10300 × 300 mm PVD deposition R&D equipment established.
2026.Q1Prototype production of lithium metal batteries for drones began.

Talk to us about samples, testing, or supply.

flux@fluxdepo.com

We answer in English and Korean.

FLUX Corporation

82-17 Namsan 4-gil, Jiksan-eup
Seobuk-gu, Cheonan-si
Chungcheongnam-do 31034
Republic of Korea