The X-SEPA does much more than a typical separator - it is a crucial next- generation component that can improve reliability, performance, and lifespan. Whether high reliability for public buses or high power for air mobility, we can finely control the structure and physical properties of each of the X-SEPA's multiple layers to meet performance targets for wide-ranging applications.
The X-SEPA also extends battery life, minimizing the footprint of each battery and unlocking new potential for circular use.
We are able to customize an exceptional separator that meets your needs.

3DOM’S UNIQUE SEPARATOR

CONVENTIONAL SEPARATOR

Material	polypropylene / polyethylene
Pore structure	uneven and 2-dimensional
Porosity	about 40-50%
Porosity	150 - 250 ℃

3DOM SEPARATOR

Material	polyimide
Pore structure	even and 3-dimensional
Porosity	over 60%
Porosity	400℃ or higher

Material	polypropylene / polyethylene	polyimide
Pore structure	uneven and 2-dimensional	even and 3-dimensional
Porosity	about 40-50%	over 60%
Heatproof temperature	150 - 250 ℃	400℃ or higher

HOW IT WORKS

WHAT IS A SEPARATOR ?

A porous film separating the cathode and anode (positive and negative electrodes) that ions pass through during charging and discharging.

WHY IS IT IMPORTANT ?

Short circuiting and fires occur when separator function is lost, and the cathode and anode connect. The separator is therefore crucial to maintaining battery safety.

DR. KANAMURA'S DISCOVERY

3DOM CTO Dr. Kiyoshi Kanamura saw the separator as the key to unlocking next-generation battery technologies and invented the 3DOM separator at Tokyo Metropolitan University.

THE SEPARATOR IS THE SOLUTION

BALANCE OF ENERGY DENSITY AND RELIABILITY

High energy density materials are required to extend electric vehicle range, but higher energy density accelerates uneven chemical reactions that lead to short circuiting, stunting battery reliability and hindering commercialization.Next-generation applications demand a battery that achieves both high energy density and reliability.

The unique structure of the 3DOM separator provides two layers of protection against dendrite formation, the main cause of short circuits. Plus, superior heat resistance means that the separator will keep doing its job even in the rare event of an accident, keeping the extent of damage to a minimum.The 3DOM separator ensures reliability even in next-generation battery chemistries with high energy density.

EXTENDED LIFESPAN

Longer battery life is important from both environmental and practical perspectives.As battery demand skyrockets in the coming years, it will be critical to keep manufacturing to a minimum while maximizing the impact of each and every battery in circulation. Longer life will also reduce battery cost per charge/discharge cycle, making batteries more accessible.

High porosity allows the separator to hold more electrolyte and extends battery cycle life, or the number of times a battery can be charged and discharged before losing performance.The 3DOM separator helps to maximize the useful life of resources within the battery, lowers cost per charge/discharge cycle, and makes battery reuse feasible.

LITHIUM-ION
BATTERY CELLS

3DOM batteries push technological boundaries, enabling us to redefine the battery as a vital element of social infrastructure in a sustainable society.

battery 3DOM’s innovative lithium-ion batteries offer superior reliability, energy density, and lifespan made possible by the 3DOM separator, meeting the needs of growing mobility and energy storage markets.

LIBDOM

ENERGY DENSITY>200Wh/kg

CYCLE LIFE3600cycles

CERTIFIED RELIABILITYUN 38.3IEC 62619

CUTTING-EDGE