SiNTL™ Next-Generation Battery Materials
Aluminium-coated silicon nanoparticles for high-performance lithium-ion battery anodes.
The battery industry has long known silicon outperforms graphite. The challenge has been making it work reliably at scale.
SiNTL™ is our solution.
Silicon anodes have approximately 10 times the theoretical capacity of the graphite anodes used in most lithium-ion batteries today. The problem is that silicon expands significantly during charging, causing cracking, capacity loss and shortened battery life. Most solutions to date have been technically complex, expensive, or incompatible with existing manufacturing lines.
SiNTL™ is our solution. We are embedding Silicon nanoparticles into a graphite matrix which avoids common problems associated with silicon (cracking, etc.). This is a patented nanotechnology that stabilises silicon nanoparticles using an aluminium coating, then embeds them into a graphite matrix. The aluminium coating addresses conductivity and oxidation resistance; the graphite matrix constrains the volume expansion that causes capacity fade. The result is a high-performance anode material that is practical, scalable and ready for commercial production.
How it works
01
Synthesis
One-pot aluminium coating method at 125-180°C. No hazardous gases, no complex processing steps.
02
In-situ coating
Aluminium coating forms around each nanoparticle during synthesis creating a uniform protective shell.
03
Stabilisation
The coating enhances conductivity and oxidation resistance while constraining volume expansion during charging.
04
Drop-in compatibility
Air- and water-stable material slots into conventional anode lines without retooling or new equipment.
SiNTL™ was developed at the George Washington University (GWU) in Washington, D.C. The process applies a thin aluminium coating to silicon nanoparticles in a single, low-temperature step using a one-pot method with no HF or SiH4 and no new manufacturing infrastructure required.
The aluminium coating forms in-situ during synthesis, enhancing conductivity and oxidation resistance. The coated nanoparticles are then embedded into a graphite matrix, which constrains the volume expansion that typically degrades silicon anodes. The result is an air- and water-stable material compatible with existing anode production lines.
125-180°C
Synthesis temperature
~97%
Conversion yield
One-pot
Aluminium coating method
Zero
HF/SiH4
No hazardous gases
Key benefits
Better Batteries. Simpler manufacturing.
Our technology utilises readily available materials and costs a substantially less expensive than existing silicon and hybrid anode technologies. Synthesis of the material uses common techniques and scale-up is readily achievable. The material is a drop-in replacement to exiting graphite anode processes and requires no new process stream to produce.
Higher Energy Density Silicon’s theoretical capacity is approximately 10× that of graphite, enabling batteries that store more energy in the same or smaller form factor.
Faster Charging Higher capacity anodes can support faster ion transfer, reducing charge times across EV, drone and consumer electronics applications.
Longer Cycle Life The aluminium coating and graphite matrix work together to constrain volume expansion, reducing the capacity fade that limits silicon anode durability.
Simpler, Safer Manufacturing Low-temperature synthesis, no hazardous gases, and an air- and water-stable material that slots into conventional anode lines without retooling.
Cost-competitive at scale SiNTL™ uses readily available materials and common synthesis techniques, making it substantially less expensive than existing silicon and hybrid anode technologies. Scale-up is straightforward, and the material is a drop-in replacement for existing graphite anode processes with no new production infrastructure required.
530
mAh/g
Achieved in test calls – approximately 50% higher than conventional graphite anodes
600+
mAh/g
Target under active development at George Washington University
~360
mAh/g
Conventional graphite baseline – the ceiling SiNTL is designed to exceed
Market opportunity
A market growing from USD 0.4 billion (2025) to USD 25.8 billion by 2035[1]
Silicon anode batteries are widely recognised as a critical enabler for next-generation energy storage. Global demand is accelerating across electric vehicles, consumer electronics, grid storage and aerospace.
SiNTL™ is positioned to serve multiple high-growth markets.
Drones & UAV: Higher energy density extends range and payload capacity; faster recharge reduces operational downtime. (link to drone page)
Electric Vehicles: Higher energy density and faster charging extend driving range and accelerate EV adoption.
Consumer Electronics: Smaller, lighter batteries delivering longer run-times for mobile devices and wearables.
Grid & Renewable Energy Storage: Improved cycle life enhances the economics of batteries used to support solar and wind generation.
Aerospace & Defence: Lightweight, high-performance storage for aviation and strategic applications.
[1] Fact.MR, Silicon Anode Battery Market Global Market Analysis Report – 2035
Where SiNTL™ fits?
Built on a silicon materials platform
SiNTL™ is a natural extension of what 1414 Degrees already does. Our existing technologies are all built on expertise in silicon materials science and high-temperature processing. That foundation means we understand how to take silicon-based technologies from laboratory concept through to commercial application. The same rigour applied to thermal energy storage and hydrogen production is now being directed toward battery materials.
SiBrick®
Thermal energy storage using silicon’s phase-change properties
SiBox®
Modular silicon thermal battery system for commercial and industrial use.
SiPHyR®
High-temperature processing for hydrogen and carbon co-products.
SiNTL™
Aluminium-coated silicon nano-particles for battery anode applications
