Overview
ARBOK TEGA-Si is a lithium-ion anode material in which ordinary, feedstock-grade silicon is hosted inside the pores of TEGA — ARBOK's own graphene-like thermally expanded graphite, specific surface area 2,400–3,600 m²/g. Silicon gives a lithium-ion anode roughly ten times the capacity of graphite, but swells more than 300% on charge, cracking and losing electrical contact within a few hundred cycles. The industry answer is expensive nanostructured or pre-lithiated silicon composites ($200–400/kg) engineered so the particle itself survives expansion. TEGA removes the need for that engineering: the porous matrix absorbs the expansion mechanically and holds contact and conductivity itself, so ordinary silicon at feedstock price ($15–40/kg) performs at premium-composite cycle life.
Applications
EV battery gigafactories and cell manufacturers seeking higher-capacity anodes without the cost of engineered silicon composites. Applicable anywhere a lithium-ion anode line currently uses graphite or premium silicon-carbon composite.
Operating Principle
TEGA's porous graphene matrix (2,400–3,600 m²/g surface area, hundreds of times that of ordinary graphite at 5–20 m²/g) hosts silicon particles inside its pores rather than in a binder film. On lithiation, silicon's volume expansion is absorbed mechanically by the surrounding matrix instead of cracking the particle or breaking electrode contact. High surface area gives the silicon a fine, even distribution through the pores — that even distribution is what sustains cycle life, not the surface area by itself. The matrix stays self-conducting through the expansion cycle, holding contact and conductivity without a separate engineered shell around the silicon.
Key Parameters
| Parameter | Value |
|—|—|
| TEGA surface area | 2,400–3,600 m²/g (vs 5–20 m²/g ordinary graphite) |
| TEGA production cost | ~$50/kg |
| TEGA production rate | high-throughput mobile production units; capacity scales by adding units |
| Silicon feedstock cost (in TEGASI) | $15–40/kg (vs $200–400/kg engineered composites) |
| Cycle life | >1,500 cycles above 85% capacity retention |
| Baseline comparison (unbuffered Si mixing) | ~260 cycles at 57–72% retention |
| Silicon anode capacity vs graphite | ~10× |
| Silicon expansion on lithiation | >300% |
Architecture and Components
TEGA matrix: compact mobile production units with substantial per-unit capacity, sited at the gigafactory rather than shipped from a central plant. Silicon: ordinary feedstock-grade silicon, no nanostructuring or pre-lithiation required, loaded into the TEGA pore structure to form the composite anode material fed directly into the cell maker's anode line.
Advantages
Material: silicon expansion absorbed mechanically by the host matrix rather than by engineering the silicon particle itself, so commodity-grade silicon reaches premium-composite cycle life.
Performance: >1,500 cycles above 85% retention, against ~260 cycles at 57–72% for simple unbuffered silicon mixing.
Economics: TEGA at ~$50/kg and silicon feedstock at $15–40/kg replace $200–400/kg engineered composites — a $150–350/kg reduction per kg of anode material where premium powder previously sat.
Manufacturing and strategic: TEGA producible on site at high throughput, removing the logistics and lead time of imported engineered composite, and closing both price and supply-chain exposure for gigafactories outside China.
Integrations
ARBOK-NaTEG · EXTRACAP · AEROGRAPH (Graphene AeroGel) · LiGra-BATTERY(Lithium-Graphene) · MAGNA (Metal-Graphene)
Shares the TEGA production platform with ARBOK-NaTEG; same mobile-unit manufacturing model applied to a lithium-ion rather than sodium-ion chemistry.
Deployment & Operation
TEGA is produced on-site by compact mobile production units, feeding directly into the gigafactory's existing anode line. Cell integration follows standard anode-manufacturing practice.
TRL
TEGA production itself is established at industrial rate. TEGASI composite formulation is stated as in development; no formal TRL rating for the complete anode/cell is recorded in the base.
Market Potential
Anode material market: $11 billion in 2026, reaching $81 billion by 2030 at approximately 33.6% annual growth. At today's global cell-production capacity (~2,500 GWh/year), TEGASI displaces over $14 billion/year in engineered silicon composite cost; by 2036, at a projected 5,000 GWh/year, over $28 billion/year. Over 75% of current cell-production volume is concentrated in China; EU and US gigafactory build-out represents the addressable expansion market for on-site TEGA production.
Typical Project Economics
TEGA production: ~$50/kg material cost, from mobile production units with substantial per-unit capacity. At one gigafactory (40 GWh/year) with silicon at 10% of anode mass in premium composite, the displaced composite spend is over $270 million/year. Payback on ARBOK's franchise (BOO) module: 5–7 years.
Risk Factors
TEGASI composite formulation is still in development; no formal TRL rating exists for the assembled anode/cell. The 1,500-cycle/85%-retention figure and the 260-cycle baseline comparison appear without a stated third-party validation source in the base. Silicon loading ratio and cell-integration parameters are not yet fully specified.
Related Technologies
ARBOK-NaTEG · EXTRACAP · AEROGRAPH (Graphene AeroGel) · LiGra-BATTERY(Lithium-Graphene) · MAGNA (Metal-Graphene) · ARBOK-TEGAMOS