FELDERION

Electrothermal carbon processing · Germany

A furnace follows a recipe. Felderion follows the material.

Felderion is developing a controlled electrothermal process for electrically conductive carbon materials, in which the material's own electrical response determines when treatment is complete. The first application is the reconditioning of battery anode graphite recovered from hydrometallurgical recycling.

Patent pending · DPMA priority filing · July 2026

The problem Work with us

01 — The problem

Waste is never the same twice.

Recovered and residual carbon feedstocks vary between lots. Residual chemistry, surface films, moisture, particle contact, packing state and electrical conductivity all shift from batch to batch.

Every conventional thermal process answers this with a fixed recipe: a set temperature and a set time. Run the same recipe on two different lots and you can obtain two different materials. One is over-treated, one is under-treated, and the difference is discovered afterwards in a laboratory.

This is why recovered carbon rarely re-enters a high-specification application. Not because the material is unusable, but because the process cannot reliably determine when the required state has been reached.

02 — The process

The bed is the heating element. It is also the sensor.

Felderion arranges conductive carbon as an unconsolidated particulate bed between electrodes and passes current directly through it. The material generates its own Joule heat, avoiding the need to heat a large furnace mass through a long thermal cycle.

During treatment, the bed's frequency-resolved electrical response is measured. As surface films decompose, volatiles leave and structure evolves, that response changes. When the defined endpoint is reached, the controller adjusts or terminates treatment.

Electrical input, current path, chemical potential, temperature-time history and material-state feedback are treated as a coupled system.

Conceptual Felderion closed-loop electrothermal process Recovered carbon enters an electrothermal reactor. The bed generates heat. An impedance module reads its frequency-resolved response and sends a signal to a controller, which adjusts or terminates treatment. Purified carbon exits. Feedstock Recovered carbon Electrothermal reactor Upgraded output Purified carbon Impedance module Frequency-resolved Controller Adjust or terminate Atmosphere in Off-gas out The bed generates the heat and provides the signal that ends the treatment.
Conceptual representation. Reactor geometry, operating corridors, atmosphere schedules and endpoint criteria are intentionally omitted.

03 — First application

The graphite comes out. Nothing takes it back.

Hydrometallurgical recycling is engineered primarily to recover valuable metals. Graphite can leave the same process as a low-value residue, despite remaining a strategic material.

Felderion's working thesis is that the graphite host can often be recovered through purification and surface reconditioning rather than remanufacture from virgin feedstock.

25%

The EU Critical Raw Materials Act sets a 2030 benchmark for 25% of the Union's annual consumption of strategic raw materials to be met from EU recycling. Graphite is listed as a strategic raw material.

Source: Regulation (EU) 2024/1252

04 — The platform

The architecture is not specific to graphite.

The same coupled architecture can be evaluated for carbon feedstocks that form an electrically conductive particulate bed. Graphite regeneration is where the process is being proven first. Further property-defined applications will follow only as data is generated.

Hard carbonSoft carbonCarbon blackCoke-derived carbon CharActivated carbonRecovered carbon fibre Conductive carbon blendsSilicon-carbon composites

01

Particulate

Purified, reconditioned or graphitised carbon discharged as a particulate product.

02

Net-shape

A future product route in which treated carbon is consolidated at temperature without a separate cooling, milling and reheating cycle.

05 — Evidence before claims

The numbers will follow the data.

Felderion will publish quantified energy, carbon and performance claims only after experimental validation against a clearly defined reference process.

01Energy usekWh per kilogram
02Carbon intensitykg CO₂e per kilogram
03Material qualityApplication-relevant specification
04YieldRecovered usable material
05RepeatabilityLot-to-lot consistency

06 — Development roadmap

Early stage, clearly stated.

  1. 01
    Scientific conceptCompleted
  2. 02
    Patent filedCurrent position · July 2026
  3. 03
    Technology validationNext
  4. 04
    Pilot demonstrationPlanned
  5. 05
    Industrial partnershipPlanned
  6. 06
    Commercial deploymentFuture

07 — About

Built by a materials scientist with scientific and industrial experience.

Felderion was founded by Dr.-Ing. Tarini Prasad Mishra, a materials scientist specialising in electric-field-assisted processing and advanced manufacturing.

He completed his doctorate summa cum laude at Forschungszentrum Jülich and has worked across scientific research, battery and materials strategy, recycling, and industrial business development.

Felderion is an independent venture and is not affiliated with, endorsed by, or acting on behalf of any current or former employer or institution.

08 — Work with us

We are looking for two specific partners.

A European hydrometallurgical recycler with a recovered graphite fraction it currently has no strong route to sell.

A cell or anode manufacturer willing to define precisely what reusable graphite must achieve.

We also welcome contact from research organisations and strategic investors. Initial discussions can be held under confidentiality.

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