Graphite mining diversifies faster than battery grade supply
The IEA’s 2035 outlook puts a sharp drop in China’s mining share alongside only a slight easing in its battery-grade position.
The IEA expects natural graphite mining to spread geographically much faster than battery-grade supply through 2035. New origins broaden the mine map, while specialised conversion, material choice and commercially operating plants determine whether that change reaches anode buyers.
Why the two maps diverge
Graphite diversification looks faster from the mine gate than from the anode plant. In the International Energy Agency's 2026 base case, China's share of natural graphite mining falls from about 80% in 2025 to 53% in 2035. Its share of battery-grade supply moves from 94% to 91%. The first map changes substantially. The second barely moves. IEA
Those percentages describe different material systems. The mining figure covers natural graphite. Battery-grade supply combines spherical natural graphite with synthetic anode output. An additional natural graphite mine changes the first measure immediately. It changes the second only through processing, product choice and operating supply.
Key players
| No. | Participant | Role |
|---|---|---|
| 1 | International Energy Agency | Market estimates and conditional projections for mining and battery-grade supply |
| 2 | POSCO Future M | Planned intermediate processing and anode-manufacturing route in Korea |
| 3 | Talga | Proposed integrated natural-graphite anode route in Sweden |
| 4 | EAS Batteries and Dainen Materials | Prospective product and qualification relationships with Talga |
| 5 | Syrah Resources | Operating US anode plant and disclosed commercial conditions for expansion |
| IEA base case | China share in 2025 | China share in 2035 |
|---|---|---|
| Natural graphite mining | About 80% | 53% |
| Mixed battery-grade supply | 94% | 91% |
Source: IEA, Global Critical Minerals Outlook 2026, p. 172. These 2035 values are published in the report text and are not interpolated from the annex.
The chart exposes the article's central asymmetry. The projected mining share falls sharply, while battery-grade concentration stays near its starting level. New extraction capacity can therefore widen the list of origins long before it changes the supply available to anode buyers.
The concentration moves downstream
Recent evidence shows how processing can remain concentrated while mine projects spread. An IEA comparison puts China's share of refined graphite at 95% in 2023 and 94% in 2025. A separate IEA chart attributes 97.8% of the net increase in refined graphite production over 2020–24 to China. One is a share at two dates and the other a contribution to growth over an interval. They support a finding of persistent concentration, not a claim that China's share rose every year. IEA share comparison · IEA growth comparison
The comparison locates the capacity constraint behind the article's processing argument. Expected graphite supply outside China could meet 28.0% of 2030 demand outside China, while anode capacity could meet 26.7%; battery-cell capacity reaches 122.8%. The imbalance means downstream cell capacity can appear ample while the graphite and anode stages remain thin. These are stage-specific coverage ratios, not a material-flow balance, and they do not establish operating output, qualification or substitutability.
POSCO Future M's planned Korean route makes the missing stages visible. African graphite would undergo spheroidisation and purification at Saemangeum before anode manufacture at Sejong. The plan would change conversion geography as well as feedstock origin. It has yet to establish operating output from that sequence. POSCO Future M
A mine can therefore supply a processing centre without relocating the stages that create battery-grade form. A processing plant can also draw on several mine origins. The two maps describe connected parts of one market, but buyers cannot use them as substitutes for each other.
Battery grade follows more than ore
Material choice creates a second source of divergence. The IEA reports that synthetic graphite supply grew 22% in 2025 while natural spherical supply fell 3%. Its longer composition series shows a broader move towards synthetic material with reversals along the way. Natural and synthetic graphite are not interchangeable in every application. The shift means a proposed natural-graphite route must earn a place in customers' product mix rather than inherit battery demand automatically. Rising coke costs remain a counterforce to a simple assumption of continuing synthetic cost advantage. IEA
Talga's relationships with EAS Batteries and Dainen Materials put that product test inside one proposed European route. EAS plans joint work on specifications, quality requirements and testing. Dainen links qualification against customer requirements with prospective offtake and investor engagement. Both relationships remain non-binding and concern the same Swedish project. They show the additional work required before a new natural origin occupies a place in battery-grade supply. Talga and EAS · Dainen Materials
Mine capacity can broaden geographic choice while leaving processing, qualification and material competition unresolved. The commercially relevant change arrives when the route repeatedly produces material that customers accept and buy.
Announced routes face an operating test
Syrah Resources offers the harder test. Its Vidalia plant in Louisiana had produced active anode material for testing and process validation by the quarter ended 30 June 2026. The start of sales remained subject to qualification, commercial and US-policy considerations. Syrah also said sales and significant customer commitments were vital to financing further capacity. Equipment was operating, while sustained commercial supply and expansion remained conditional. Syrah Resources
Vidalia does not predict Talga or POSCO. It demonstrates why announced capacity cannot complete the processing map. Repeatable output, customer acceptance, sales and investment can occupy different stages. Existing processors, multisourcing, new equipment or faster projects could still make diversification advance more quickly than the IEA expects.
Natural graphite mining can thus diversify without an equivalent shift in battery-grade supply. The IEA base case is conditional, and actual qualified output can overturn it. Until then, new mine origins describe a larger opportunity set. Qualified battery-grade production and sustained commercial shipments show how much of that opportunity has reached buyers.
What GEB can do next
GEB offers a free consultation to discuss how its intelligence services could assist a business. A graphite review can separate mine origin, processing location, material route, qualification state and commercial availability. Any subsequent work and verification scope would need to be agreed separately. This invitation carries no claim of available material, customer qualification or secured supply.
Evidence and limits
The IEA analysis uses selected substantive pages from the Global Critical Minerals Outlook 2026, not a claim that the whole report or its underlying commercial datasets were audited. The 2025–35 shares are base-case estimates and projections. Natural mining and mixed battery-grade supply are different constructs; the latter combines spherical natural and synthetic anode output. The 2023–25 share comparison and 2020–24 net-growth contribution use different measures and vintages. Company records are attributed evidence. POSCO describes a planned route; Talga's customer relationships are non-binding; Syrah supplies one operating case with dated conditions. No company case establishes a universal project sequence or current sector-wide outcome.