GMG Announces Long Life Battery Cycling Data
Original announcement by orestocks on
- Company
- Graphene Manufacturing Group Ltd.
- Ticker
- GMG.V
- Exchange
- Unavailable
- Region
- Queensland, Australia
- Primary commodity
- Lithium
- Secondary commodities
- None reported
- Document categories
- Metallurgy
- Extracted
- 2026-09-09 13:03:29 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
GMG has released cycling data for its G®CELLS graphene battery technology, showing no performance degradation after 489 fast-charge cycles. The cells exhibited very low resistance and minimal temperature increase compared to Lithium Titanate Oxide (LTO) benchmarks, although energy density is currently below the company's long-term target.
Reasoning: The company demonstrated exceptional fast-charging durability and thermal performance in G®CELLS compared to LTO benchmarks, though energy density remains a work in progress.
Positive factors
- exceptional cycling stability (489 cycles with no degradation)
- very low internal resistance (5 mOhms)
- minimal temperature rise (4C above ambient)
- independent validation by BIC
Negative factors
- energy density is currently unoptimized (39 Wh/kg vs target 50 Wh/kg)
Facts used in scoring: 2
Classification and evidence
Bench Scale Onlynegative
Only preliminary bench tests completed — no locked-cycle or pilot work.
Why it applies: Data is from cell-level testing at the BIC, representing early-stage development rather than pilot or commercial scale.
Evidence · text
“this is unoptimized and the Company believes it can bring this energy density back up”
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: the document describes a mill_cil route ("CIL")
Multi-Domain Testedpositive
Variability across ore domains (oxide, transition, fresh) has been addressed.
Why it applies: 2 distinct composites were tested
Extracted facts
Stored fact records: 2. Some facts used in scoring do not have a stored record.
Metallurgical Results (2)
cyclinglithiumView all detailsHide details
Identity
- Commodity
- lithium
- Ticker
- GMG.V
Test Work
- Program Status
- preliminary
- Test Type
- cycling
- Processing Route
- 10C / 10C charge/discharge
- Sample
- G®CELLS (1 Ah cells, 10C/10C charge/discharge)
Recovery
- Recovery Basis
- unspecified
Reagents
- Reagent Notes
- Very low resistance of ~0.005 Ohms (5 mOhms) allowed for a very low temperature increase of 4oC above ambient. Energy density of 39 Wh/kg.
Lab
- Laboratory
- Battery Innovation Center of Indiana (BIC)
Location
- Loc. Confidence
- medium
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-09T00:00:00.000Z
Reasoning: Exceptional cycling life and thermal stability demonstrated under fast-charge conditions.
Positive factors
- no performance reduction after 489 cycles
- low resistance (5 mOhms)
- low temperature rise (4C)
Negative factors
- energy density (39 Wh/kg) is unoptimized
Evidence · text
“G®CELLS have cycled with no performance reduction after 489 cycles”
cyclinglithiumView all detailsHide details
Identity
- Commodity
- lithium
- Ticker
- GMG.V
Test Work
- Program Status
- preliminary
- Test Type
- cycling
- Processing Route
- 10C / 10C charge/discharge
- Sample
- LTO (Lithium Titanate Oxide) benchmark cell
Recovery
- Recovery Basis
- unspecified
Reagents
- Reagent Notes
- Degraded to 86% of original capacity within 64 cycles. Resistance up to 0.030 Ohms. Temperature increase of 19C above ambient.
Lab
- Laboratory
- Battery Innovation Center of Indiana (BIC)
Location
- Loc. Confidence
- medium
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-09T00:00:00.000Z
Reasoning: Used as a benchmark to demonstrate the superior durability of G®CELLS.
Negative factors
- rapid degradation (86% capacity in 64 cycles)
Evidence · text
“LTO battery which... degraded to 86% of original capacity... within 64 cycles”
How Atlas produces this analysis
Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.