TL;DR
Get business pricing on garage and car supplies
- Business-only prices and quantity discounts
- Tax-exempt purchasing
- Multiple users, one account, clear invoices
Graphene Manufacturing Group says its G CELL pouch cells completed 1,000 charge-and-discharge cycles, each taking six minutes, at a 7C rate without performance reduction reported as of October 7, 2026. The test was conducted by Indiana’s Battery Innovation Center; GMG has not provided enough information in the supplied report to establish how the laboratory result translates to commercial cells or vehicle use.
Graphene Manufacturing Group says its G CELL pouch cells completed 1,000 charge-and-discharge cycles, with each charge and discharge carried out in six minutes, without performance reduction reported as of October 7, 2026. The result comes from testing by Indiana’s Battery Innovation Center and concerns laboratory cells, not a commercial vehicle battery pack.
The Battery Innovation Center built the 1.5 amp-hour pouch cells and collected the test data. GMG said it developed and supplied the graphene materials from its Brisbane Battery Development Centre. The G CELLS are described by the company as graphene aluminum-ion cells that use no lithium or rare-earth materials.
The reported 1,000-cycle result was recorded at a 7C rate. GMG said this was double the cycle count in its previous update, which covered cells tested at 10C. The company also reported separate 10C results: one G CELL showed a 10% performance reduction after 393 cycles, while specific energy reached 58 watt-hours per kilogram during a six-minute charge, up from 39 Wh/kg in its prior update.
GMG reported 94% energy efficiency for G CELLS charged and discharged in six minutes. It compared that with 64% for a lithium titanate oxide cell tested on the same six-minute schedule. The source also says that LTO cell fell to 80% of its original capacity within 82 cycles, a level commonly treated as end of life. These comparisons involve specified laboratory tests; the reported rates and cycle conditions differ between the 7C result and some of the 10C comparisons.
Fast Charging Meets Cycle-Life Testing
The result addresses two properties that matter to fast-charging batteries: how quickly a cell can be charged and how much cycling it can withstand. If results like these can be reproduced in larger cells and under practical operating conditions, they could be relevant to electric vehicles and energy storage, where charging speed, usable lifetime and energy losses all affect system design.
The reported 94% efficiency is also relevant because energy lost during charging and discharging can become heat, requiring thermal management and reducing the energy available to the application. GMG Director Bob Galyen said energy not lost as heat is what makes fast charging practical at the system level. The company’s figures are early cell-test results, however, and do not by themselves establish pack-level performance, cost, safety, or commercial readiness.
fast charging graphene aluminum-ion battery
As an affiliate, we earn on qualifying purchases.
As an affiliate, we earn on qualifying purchases.
GMG’s Earlier Cell-Test Results
GMG is developing G CELLS under a joint development agreement with Rio Tinto. Its latest reported milestone raises the cycle count for testing at 7C to 1,000, while the previous update cited in the source covered testing at 10C. Because the rates differ, the two cycle counts should not be treated as a direct like-for-like durability comparison.
The supplied report also describes a separate 10C G CELL result: a 10% performance reduction after 393 cycles. It reports the LTO comparison at 10C and the 58 Wh/kg specific-energy result at a six-minute, 10C charge. These results provide a snapshot of GMG’s development program, not an independently established comparison across commercial products. The tests were conducted on 1.5 Ah pouch cells, a format and capacity that do not establish how larger cells will perform.
“Energy that isn’t lost as heat is what makes fast charging practical at the system level.”
— Bob Galyen, GMG director and former chief technology officer of CATL
high cycle life graphene battery cells
As an affiliate, we earn on qualifying purchases.
As an affiliate, we earn on qualifying purchases.
Laboratory Results, Commercial Questions
The report does not establish whether the 1,000-cycle test has been independently replicated, or specify detailed test conditions such as temperature, voltage limits, rest periods, and the precise measurement used to determine “no performance reduction.” It also does not give a full account of the test protocol or statistical variation across multiple cells. Those details matter when evaluating durability claims.
It remains unclear how the reported results would translate to larger cell formats or battery packs, and what the technology’s cost, safety characteristics, manufacturing yield and real-world service life would be. GMG’s description of its cells as containing no lithium or rare-earth materials is a company statement; the supplied material does not provide a full cell composition or independent verification. The 7C, 10C and LTO results also use different test conditions, limiting direct comparisons.
rapid charge energy storage batteries
As an affiliate, we earn on qualifying purchases.
As an affiliate, we earn on qualifying purchases.
Scaling and 10C Cycle-Life Work
GMG says its next priorities are to improve energy density and 10C cycle life and scale the technology to larger cell formats. The supplied report does not give a schedule for larger-format testing, product launches or commercial production. Further results will be needed to show whether the six-minute charging performance and cycle life can be maintained as cell size increases and test conditions become more representative of intended applications.
As an affiliate, we earn on qualifying purchases.
Key Questions
What did GMG report?
GMG reported that its G CELL pouch cells completed 1,000 six-minute charge-and-discharge cycles at a 7C rate without performance reduction reported as of October 7, 2026.
Who conducted the testing?
Indiana’s Battery Innovation Center built the 1.5 Ah pouch cells and collected the data. GMG supplied the graphene materials used in them.
Is this proof the cells are ready for electric cars?
No. The result concerns laboratory pouch cells. The report does not establish performance in a vehicle battery pack, commercial readiness, cost, or real-world service life.
How did the G CELLS compare with the LTO cell?
GMG reported 94% energy efficiency for a G CELL and 64% for an LTO cell under six-minute charge-and-discharge testing. It also said the LTO cell reached 80% of its original capacity after 82 cycles. These are company-reported test results, and not all of the cited tests used the same rate.
What is GMG working on next?
Chief Executive Craig Nicol said GMG’s stated priorities are improving energy density and 10C cycle life, then scaling to larger cell formats. The report gives no timeline for those milestones.
Source: rss
Halloween Picks
halloween
As an affiliate, we earn on qualifying purchases.
