Journal of Energy Storage· 2026Q1
A long-life fast charging lithium-ion energy storage device
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- Q1SCImago
- 2026year
Short summary
A prototype Li-ion device using LFP-LTO chemistry achieves over 27,000 cycles with <10% resistance increase and >85% capacity retention after 3-minute (20C) charging.
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Key points
- A prototype Li-ion energy storage device was engineered for fast charging.
- The device utilizes LFP-LTO chemistry with modified electrode loadings (70% active material, increased carbon).
- It achieves >85% capacity retention after 3-minute (20C) charging.
- Over 27,000 full cycles were completed at 15C charge/5C discharge with <10% resistance increase and capacity fade to 80%.
AI-generated from the title and abstract; the full text is not read.
Abstract
A long cycle-life high-power energy storage device is prototyped where the fast charge capability is focused on rather than the fast discharge capability. Instead of using a supercapacitor device, the reworking and engineering of a Li-ion device is prototyped. The aim of the work was to be able to charge in a matter of minutes without excessive degradation in capacity and without a significant increase in device resistance with continued cycling. To achieve these goals, a Lithium Iron Phosphate – Lithium titanate (LFP-LTO) chemistry was selected, with a number of modifications, such as reduced electrode loadings, lowering the active material content to 70%, while increasing the conducting carbon content including carbon fibre additives. These measures overall reduce the energy density to about 42 Wh kg −1 . Other measures are incorporated to improve the cycle life and power. More than 85% capacity retention is achieved at 20C or 3-min charging. Also, a long cycle life of over 27,000 full State-of-Charge cycles at high rate 15C/5C charge/discharge with little increase in resistance (<10%) concurrent with the capacity fade to 80% is achieved with a prototype device. Consequently, at CSIRO-Australia, we have designed a long-life high-power energy storage device ideal for a range of applications.
The authors' abstract, as published at the source. Journal of Energy Storage, 2026 · DOI ↗
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