Japan Lab Doubles Aqueous Aluminum Battery Capacity With Carbon Rubber Sheet
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Kawanishi – September 28, 2026 -- Green Science Alliance has more than doubled the performance of its aqueous rechargeable aluminum-ion battery (AAIB) by swapping the cathode current collector for a commercially cheap conductive carbon rubber sheet, according to research led by Dr. Ryohei Mori.
Capacity climbs to 210 mAhg-1 from an earlier 103 mAhg-1 baseline
Under 0.025 C at room temperature, the redesigned AAIB delivered an initial capacity of at least 210 mAhg-1, sustained through at least 25 cycles in ongoing testing. The prior generation of the technology, detailed in Mori's 2025 review article in the Royal Society of Chemistry journal Energy Advances (DOI: 10.1039/D5YA00148J), had capacity of roughly 103 mAhg-1 with poor cycle stability.