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US 11,114,665 B2Granted
Energy storage device and method for producing same
AssigneeGS Yuasa International Ltd.
InventorsMasashi Takano, Akihiko Miyazaki
Life of this patent
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Abstract
There is provided is an energy storage device having improved power performance at a relatively large current. In the present embodiment, an energy storage device is provided, which has a negative active material layer containing particulate amorphous carbon, wherein a distribution curve of differential pore volume in the negative active material layer has a peak appearing within the range from 0.1 μm to 2 μm inclusive and the differential pore volume at the peak is 0.9 cm3/g or more.
Claims3
An energy storage device which has a negative active material layer containing particulate amorphous carbon,
- wherein an average particle size D50 of the amorphous carbon is 1.0 μm or more and 3.0 μm or less, and
- a distribution curve of differential pore volume in the negative active material layer has a peak appearing within a range from 0.1 μm to 2 μm inclusive and the differential pore volume at the peak is 0.9 cm3/g or more and 1.301 cm3/g or less.
Dependencies are inferred from the claim text.