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US 12,113,172 B2Granted
Power storage device pre-doping agent and production method for same
AssigneeTayca Corporation
InventorsKeiichi Watanabe, Yuta Kakimoto, Shunsuke Mito
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AssigneeTayca Corporation
InventorsKeiichi Watanabe, Yuta Kakimoto, Shunsuke Mito
Estimating the term…
A pre-doping agent for a power storage device includes a lithium iron oxide represented by Formula (1), wherein in X-ray diffractometry, a half width of a diffraction peak at a diffraction angle (2θ) of 23.6°±0.5° is 0.06° to 0.17°, and an intensity ratio (I44.6/I23.6) of a diffraction peak intensity (I44.6) at a diffraction angle (2θ) of 44.6°±0.5° to a diffraction peak intensity (I23.6) at a diffraction angle (2θ) of 23.6°±0.5° is less than 8%. The pre-doping agent for a power storage device with a large irreversible capacity can be suitably used as a power storage device, which can suppress reduction in a volume energy density of a power storage device, can reduce a production cost, can prevent decomposition of an electrolytic solution. LixFeOy (1) wherein x meets 3.5≤x≤7.0 and y meets 3.1≤y≤5.0.
A pre-doping agent for a power storage device comprising a lithium iron oxide represented by Formula (1), wherein in X-ray diffractometry, a half width of a diffraction peak at a diffraction angle (2θ) of 23.6±0.5° is 0.06 to 0.17°, and an intensity ratio (I44.6/I23.6) of a diffraction peak intensity (I44.6) at a diffraction angle (2θ) of 44.6±0.5° to a diffraction peak intensity (I23.6) at a diffraction angle (2θ) of 23.6±0.5° is 2% or less:
A pre-doping agent for a power storage device comprising a lithium iron oxide represented by Formula (1), wherein in X-ray diffractometry, a half width of a diffraction peak at a diffraction angle (2θ) of 23.6±0.5° is 0.06 to 0.17°, and when 5% by weight of Si powder as an internal standard substance is added to the pre-doping agent, an intensity ratio (I44.6/I28.5) of a diffraction peak intensity (I44.6) at a diffraction angle (2θ) of 44.6±0.5° to a diffraction peak intensity (I28.5) at a diffraction angle (2θ) of 28.5±0.5° is 7% or less:
Dependencies are inferred from the claim text.