Anode active material for sodium battery, anode, and sodium battery
A negative electrode active material and sodium battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as dependence and inability to adjust power output, and achieve the effect of improving cycle performance
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Embodiment 1
[0076] (Preparation of negative electrode)
[0077] An Al foil having a thickness of 20 μm and a diameter of 16 mm was used as a current collector for the negative electrode. will have an average particle size d of 10 μm 50 and 30μm maximum particle size d max sodium titanate (Na 2 Ti 3 O 7 ) as the negative electrode active material. Acetylene black was used as a conductive auxiliary material, and polyvinylidene fluoride was used as a binder.
[0078] Na in ratios of 85%, 5%, and 10% by mass, respectively 2 Ti 3 O 7 , acetylene black and polyvinylidene fluoride are mixed. N-methyl-2-pyrrolidone (NMP) was added dropwise to the mixture and mixed with the mixture to make a paste. A paste was applied to the Al foil and pressed to have a thickness of 50 μm. The paste was dried at 120° C. for 60 minutes to form the negative electrode 1 (this reference number is provided for simplicity and is not the reference number in the drawings. The same is hereinafter.).
[0079] (...
Embodiment 2
[0087] In addition to using d with an average particle size of 5 μm 50 and 15μm maximum particle size d max sodium titanate (Na 4 Ti 5 O 12 ) in place of Na in negative 1 2 Ti 3 O 7 Other than that, the negative electrode 2 and the sodium battery 2 were manufactured in the same manner as in Example 1.
Embodiment H-1
[0099]Regarding the electrolyte and the separator, the specific structure of the half-cell is described above. The positive electrode contained an Al foil having a thickness of 20 μm and a diameter of 12 mm as a current collector for the positive electrode. will have an average particle size d of 10 μm 50 and 30μm maximum particle size d max sodium titanate (Na 2 Ti 3 O 7 ) as the positive electrode active material. Acetylene black was used as a conductive auxiliary material, and polyvinylidene fluoride was used as a binder. Na in ratios of 85%, 5%, and 10% by mass, respectively 2 Ti 3 O 7 , acetylene black and polyvinylidene fluoride are mixed. N-methyl-2-pyrrolidone (NMP) was added dropwise to the mixture and mixed with the mixture to make a paste. The paste was applied to Al foil and pressed to have a thickness of 50 μm. The paste was dried at 120° C. for 60 minutes to form the positive electrode 1 . The water content Q of the positive electrode 1 is Q<100 ppm. ...
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