All-solid-state battery
A technology of all-solid batteries and solid electrolyte layers, applied in solid electrolytes, secondary batteries, battery electrodes, etc., can solve the problems of reduced cycle characteristics and achieve excellent cycle characteristics
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no. 1 approach
[0033] First, a first embodiment of the present invention will be described. In this embodiment, if figure 1 As shown, the all-solid battery 10 has a laminate 20 , a positive external electrode 60 , and a negative external electrode 70 . Such as figure 2 As shown, the laminated body 20 of this embodiment is a hexahedron having four side surfaces 21 , 22 , 23 , and 24 , and an upper surface 25 and a lower surface 26 . In addition, the positive external electrode 60 and the negative external electrode 70 are formed on any pair of opposing side surfaces. also, figure 1 In one embodiment of the all-solid-state battery 10, in figure 2 The positive external electrode 60 is formed on the side face 21 of the stacked body 20 and the negative external electrode 70 is formed on the side face 22 .
[0034] Such as image 3 As shown in the cross-sectional view of the laminated body of , in the laminated body 20 , the positive electrode 30 and the negative electrode 40 are laminated...
no. 2 approach
[0086] Next, an all-solid-state battery according to a second embodiment of the present invention will be described. In addition, in the description of the second embodiment, the same reference numerals are assigned to the same structures as those of the all-solid-state battery 10 of the first embodiment, and description thereof will be omitted.
[0087] In the all-solid-state battery of the present embodiment, only the current collector layer of either the positive electrode or the negative electrode has the enlarged junction. Figure 5 In the illustrated example, only the positive electrode 30 has the enlarged joint portion on the positive electrode current collector layer 31 , and the negative electrode 40 does not have the enlarged joint portion on the negative electrode current collector layer 41 . Even with the above configuration, as in the first embodiment, the stress load due to volume expansion is lessened than before, cracks in the all-solid battery are suppressed, an...
Embodiment 1
[0093] (Production of positive electrode active material and negative electrode active material)
[0094] As the positive electrode active material and the negative electrode active material, lithium vanadium phosphate (Li vanadium phosphate) made by the following method was used 3 V 2 (PO 4 ) 3 ). As its production method, Li 2 CO 3 , V 2 o 5 , NH 4 h 2 PO 4 As the starting material, the ball mill was used for 16 hours of wet mixing, and the powder obtained after dehydration and drying was pre-calcined in a nitrogen-hydrogen mixed gas at 850°C for 2 hours. The calcined product is wet pulverized by a ball mill, and then dehydrated and dried to obtain positive electrode active material powder and negative electrode active material powder. The composition and crystal structure of the prepared powder are Li 3 V 2 (PO 4 ) 3 The condition was confirmed using ICP emission spectrometry and X-ray diffraction apparatus.
[0095] (Preparation of paste for positive electr...
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Abstract
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