Nonaqueous electrolyte battery
A non-aqueous electrolyte and battery technology, applied in the direction of non-aqueous electrolyte batteries, electrolytes, secondary batteries, etc., can solve the problems of deterioration of the crystal structure of active materials, low porosity of electrode component layers, and easy deviation of Li ion concentration.
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[0017] According to an embodiment, there may be provided a nonaqueous electrolyte battery. The nonaqueous electrolyte battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode includes a positive electrode current collector and a positive electrode material layer formed on the positive electrode current collector. The positive electrode material layer contains a positive electrode active material and a first conductive agent. The 1st conductive agent has in 1350 ± 10cm -1 Appeared D-band and at 1590±10cm -1 In the G band that appears, the ratio of the integrated intensity of the D band to the integrated intensity of the G band is greater than 0.6 and 10 or less. In the constituent material map image of the positive electrode material layer obtained by Raman spectroscopy, the ratio of the area occupied by the first conductive agent to the area occupied by the positive electrode active material is 1.5 or more and 5 or le...
Embodiment 1
[0089] In embodiment 1, according to the steps described below to make and figure 1 and figure 2 The same non-aqueous electrolyte battery 10 is shown.
[0090] [Production of positive electrode 3]
[0091] Preparation of lithium-containing nickel-cobalt-manganese composite oxide LiNi as positive electrode active material 0.6 co 0.2 mn 0.2 o 2 , Acetylene black as the first conductive agent, graphite as the second conductive material, and polyvinylidene fluoride as the binder.
[0092] Raman measurement was carried out on the prepared acetylene black, and the result is in the obtained Raman spectrum, at 1350cm -1 The first peak appears nearby, at 1590cm -1 The second peak appeared nearby, and the ratio of the integrated intensity of the first peak to the integrated intensity of the second peak was 0.8.
[0093] The Raman measurement was carried out on the same graphite as the prepared graphite. As a result, in the obtained Raman spectrum, at 1350cm -1 The first peak a...
Embodiment 2
[0136] The nonaqueous electrolyte battery 10 of Example 2 was produced in the same manner as in Example 1 except that the bead mill dispersion conditions were changed to the conditions described in Table 1.
[0137] For the non-aqueous electrolyte battery 10 of Example 2, the capacity retention rate and the constituent material map image for the positive electrode material layer were obtained in the same manner as in Example 1. The capacity retention rate, occupied area ratio, and distance ratio between nearest neighbor particles of the nonaqueous electrolyte battery 10 of Example 2 are shown in Table 1 below.
[0138] In addition, the energy density of the positive electrode of the nonaqueous electrolyte battery of Example 2 was the same as that of Example 1.
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