Nonaqueous electrolyte battery
A non-aqueous electrolyte and battery technology, applied in the direction of non-aqueous electrolyte storage batteries, secondary batteries, battery electrodes, etc., can solve problems such as thermal runaway and intense battery behavior, and achieve the effect of stabilizing the crystal structure
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Embodiment 1
[0049] As shown in Table 1 below, in Example 1, a lithium-manganese-magnesium composite oxide (LiMnMg) having a spinel crystal structure and a part of the Mn position in the crystal substituted with Mg was used in the positive electrode active material. 2-x Mg x o 4 , 02 / g, the tap density when repeated 30 times is 1.8g / cm 3 . After pressing so that the thickness of the positive electrode mixture layer W2 is 80 μm per one side of the aluminum foil W1, a phosphazene compound (manufactured by Bridgestone Co., Ltd., commercial product) is formed so that the thickness is 6 μm (one side). A flame retardant layer W6 named Phoslight (registered trademark, solid state) was used to produce a positive electrode plate. The ratio W6 / W2 of the thickness of the flame retardant layer W6 to the thickness of the positive electrode mixture layer W2 was 0.075. On the other hand, graphite material C in which the surfaces of graphite particles G are coated with pyrolytic carbon P is used as t...
Embodiment 2～ Embodiment 7
[0053] As shown in Table 1, in Examples 2 to 7, the ratio of the phosphazene compound contained in the flame retardant layer W6 of the positive electrode plate and the thickness of the flame retardant layer W6 relative to the thickness of the positive electrode mixture layer W2 were changed. Except for the ratio W6 / W2, the lithium ion secondary battery 20 was obtained in the same manner as in Example 1. That is, in terms of the addition amount of the phosphazene compound, it is adjusted to 5wt% in Example 2, 8wt% in Example 3, 10wt% in Example 4, and adjusted to 10wt% in Example 5. 15wt%, adjusted to 20wt% in embodiment 6, adjusted to 22wt% in embodiment 7. In addition, the thickness ratio W6 / W2 was adjusted to 0.125 in Example 2, 0.200 in Example 3, 0.250 in Example 4, 0.375 in Example 5, and 0.375 in Example 6. Adjusted to 0.500, adjusted to 0.550 in Example 7. Since the thickness of the positive electrode mixture layer W2 is set to 80 μm, the thickness of the flame retard...
Embodiment 8
[0055] As shown in Table 1, in Example 8, in addition to the phosphazene compound (manufactured by Bridgestone Corporation, trade name Phoslyte (registered trademark), liquid form) in which a flame retardant was added to the non-aqueous electrolytic solution, It carried out similarly to Example 2, and obtained the lithium ion secondary battery 20. The addition amount of the phosphazene compound in the non-aqueous electrolytic solution was adjusted to 8 vol%.
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