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Perovskite material, method of preparing same, and secondary battery including perovskite material
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A perovskite material and electron volt technology, applied in the direction of fuel cell half-cells and secondary battery-type half-cells, battery electrodes, chemical instruments and methods, can solve the charging and discharging of negative electrodes and lithium-air batteries Problems such as characteristic deterioration and deterioration
Pending Publication Date: 2020-04-21
SAMSUNG ELECTRONICS CO LTD
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However, carbonaceous materials and organic electrolytes can be replaced by lithium oxides (Li 2 o 2 ) decomposes (the lithium oxide is a reaction product generated during discharge of a lithium-air battery), thereby generating carbon dioxide, which can cause deterioration of the positive electrode
Carbon dioxide can also be transferred to the negative electrode through the organic electrolyte and subsequently react with lithium in the negative electrode, thereby causing deterioration of the charge and discharge characteristics of the negative electrode and lithium-air batteries
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Embodiment 1
[0137] Embodiment 1: perovskite material (Li 0.34 La 0.55 RuO 3-δ )(0≤δ≤1) preparation
[0138] Will Li 2 CO 3 , La 2 o 3 and RuO 2 powder to provide Li 0.34 La 0.55 RuO 3-δ A stoichiometric amount of the composition (where 0≤δ≤1) was added to ethanol, followed by mixing. The resulting mixture was then placed in a ball mill mixer and pulverized and mixed for about 4 hours. The resulting mixture was dried and then heated to about 800° C. at a heating rate of about 5° C. / minute, followed by continuous first heat treatment at the same temperature in an air atmosphere for about 4 hours.
[0139] The resulting heated mixture obtained after the first heat treatment was pulverized into a powder (primary particle) having a particle size of about 0.3 μm. The powder was then compressed to form cylindrical tablets having a diameter of about 1.3 centimeters (cm), a height of about 0.5 cm, and a weight of about 0.3 grams (g). The sheet was then subjected to a second heat treat...
Embodiment 2
[0140] Embodiment 2: perovskite material (Li 0.34 La 0.55 NiO 3-δ )(0≤δ≤1) preparation
[0141] The target product was obtained in the same manner as in Example 1, except as follows: using Ni(OH) 2 instead of RuO 2 . The target product is Li 0.34 La 0.55 NiO 3-δ , where δ=0 and / or 0<δ≦1.
Embodiment 3
[0142] Embodiment 3: perovskite material (Li 0.34 La 0.55 MnO 3-δ )(0≤δ≤1) preparation
[0143] The target product was obtained in the same manner as in Example 1, except as follows: using MnO 2 instead of RuO 2 . The target product is Li 0.34 La 0.55 MnO 3-δ , where δ=0 and / or 0<δ≦1.
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Abstract
The invention relates to a perovskite material, a method of preparing the same, and a secondary battery including the perovskite material. The perovskite material is represented by a formula 1; wherein in the formula 1, 0<x<=1, 0<y<=1, 0<x+y<1, 0<z<=1.5, 0<=delta<=1, A is one or a combination of H, Na, K, Rb, Cs, Ca, Sr, Ba, Y, La, Ce, Pr, Nd, Pm, Sm, Gd, Tb, Dy, Ho, and Er; and M is one or a combination of Ni, Pd, Pb, Fe, Ir, Co, Rh, Mn, Cr, Ru, Re, Sn, V, Ge, W, Zr, Mo, Hf, U, Nb, Th, Ta, Bi, Li, H, Na, K, Rb, Cs, Ca, Sr, Ba, Y, La, Ce, Pr, Nd, Pm, Sm, Gd, Tb, Dy, Ho, Er, Mg, Al, Si, Sc, Zn,Ga, Ag, Cd, In, Sb, Pt, and Au, and the formula 1 is Li<x>A<y>M<z>O<3-delta>.
Description
[0001] Cross References to Related Applications [0002] This application claims priority and benefit from, and arises from, U.S. Provisional Application No. 62 / 744,614, filed October 11, 2018, and Korean Patent Application No. 10-2018-0122041, filed October 12, 2018 in all rights and interests, the contents of which are incorporated herein by reference in their entirety. technical field [0003] The present disclosure relates to a perovskite material, a method of preparing the perovskite material, and a secondary battery including the perovskite material. Background technique [0004] A metal-air battery may include, for example, a positive electrode at which oxygen present in air is reduced, a negative electrode at which lithium is oxidized, and an electrolyte interposed between the positive electrode and the negative electrode. The metal-air battery may be a lithium-air battery including a lithium thin film as a negative electrode. Lithium-air batteries can act as high-...
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