摘要:
A lithium mixed metal oxide containing Li, Mn and M (M represents at least one metal element, and is free from Li or Mn) , and having a peak around 1.5 Å (peak A), a peak around 2.5 Å (peak B), and the value of I B /I A is not less than 0.15 and not more than 0.9 in a radial distribution function obtained by subjecting an extended X-ray absorption fine structure (EXAFS) spectrum at K absorption edge of Mn in the oxide to the Fourier transformation, wherein I A is the intensity of peak A and I B is the intensity of peak B.
摘要:
A lithium secondary battery using lithium manganese oxide as an positive active material and excellent for charge and discharge cycle property. As an positive active material of lithium secondary battery, lithium manganese oxide having a cubic spinel structure, in which the strength ratio (P 2 /P 1 strength ratio) of the primary endothermal peak (P 1 ) appearing around 950°C and the secondary endothermal peak (P 2 ) appearing around 1100°C in differential thermal analysis is under 1, is used.
摘要:
The invention discloses a lithium rechargeable positive electrode for electrochemical generator containing an electrochemically active material of general formula: Lix My Am Dz Ot with: 0,8 ≤ x ≤ 1.2; 0
摘要:
A cathode material for a lithium ion secondary battery, especially of the non-aqueous solvent type, comprises a compound of the formula
Li 1-X-a A X Ni 1-Y-b B Y O₂.
wherein: A is at least one alkaline earth metal component and may be selected. from (1) at least two of magnesium, calcium, strontium and barium, (2) strontium alone and (3) barium alone; B is at least one transition metal element other than Ni; X is the total number of moles of A and if A consists of more than one alkaline earth metal element, then X is the total number of moles of all alkaline earth metal elements; Y is the total number of moles of B and if B consists of more than one transition metal element, then Y is the total number of moles of all transition metal elements; and X, Y, a and b satisfy the respective equations: 0 0 -0.10 ≦ a ≦ 0.10 -0.15 ≦ b ≦ 0. 15. A method of preparing the cathode material comprises the steps of: mixing a starting compound containing lithium and A with a starting compound containing nickel and B; heating the mixture in an oxidizing atmosphere.
摘要:
A method of producing an inorganic material (S10) according to the present invention includes a vitrification step (S12) of applying shearing stress and compressive stress to a mixed powder (MP) of a plurality of kinds of inorganic compound powders by using a ring ball mill mechanism (70) to vitrify at least a part of the mixed powder (MP) ; and a dispersion step (S13) of dispersing the vitrified mixed powder (MP) after the vitrification step (S12), where a combined step of the vitrification step (S12) and the dispersion step (S13) is performed a plurality of times to obtain a vitrified inorganic material powder from the mixed powder.
摘要:
The present invention relates to a positive electrode active material and a lithium secondary battery including the same, and more particularly, to a bimodal-type positive electrode active material for improving the low energy density per unit volume of an overlithiated lithium manganese-based oxide and a lithium secondary battery including the same.
摘要:
The present invention provides a method for producing a positive electrode active material for lithium ion battery, having excellent tap density, at excellent production efficiency, and a positive electrode active material for lithium ion battery. The method for producing a positive electrode active material for lithium ion battery including a step of conducting a main firing after increasing mass percent of all metals in lithium-containing carbonate by 1% to 105% compared to the mass percent of all metals before a preliminary firing, by conducting the step of a preliminary firing to the lithium-containing carbonate, which is a precursor for positive electrode active material for lithium ion battery, with a rotary kiln.
摘要:
Disclosed are a transition metal precursor for preparation of a lithium composite transition metal oxide, the transition metal precursor including a composite transition metal compound represented by Formula 1 below and a hydrocarbon compound, and a method of preparing the same:
Mn a M b (OH 1-x ) 2 (1)
wherein M is at least two selected from the group consisting of Ni, Co, Mn, Al, Cu, Fe, Mg, B, Cr, and second period transition metals; 0.4≤a≤1; 0≤b≤0.6; a+b≤1; and 0 The transition metal precursor includes a particular composite transition metal compound and a hydrocarbon compound, and thus, when a lithium composite transition metal oxide is prepared using the same, carbon may be present in lithium transition metal oxide particles and/or on surfaces thereof, whereby a secondary battery including the lithium composite transition metal oxide exhibits excellent rate characteristics and long lifespan.
摘要:
The invention relates to inorganic particles having the particular property of being spontaneously individualised, both in the dry state in the form of a powder and when they are dispersed in a matrix. The invention also relates to a method for producing said particles, and to the materials produced by including said particles in matrices.