Abstract: A modified positive electrode material includes an inner core and a cladding layer. The inner core is a positive electrode material, and the cladding layer includes a polymer electrolyte body and a ferroelectric ceramic material dispersed in the polymer electrolyte body.

Abstract: A positive active material, a secondary battery, a battery module, a battery pack, and an electrical device are disclosed. The positive active material includes a spinel-type lithium-manganese-containing composite oxide with a molecular formula of Li1+xAaMbXcMn2?a?b?c?xO4?t. In the molecular formula: A is a doping element for a manganese site of the spinel-type lithium-manganese-containing composite oxide; M is used for combining with O to form a second phase containing a polyoxyanion, and M includes one or more of B, C, N, Si, P, S, or Cl; X includes one or more of Mg, Al, Si, Ca, Sc, Ti, Cr, Fe, Co, Ni, Cu, Zn, or Zr; and the molecular formula satisfies: ?0.1?x?0.3, 0<a?0.2, 0<b?0.2, 0<c?0.7, and 0?t?0.2.

Abstract: A positive electrode active material and a preparation method thereof, a secondary battery, and an electric apparatus are provided. The positive electrode active material in the present invention includes: a core, where the core is a lithium-containing phosphate; a first coating layer disposed on at least part of surface of the core, where the first coating layer is a carbon coating layer co-doped with titanium and nitrogen; and a second coating layer disposed on at least part of surface of the first coating layer, where the second coating layer includes Li1+xMxTi2?x(PO4)3, where M is at least one element selected from aluminum, lanthanum, indium, zirconium, gallium, and scandium, and 0.2?x?0.8. With use of the positive electrode active material of the present invention, a high discharge capacity, excellent rate performance, and excellent cycling performance can be achieved.

Abstract: A positive electrode material includes a core including a lithium-rich manganese-based positive electrode material, and a coating layer enveloping outer surface of the core and including a composite material of a transition metal oxoacid salt and carbon. The transition metal in the transition metal oxoacid salt is selected from at least one of Ti, Mo, W, V, Ta, Nb or Nd and the composite material has a mesh structure.

Abstract: A secondary battery includes a positive electrode sheet having a positive electrode active material and a non-aqueous electrolyte. The positive electrode active material includes a central core material and a modification layer disposed on a surface of the central core material. The modification layer including an orthophosphate with a molecular formula Aa+x[PO4]3?y, where A denotes one or more of Li, Na, K, Rb, Cs, Mg, Ca, Ba, Ni, Fe, Co, Ti, Al, Cr, V, Nb, and W, 1?a?6, and ax=3y. The non-aqueous electrolyte includes a fluorinated phosphate with a molecular formula Bb+m[PO1+cF3-c]c?n, where B denotes one or more of Li, Na, K, Rb, Cs, Mg, Ca, and Ba, 1?b?2, c denotes 1 or 2, and bm=cn.

Abstract: A modified high-nickel ternary positive electrode material includes an inner core and inner and outer coating layers. The inner core includes a high-nickel ternary positive electrode material matrix, the matrix being doped with M1, M2, and W. M1 is one of Mo, Zr, Ti, Sb, Nb, and Te. M2 is one of Mg, Al, Ca, Zn, and Sr. Chemical formula of the high-nickel ternary positive electrode material matrix is Li1+a[NixCoyMnzM1bM2cWd]O2. 0.65?x<1, 0?y<0.3, 0?z<0.3, 0<a<0.2, 0<b<0.1, 0<c<0.1, 0<d<0.1, x+y+z+b+c+d=1. A surface layer of the inner core is further doped with Co. The inner coating layer is a Co-containing compound. The outer coating layer includes an Al-containing compound and a B-containing compound.

Abstract: A positive electrode material, including a core and a shell layer are provided. In some embodiments, a molecular formula of the core is Li1+aNixCoyMn1-x-yM1zO2, 0.8?x<1.0, 0<y<0.2, 0<a<0.1, 0?z<0.1, and M1 is selected from at least one of Al, Ta, and B; and a molecular formula of the shell layer is Li1+bComA1nNb1-m-nM2cO2, 0.85?m<1.0, 0<n<0.15, 0<b<0.1, 0.001?1-m-n?0.02, 0?c<0.05, and M2 is selected from at least one of W, Mo, Ti, Zr, Y, and Yb.

Abstract: A positive electrode active material and a preparation method thereof, a secondary battery, and an electric apparatus are provided. The positive electrode active material in the present invention includes: a core, where the core is a lithium-containing phosphate; a first coating layer disposed on at least part of surface of the core, where the first coating layer is a carbon coating layer co-doped with titanium and nitrogen; and a second coating layer disposed on at least part of surface of the first coating layer, where the second coating layer includes Li1+xMxTi2?x(PO4)3, where M is at least one element selected from aluminum, lanthanum, indium, zirconium, gallium, and scandium, and 0.2?x?0.8. With use of the positive electrode active material of the present invention, a high discharge capacity, excellent rate performance, and excellent cycling performance can be achieved.

Abstract: A spinel-type nickel-manganese-lithium-containing composite oxide, a preparation method thereof, and a secondary battery and an electric apparatus containing the same are provided. A body material of the spinel-type nickel-manganese-lithium-containing composite oxide is represented by a general formula LixNiyMnzMmO4Qq, and both element P and one or more elements selected from elements Nb, W, and Sb are doped in the body material, where based on mass of the spinel-type nickel-manganese-lithium-containing composite oxide, doping content k of the element P satisfies 0.48 wt %?k?3.05 wt %, doping content g of the one or more elements selected from the elements Nb, W, and Sb satisfies 0.05 wt %?g?0.31 wt %, and 2?k/g?20. The secondary battery provided in this application has good high-temperature storage performance and high-temperature cycling performance.

Abstract: This application provides a positive-electrode active material and a manufacturing method thereof. The positive-electrode active material includes a positive-electrode active material matrix and a coating layer, and the coating layer coats a surface of the positive-electrode active material matrix. The positive-electrode active material matrix is Li1+a[NixCoyMnzMb]O2, where 0 < x < 1, 0 ? y < 0.3, 0 ? z < 0.3, 0 < a < 0.2, 0 < b < 0.2, x + y + z + b = 1, and preferably, 0.8 ? x < 1. The element M is selected from more than one of Mg, Ca, Sb, Ce, Ti, Zr, Al, Zn, and B, and the coating layer contains a cobalt-containing compound, an aluminum-containing compound, and a boron-containing compound.

Abstract: The present application provides a high-nickel ternary positive electrode active material, which comprises a core Li1+a[LixCoyMnzMb]O2, a fast ionic conductor Li?AlXSiYO4 of a first shell layer, an oxide of an element R of a second shell layer, and a transition layer LipRqOw formed between the first shell layer and the second shell layer. In the high-nickel ternary positive electrode active material of the present application, the surface impurity lithium amount is significantly reduced, and by creatively converting the surface impurity lithium into effective components in the fast ionic conductors Li?AlXSiYO4 and LipRqOw which accelerate the intercalation/deintercalation of lithium ions in the core material, the decomposition and gas production of an electrolyte solution caused by the surface impurity lithium is greatly improved, such that a high-nickel ternary lithium-ion battery has high energy density as well as good cycle performance and safety performance.