Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology (hong Kong) Limited

Ningde Amperex Technology Limited

Contemporary Amperex Technology Limited

Jinhua He

Qi Wu

Yao Jiang

Chunhua Hu

Shushi Dou

Bin Deng

Jiaxin An

Changyin Ji

Xinxin Zhang

Wenguang Lin

Liangbin Liu

Kun Wang

Xuan Chen

Xiangrong Chen

Wei Gao

Qiang Li

Fen Tao

Zhengde Zhang

Jinhui Chen

Kelun Wang

Tao Qiao

Yuhao Wang

Zibin Liang

A layered-oxide positive electrode active material may have a molecular formula of NaMnFeNiMNOQ, where a doping element M is selected from at least one of Cu, Li, Ti, Zr, K, Sb, Nb, Mg, Ca, Mo, Zn, Cr, W, Bi, Sn, Ge, or Al, a doping element N is selected from at least one of Si, P, B, S, or Se, a doping element Q is selected from at least one of F, Cl, or N, 0.66≤x≤1, 0<a≤0.70, 0<b≤0.70, 0<c≤0.23, 0≤d<0.30, 0≤e≤0.30, 0≤f≤0.30, 0≤δ≤0.30, a+b+c+d+e=1, 0<e+f≤0.30, 0<(e+f)/a≤0.30, 0.20≤d+e+f≤0.30, and (b+c)/a≤1.5.

Layered-oxide positive electrode active material and positive electrode plate, sodium-ion battery, and electric apparatus containing same

This application discloses a positive electrode active material, including bulk particles and a coating layer applied on an exterior surface of each of the bulk particles, where the bulk particle includes a lithium composite oxide that contains element nickel and a doping element M, and the coating layer includes an oxide of element M. When the positive electrode active material is in a 11% delithiated state, average valences of element Mand Mare αand β, respectively; when the positive electrode active material is in a 78% delithiated state, average valences of element Mand Mare αand β, respectively; and α>α, β=β. Element Mincludes one or more of Si, Ti, Cr, Mo, V, Se, Nb, Ru, Rh, Pd, Sb, Te, Ce, and W, and element Mis selected from one or more of Mg, Al, Ca, Zr, Zn, Y, and B.

Positive electrode active material and preparation method thereof, positive electrode plate, lithium-ion secondary battery, and apparatus containing such lithium-ion secondary battery

A positive electrode active material and a preparation method thereof, a positive electrode plate, a lithium-ion secondary battery, and a battery module, a battery pack, and apparatus containing the lithium-ion secondary battery are provided. The positive electrode active material includes secondary particles formed by agglomeration of primary particles, where the primary particles include a layered nickel-containing lithium composite oxide, and the nickel-containing lithium composite oxide includes a doping element; and when the positive electrode active material is charged from an 11% delithiated state to a 78% delithiated state at a rate of 0.1 C, a lattice of the primary particles has a maximum shrinkage rate satisfying Δa≤3.00% in an a-axis direction, and a maximum swelling rate satisfying Δc≤3.02% in a c-axis direction.

Positive electrode active material and preparation method thereof, positive electrode plate, lithium-ion secondary battery, and battery module, battery pack, and apparatus containing such lithium-ion secondary battery

A positive electrode active material and a preparation method thereof, a positive electrode plate, a lithium-ion secondary battery, and a battery module, battery pack, and apparatus containing such lithium-ion secondary battery are provided. The positive electrode active material includes matrix particles and a coating layer covering an exterior surface of the matrix particle, where the matrix particle includes a lithium nickel cobalt manganese oxide, and the coating layer includes an oxide of element M; the matrix particle is doped with element Mand element M, element Min the matrix particle is uniformly distributed, and element Min the matrix particle has a decreasing concentration from the exterior surface to a core of the matrix particle; and element Mand element Mare each independently selected from one or more of Mg, Al, Ca, Ba, Ti, Zr, Zn, and B, and element Mincludes one or more of Si, Ti, Cr, Mo, V, Ge, Se, Zr, Nb, Ru, Rh, Pd, Sb, Te, Ce, and W.

This application discloses a positive electrode active material, including secondary particles and a coating layer applied on an exterior surface of each of the secondary particles, where the secondary particle includes a lithium transition metal oxide that contains a doping element M, the coating layer includes an oxide of element M, Mis selected from one or more of Si, Ti, Cr, Mo, V, Ge, Se, Zr, Nb, Ru, Rh, Pd, Sb, Te, Ce, and W, and Mis selected from one or more of Mg, Al, Ca, Ce, Ti, Zr, Zn, Y, and B; a relative deviation of local mass concentration of element Min the secondary particle is less than 20%; and the secondary particle from the core to the exterior surface of the particle includes a plurality of layers of primary particles arranged along radial direction of the secondary particle.

The present application discloses a positive electrode active material including a lithium nickel cobalt manganese oxide, the molar content of nickel in the lithium nickel cobalt manganese oxide accounts for 60%-90% of the total molar content of nickel, cobalt and manganese, and the lithium nickel cobalt manganese oxide has a layered crystal structure of a space group Rm; a transition metal layer of the lithium nickel cobalt manganese oxide includes a doping element, and the local mass concentration of the doping element in particles of the positive electrode active material has a relative deviation of 20% or less; and in a differential scanning calorimetry spectrum of the positive electrode active material in a 78% delithiation state, an initial exothermic temperature of a main exothermic peak is 200&#xb0; C. or more, and an integral area of the main exothermic peak is 100 J/g or less.

Positive electrode active material, method for preparation thereof, positive electrode plate, lithium-ion secondary battery and related battery module, battery pack and apparatus

This application provides a positive active material and a preparation method thereof, an electrochemical battery, a battery module, a battery pack, and an apparatus. The positive active material includes an inner core and a coating layer, where the coating layer coats a surface of the inner core. The inner core is selected from a ternary material with a molecular formula of Li[NiCoMnMM']OY, where distribution of each of the doping elements M, M&#x2032;, and Y in the inner core meets the following condition: there is a reduced mass concentration gradient from an outer side of the inner core to a center of the inner core. The positive active material herein features high gram capacity, high structural stability, and high thermal stability, so that the electrochemical battery has excellent cycle performance and storage performance and high initial discharge gram capacity.

Positive active material and preparation method thereof, electrochemical battery, battery module, battery pack, and apparatus

The present application discloses a battery to alleviate the impact on the main body of the battery and for improving the safety performance of the battery. The battery comprises a package case and a circuit board, wherein the package case forms a first surface and a buffer member is arranged between the circuit board and the first surface. In the present application, the buffer member between the circuit board and the first surface may alleviate the force received on the first surface, thereby alleviating the impact on the electrode assembly of the battery, avoiding the damage of the positive and negative electrode plates and the short circuit caused by the contact between the positive and negative electrodes, and improving the safety of battery.

Battery

The present application discloses positive electrode active material, preparation method thereof, positive electrode plate, lithium-ion secondary battery and battery module, pack, and apparatus. The positive electrode active material includes a nickel-containing lithium composite oxide satisfying a chemical formula Li[NiCoMnM]O, in the formula, M is a doping element at transition metal site, 0.5&#x2264;x&#x3c;1, 0&#x2264;y&#x3c;0.3, 0&#x2264;z&#x3c;0.3, &#x2212;0.1&#x2264;a&#x3c;0.2, 0&#x3c;b&#x3c;0.3, x+y+z+b=1, wherein the positive electrode active material has a layered crystal structure and belongs to space group Rm; under the condition that the positive electrode active material is in 78% delithiation state, at least part of the doping elements M have a chemical valence of +3 or more, and surface oxygen of the positive electrode active material has an average valence state of Vsatisfying &#x2212;2.0&#x2264;V&#x2264;&#x2212;1.5.

Positive electrode active material, preparation method thereof, positive electrode plate, lithium-ion secondary battery as well as battery module, battery pack and apparatus containing lithium-ion secondary battery

The present disclosure relates to a ternary positive electrode material and a battery using the ternary positive electrode material. The ternary positive electrode material includes secondary particles composed of primary particles. The secondary particles have an average particle diameter D50 of 6 &#x3bc;m-20 &#x3bc;m, BET of 0.2 m/g-1 m/g, and the number &#x3c3; of primary particles per unit area of the secondary particles is 5 particles/&#x3bc;m-100 particles/&#x3bc;m. The ternary positive electrode material has a formula of Li[NiCoMnM1M2]ON, where element M1 and element M2 are each independently selected from at least one of Al, Zr, Ti, Mg, Zn, B, Ca, Ce, Te and Fe, element N is selected from at least one of F, Cl and S, and 0&#x3c;x&#x3c;1, 0&#x3c;y&#x2264;0.3, 0&#x2264;z&#x2264;0.3, &#x2212;0.1&#x3c;a&#x3c;0.2, 0&#x2264;b&#x3c;0.3, 0&#x2264;c&#x3c;0.3, 0&#x2264;d&#x3c;0.2, 0&#x2264;b+c&#x2264;0.3, x+y+z+b=1. The formed secondary particles have high compactness, thereby effectively improving the structural stability and the cycling performance at high or low temperature.

Ternary positive electrode material, and lithium ion battery

The present disclosure relates to a cell, a battery and an electronic device. The cell includes a first electrode sheet and a second electrode sheet. The first electrode sheet includes a first current collector. The second electrode sheet includes a second current collector. The second current collector includes a starting section and a first bending segment connected to the starting section. A current collector opposite to the starting section and the first bending segment is configured as the second current collector. Thus, the cell is not internally provided with an opposite region between the first current collector and the second current collector, which may enhance the energy density of the cell and improve the safety of the cell.

Cell, battery and electronic device

The present application provides a battery and an electronic device thereof. The battery comprises: a electrode assembly having at least one separator protrusion; a package bag for accommodating the electrode assembly; and a buffer layer arranged between the electrode assembly and the package bag; wherein the buffer layer is further arranged on the at least one separator protrusion. The purpose of the present application is to provide a battery and an electronic device thereof which are capable of improving the drop resistance performance of the battery and improving the safety performance of its use.

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Ningde, China

Jinhua He