Abstract: A method for preparing a positive electrode material and related products are disclosed. The method includes mixing a lithium source with a phosphoric acid solution to form a first mixture; combining the first mixture with manganese hydrogen phosphate, an iron source, and optionally a source of an M element to form a second mixture; and drying and sintering the second mixture to obtain a lithium manganese iron phosphate (LMFP) positive electrode material. The M element is selected from transition metals other than manganese and iron, Group IIA metals, Group IIIA metals, Group IVA metals, and Group VIIA elements. The resulting LMFP material exhibits reduced gas and by-product generation, increased compacted density, lowered resistivity, and improved specific capacity and rate performance, making it suitable for positive electrode plates, batteries, and electric apparatuses.

Abstract: A precursor material, a method for preparing the precursor material, a positive electrode material, a method for preparing the positive electrode material, a positive electrode plate, a battery, and an electric apparatus. The precursor material includes a compound MnxFeyM(1-x-y)HPO4·nH2O, where 0.9?x+y<1, 0<x?0.9, 0<y?0.9, 0?n?6, and M includes one or more of transition metal elements other than manganese and iron, Group IIA metal elements, Group IIIA metal elements, and Group IVA metal elements. The precursor material has a uniform distribution of elements and good batch consistency, and a prepared positive electrode material has a uniform distribution of elements and good batch consistency, improving the specific capacity and cycling performance of a battery.

Abstract: A positive electrode active material includes a core and a shell enveloping the core. The core contains Li1+xMn1?yAyP1?zRzO4, where A is one or more selected from Zn, Al, Na, K, Mg, Mo, W, Ti, V, Zr, Fe, Ni, Co, Ga, Sn, Sb, Nb, and Ge, and R is one or more selected from B, Si, N, and S. The shell includes a first coating layer and a second coating layer. The first coating layer includes a pyrophosphate MP2O7 and a phosphate XPO4, where M and X each are one or more independently selected from Li, Fe, Ni, Mg, Co, Cu, Zn, Ti, Ag, Zr, Nb, and Al. The second coating layer is a doped carbon layer, where a doping element in the doped carbon layer includes any one or more selected from nitrogen, phosphorus, sulfur, boron, and fluorine.

Abstract: A positive electrode sheet, a secondary battery, a battery module, a battery pack and an electrical apparatus are described. The positive electrode sheet includes a positive electrode current collector and a positive electrode film layer arranged on at least one surface of the positive electrode current collector and having a single-layer or multi-layer structure. When the positive electrode film layer is of the single-layer structure, at least one positive electrode film layer comprises both a first positive electrode active material and a second positive electrode active material with a chemical formula of LiaAxMn1-yRyP1-zCzO4-nDn; and/or, when the positive electrode film layer is of the multi-layer structure, at least one layer of the at least one positive electrode film layer includes both a first and second positive electrode active material. The secondary battery made of the positive electrode sheet has high energy density and high battery cell rate performance.

Abstract: A positive electrode active material, a preparation method thereof, a positive electrode plate, a battery, and an electric device are provided. The positive electrode active material includes a core and a coating layer. The core includes a sodium-ion transition metal oxide containing the iron element and/or nickel element. In the sodium-ion transition metal oxide, a molar amount of the iron element is denoted as b, a molar amount of the nickel is denoted as c, 0?b?0.4, and 0?c?0.4. The coating layer is disposed on at least a portion of a surface of the core, the coating layer contains an alkaline sodium compound, and based on a total mass of the positive electrode active material, a mass proportion of the alkaline sodium compound is w %, which satisfies: 0 . 1 ? ( b + c ) / w ? 0 . 5 .

Abstract: Disclosed are devices, systems, and methods of manufacture and use of modular functionalized cellular nanoparticles that can bind a wide range of ligands, payloads, and functional substances onto a nanoparticle surface. In various embodiments, a cell membrane coating on the nanoparticle is engineered to express a membrane anchor that can readily form a covalent bond with any functional moiety modified with an appropriate peptide tag sequence.

Abstract: Provided are a positive electrode active material and a preparation method thereof, a positive electrode plate, a secondary battery, a battery module, a battery pack, and an electric apparatus. The positive electrode active material includes a core containing LimAxMn1-yByP1-zCzO4-nDn, a first coating layer enveloping the core and containing a crystalline pyrophosphate LiaMP2O7 and/or Mb(P2O7)c, a second coating layer enveloping the first coating layer and containing an oxide M?dOe, and a third coating layer enveloping the second coating layer and containing carbon. The positive electrode active material of this application can reduce Li/Mn anti-site defects produced, reduce dissolving-out amount of manganese, lower the lattice change rate, increase the capacity of the secondary battery, and improve the cycling performance, high-temperature storage performance, and safety performance of the secondary battery.

Abstract: A positive electrode sheet, a secondary battery, a battery module, a battery pack and an electrical apparatus are described. The positive electrode sheet includes a positive electrode current collector and a positive electrode film layer arranged on at least one surface of the positive electrode current collector and having a single-layer or multi-layer structure. When the positive electrode film layer is of the single-layer structure, at least one positive electrode film layer comprises both a first positive electrode active material and a second positive electrode active material with a chemical formula of LiaAxMn1-yRyP1-zCzO4-nDn; and/or, when the positive electrode film layer is of the multi-layer structure, at least one layer of the at least one positive electrode film layer includes both a first and second positive electrode active material. The secondary battery made of the positive electrode sheet has high energy density and high battery cell rate performance.

Abstract: An aspect of the present description relates to compounds useful for improving pre-mRNA splicing in a cell. In particular, another aspect of the present description relates to substituted heteroaryl compounds, forms, and pharmaceutical compositions thereof and methods of use for treating or ameliorating spinocerebellar ataxia type 3 (SCA3), also known as Machado-Joseph disease (MJD).

Abstract: The present application provides a positive electrode active material and a preparation method thereof and a battery comprising same, and an electrical device. The positive electrode active material comprises a core and a first area formed on at least part of the surface of the core; the first area comprises a V element, and the mass concentration of the V element in the first area is denoted as W1; the core comprises a V element, and the mass concentration of the V element in the core is denoted as W2, then W1>W2.

Abstract: 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 M1; the matrix particle is doped with element M2 and element M3, element M2 in the matrix particle is uniformly distributed, and element M3 in the matrix particle has a decreasing concentration from the exterior surface to a core of the matrix particle; and element M1 and element M3 are each independently selected from one or more of Mg, Al, Ca, Ba, Ti, Zr, Zn, and B, and element M2 includes one or more of Si, Ti, Cr, Mo, V, Ge, Se, Zr, Nb, Ru, Rh, Pd, Sb, Te, Ce, and W.

Abstract: 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 M1; the matrix particle is doped with element M2 and element M3, element M2 in the matrix particle is uniformly distributed, and element M3 in the matrix particle has a decreasing concentration from the exterior surface to a core of the matrix particle; and element M1 and element M3 are each independently selected from one or more of Mg, Al, Ca, Ba, Ti, Zr, Zn, and B, and element M2 includes one or more of Si, Ti, Cr, Mo, V, Ge, Se, Zr, Nb, Ru, Rh, Pd, Sb, Te, Ce, and W.

Abstract: 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 M1; the matrix particle is doped with element M2 and element M3, element M2 in the matrix particle is uniformly distributed, and element M3 in the matrix particle has a decreasing concentration from the exterior surface to a core of the matrix particle; and element M1 and element M3 are each independently selected from one or more of Mg, Al, Ca, Ba, Ti, Zr, Zn, and B, and element M2 includes one or more of Si, Ti, Cr, Mo, V, Ge, Se, Zr, Nb, Ru, Rh, Pd, Sb, Te, Ce, and W.

Abstract: 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 M1, and the coating layer includes an oxide of element M2. When the positive electrode active material is in a 11% delithiated state, average valences of element M1 and M2 are ?1 and ?1, respectively; when the positive electrode active material is in a 78% delithiated state, average valences of element M1 and M2 are ?2 and ?2, respectively; and ?2>?1, ?1=?2. Element M1 includes one or more of Si, Ti, Cr, Mo, V, Se, Nb, Ru, Rh, Pd, Sb, Te, Ce, and W, and element M2 is selected from one or more of Mg, Al, Ca, Zr, Zn, Y, and B.

Abstract: A sound collecting system includes a first electronic device, a left-ear TWS earphone, and a right-ear TWS earphone. Microphones of the first electronic device, the left-ear TWS earphone, and the right-ear TWS earphone form a first microphone array. When the first electronic device detects a user operation of starting video recording, the first microphone array performs sound collecting to obtain a joint microphone array signal. The first electronic device performs noise reduction processing on the joint microphone array signal.

Abstract: A positive electrode active material and a preparation method therefor, a positive electrode sheet, a battery and an electric device. The positive electrode active material comprises: a core; and a carbon coating layer which covers at least part of the surface of the core, the molar ratio of sp3 hybridized carbon atoms to sp2 hybridized carbon atoms in the carbon coating layer being not less than 0.5.

Abstract: 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 ?amax?3.00% in an a-axis direction, and a maximum swelling rate satisfying ?cmax?3.02% in a c-axis direction.

Abstract: Provided are a gene sequencing method, apparatus and device, and a medium. The method includes: acquiring a gene sample to be detected and a preset read length; determining a sample type of each sample included in the gene sample; sequencing, for each sample in the gene sample, each short sequence of the sample based on a sequencing sequence corresponding to the sample type of the sample, until the gene sequence in each short sequence of the sample is sequenced to the preset read length, to obtain intermediate stage sequencing result data of each short sequence in the sample; and sending the intermediate stage sequencing result data of each short sequence in each sample to a target server, enabling the target server to perform data analysis on the intermediate stage sequencing result data of each short sequence in each sample, to obtain an intermediate stage detection report.

Abstract: 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 M1; the matrix particle is doped with element M2 and element M3, element M2 in the matrix particle is uniformly distributed, and element M3 in the matrix particle has a decreasing concentration from the exterior surface to a core of the matrix particle; and element M1 and element M3 are each independently selected from one or more of Mg, Al, Ca, Ba, Ti, Zr, Zn, and B, and element M2 includes one or more of Si, Ti, Cr, Mo, V, Ge, Se, Zr, Nb, Ru, Rh, Pd, Sb, Te, Ce, and W.

Abstract: This application provides a positive electrode active material, a method for preparing a positive electrode active material, a positive electrode plate, a secondary battery, a battery module, a battery pack, and an electric apparatus. The positive electrode active material includes a first positive electrode active material and a second positive electrode active material. The first positive electrode active material includes a compound LiNibCodMneM?fO2, and the second positive electrode active material includes a core, a first coating layer enveloping the core, and a second coating layer enveloping the first coating layer, where the core includes a compound Li1+xMn1?yAyP1?zRzO4, the first coating layer includes pyrophosphate MaP2O7 and phosphate XnPO4, and the second coating layer includes carbon.