Ningde Amperex Technology Limited

Leimin Xu

Meng Wang

Liang Wang

Pengwei Chen

Molin Zhou

Fei Zhang

Jianming Zheng

Ye Lang

Gang Peng

Wenyuan Liu

Kai Wang

Feng Gu

Na Liu

Wei Wang

Xin Jiang

Chunfeng Zheng

Hui Liu

Qunfeng Wang

Jianli Gai

A positive electrode material, an electrochemical device that uses same, and an electronic device. Specifically, a positive is a layered structure. The layered structure includes a strip-like structure containing an atom cluster. The positive electrode material according to this application helps to improve cycle performance and storage performance of the electrochemical device under a high voltage working condition.

Positive electrode material, electrochemical device that uses same, and electronic device

A cathode material includes a plurality of first particles. Each first particle includes a secondary particle composed of a plurality of third particles, and the first particle includes a first lithium-containing transition metal oxide; and a plurality of second particles. The second particle includes a fourth particle and/or a secondary particle composed of a plurality of fourth particles, and the second particle includes a second lithium-containing transition metal oxide. The electrochemical device including the cathode material is significantly improved in the aspects of energy density, capacity attenuation and service life.

Cathode material, and electrochemical device including the same

A solid electrolyte material having a general chemical formula of LiMM'S, where M is at least one of Al, Ga or In, M′ is at least one of Si or Ge, and 0<x≤0.5. The solid electrolyte material according to the application is simple in composition, contains no phosphorus sensitive to water, and has good Li+ conductivity at the same time.

Phosphorus-free sulfide solid electrolyte

A positive electrode material includes a lithium composite oxide, and the positive electrode material comprises stress relief particles. There are cavities inside the stress relief particles, and the cavities are closed structures. The positive electrode material that includes the stress relief particles can be used to effectively tackle a stress and relieve the stress in advance, relieve a strain of the positive electrode material used at a high voltage, avoid ruptures of particles of the positive electrode material, and enhance structural stability of the positive electrode material. The positive electrode material and the electrochemical device having the positive electrode material achieve good high-voltage cycle performance and cycle stability.

Positive electrode material, electrochemical device containing same, electronic device, and method for preparing the positive electrode material

A cathode material includes: a plurality of first particles. Each first particle includes a secondary particle composed of a plurality of third particles, and the first particle includes a first lithium-containing transition metal oxide; and a plurality of second particles. The second particle includes a fourth particle and/or a secondary particle composed of a plurality of fourth particles, and the second particle includes a second lithium-containing transition metal oxide. The electrochemical device including the cathode material is significantly improved in the aspects of energy density, capacity attenuation and service life.

A cathode includes a current collector, a first material layer and a second material layer. The first material layer includes a first material. The second material layer includes a second material. The second material includes at least one of the followings compounds: phosphate represented by a general formula M1POand lithium titanium phosphate represented by a general formula LiTiM2(PO), and the second material layer is disposed between the current collector and the first material layer. The cathode of the present application is provided with a double-layer structure including at least one of phosphate and lithium titanium phosphate to avoid direct contact between the current collector in the cathode and an anode material layer and optimize the stability of the first material layer, so that the cycle performance, electrochemical stability and safety performance of the electrochemical device are significantly improved.

Cathode, electrochemical device and electronic device including same

Embodiments of the present application relate to a solid electrolyte and a preparation method thereof, and an electrochemical device and an electronic device comprising the solid electrolyte. The solid electrolyte comprises a lithium-containing transition metal sulfide being represented by the chemical formula of LiCdMGeS, where M is selected from the group consisting of Al, Ga, In, Si, Sn and a combination thereof, wherein 0&#x3c;a&#x2264;0.25, 0&#x2264;b&#x2264;0.2, 0&#x2264;c&#x2264;0.2, and 0&#x2264;d&#x2264;0.2. The embodiments of the present application effectively improve the shortcomings of poor chemical stability of the conventional thiophosphate solid electrolyte in an atmospheric environment by providing the above solid electrolyte having a thio-LISICON structure and containing no phosphorus (P), so that the solid electrolyte has both good chemical stability and high ionic conductivity, thereby reducing the processing environment requirements and manufacturing cost of the solid electrolyte.

Solid electrolyte and preparation method thereof, and electrochemical device and electronic device comprising solid electrolyte

This application relates to a metal oxide and a method for preparing the same. Specifically, CoOis selected as a precursor of lithium cobalt oxide, and one or more metal elements M are doped in the particles of CoOto obtain a doped lithium cobalt oxide precursor CoMO, where 0&#x3c;x&#x2264;0.3. The difference value, measured by a spectrometer of a scanning electron microscope, of the weight percentage of one of M in two identical area regions is E, wherein 0&#x3c;E&#x2264;1% (wt. %). A lithium ion battery with lithium cobalt oxide prepared from the precursor as a cathode material shows great cycle stability, high-temperature energy storage performance and safety performance in a high-voltage (equal to or greater than 4.45 V) charging and discharging environment.

Metal oxide and method for preparing the same

Embodiments of the present application relate to a solid electrolyte and a preparation method thereof, and an electrochemical device and an electronic device comprising the same. The solid electrolyte of the present application includes a solid electrolyte material being represented by the chemical formula of LiMGaPS, where M is selected from the group consisting of Sr, Ba, Zn, Cd and a combination thereof, 0&#x2264;x&#x2264;0.2 and 0&#x2264;y&#x2264;0.05. Embodiments of the present application provides a solid electrolyte having good stability with lithium and ionic conductivity by forming the solid electrolyte using lower cost solid electrolyte materials and optimizing the material composition and a crystal structure thereof. At the same time, this also reduces the manufacturing costs of the solid electrolyte, and improves the structural stability of the solid electrolyte.

Solid electrolyte and preparation method thereof, and electrochemical device and electronic device comprising same

The present disclosure provides a cathode material, a method for preparing the same, a cathode and lithium ion battery having the same. The cathode material includes an active component; and a sodium salt dispersed in the active component.

Cathode material having an active component and a sodium salt dispersed in the active component, method for preparing the same, cathode and lithium ion battery

The present application relates to a metal oxide and synthesis of a lithium ion battery. Specifically, the present application selects a cobalt oxide compound, which uses CoOas a main body, as a precursor of lithium cobalt oxide, and anion doping is performed in particles of CoOto obtain a doped precursor for lithium cobalt oxide. The general formula of the precursor can be expressed as Co(OM), where about 0&#x3c;y&#x3c;about 0.2, and wherein the anion M comprises at least one of F, P, S, Cl, N, As, Se, Br, Te, I or At. The lithium ion battery with a cathode made of lithium cobalt oxide material prepared by using the precursor presents good cycle stability in a high voltage charge-discharge environment.

Metal oxide and synthesis of lithium ion battery

The examples of the present application provide a positive electrode material and a lithium ion battery. The positive electrode material comprises: a substrate material; and a coating material formed on at least one portion of the surface of the substrate material; the general formula of the substrate material being LiCoMOor LiNiCoNO, wherein 0&#x2264;x&#x3c;0.1, 0&#x2264;y&#x3c;0.1 and M is at least one of selected from the group of Mn, Ni, Al, Mg, Ti, Zr, Y, P, Cr; &#x2153;&#x2264;a&#x2264;0.82, 0.1&#x2264;b&#x2264;&#x2153;, 0.6&#x2264;a+b, N is at least one of selected from the group of Mn, Al, Mg, Ti, Zr, La, Ce, Y; the coating material includes CeZrO, wherein 0&#x2264;z&#x3c;0.1. By using a positive electrode material coated with CeZrO, the direct current (DC) resistance of the lithium ion battery is greatly reduced.

Positive electrode material and lithium ion battery

The examples of the present application provide a positive electrode material and a lithium-ion battery. The positive electrode material comprises: a substrate material; and a coating material formed on at least one part of a surface of the substrate material; the general formula of the substrate material being LiCoMO, wherein 1.0&#x2264;x&#x2264;1.2, 0.8&#x2264;y&#x2264;1.0 and M is at least one selected from the group consisting of Mg, Ti, Al, Zr, Ni, Mn; the coating material includes YOand at least two selected from the group consisting of LaO, ZrOand CeO. The examples of the present application enable the battery prepared by the provided positive electrode material to have a lower storage expansion ratio, a higher capacity retention ratio, and improved cycle performance at a high charge cutoff voltage by the interaction of at least three kinds of oxides.

Positive electrode material and lithium-ion battery

The present invention relates to the field of the Li-ion battery and, particularly, relates to a cathode material for the Li-ion battery, a method for preparing the same and a Li-ion battery containing the same. A surface of the cathode material of spinel type lithium-manganese-nickel-containing composite oxide of the present invention is coated with a complex coating layer composed of a first coating layer containing LiLaZrOand a second coating layer containing LiNbO. The method includes: firstly coating the first coating layer containing LiLaZrOon the surface of spinel type lithium-manganese-nickel-containing composite oxide in a solid phase method; and then coating the second coating layer containing LiNbOin a hydro-thermal method. The cathode material of the present invention improves cycle stability and rate performance of spinel type lithium-manganese-nickel-containing composite oxide, and meanwhile reduces dissolution and erosion effect of the electrolyte on the cathode material during charging or discharging.

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Ningde, China

Leimin Xu