Ningde Amperex Technology Limited

Pengwei Chen

Meng Wang

Leimin Xu

Liang Wang

Kai Wang

Tao Li

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

The present application relates to a cathode material and an electrochemical device comprising the same. In particular, the present application relates to a cathode material having a surface heterophasic structure, wherein the cathode material includes a lithium cobalt oxide and an oxide of cobalt, wherein a Raman spectrum of the cathode material has characteristic peaks in the range of about 470 cmto about 530 cm, about 560 cmto about 630 cmand about 650 cmto about 750 cm, and wherein the surface heterophasic structure of the cathode material includes the lithium cobalt oxide and the oxide of cobalt. The electrochemical device using the cathode material having a surface heterophasic structure of the present application can exhibit excellent cycle performance and thermal stability.

Cathode material and electrochemical device comprising the same

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

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.

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Ningde, China

Pengwei Chen