Stannic oxide-cobalt monooxide composite thin film material, lithium battery and preparation method

A technology of tin dioxide and cobalt oxide is applied in the field of lithium ion batteries, which can solve the problems of tin-based electrode cracks and pulverization, and achieve the effects of maintaining integrity, buffering stress and good electrochemical properties.

Inactive Publication Date: 2017-10-20
QINGDAO UNIV
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Problems solved by technology

[0005] In the embodiment of the present invention, a kind of tin dioxide-cobaltous oxide composite thin film material, lithium battery and preparation method are provided to solve the problem of tin-ba

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  • Stannic oxide-cobalt monooxide composite thin film material, lithium battery and preparation method
  • Stannic oxide-cobalt monooxide composite thin film material, lithium battery and preparation method
  • Stannic oxide-cobalt monooxide composite thin film material, lithium battery and preparation method

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Embodiment Construction

[0035] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0036] In the embodiment of the present invention, in order to improve the cycle stability of the negative electrode in the lithium-ion battery, considerations are made from the composition of the negative electrode material and the structure of the negative electrode material.

[0037] From the perspective of the composition of the ano...

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Abstract

The embodiment of the invention discloses a stannic oxide-cobalt monooxide composite thin film material, a lithium battery and a preparation method. The stannic oxide-cobalt monooxide composite thin film material comprises stannic oxide layers and cobalt monooxide layers, wherein the stannic oxide layers and the cobalt monooxide layers are arranged at intervals; the thickness of the stannic oxide layers or the cobalt monooxide layers is 2nm to 50nm; the total number of the stannic oxide layers or the cobalt monooxide layers is 20 to 100. The stannic oxide-cobalt monooxide composite thin film material prepared by an alternative deposition method has the advantages that when the stannic oxide-cobalt monooxide composite thin film material is used for preparing a cathode of a lithium ion battery, the good electromechanical property is realized; on one hand, the stannic oxide and the cobalt monooxide are alternatively distributed, so that the stress caused by volume change is effectively buffered, the structure integrity is further maintained, and the cycle stability is improved; on the other hand, the metal Co (cobalt) generated in the CoO (cobalt monooxide) energy storage reaction has the function of catalyzing the electrode charging and discharging reaction activity, and the rate performance of the battery is improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a tin dioxide-cobaltous oxide composite thin film material, a lithium battery and a preparation method. Background technique [0002] Lithium-ion battery is a new type of high-efficiency chemical power source, with the advantages of high energy density, long cycle life, high operating voltage, no memory effect, small self-discharge and wide operating temperature range, it is an ideal chemical for various portable electronic products today. The power supply is also the preferred power supply for electric vehicles in the future, with broad application space and economic value. [0003] Lithium-ion batteries usually consist of a positive electrode, a negative electrode, and an electrolyte. When charging a lithium-ion battery, lithium ions are generated on the positive electrode of the battery, and the generated lithium ions move to the negative electrode through the e...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/485H01M4/525H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/366H01M4/485H01M4/525H01M10/0525Y02E60/10
Inventor 李强李山东王霞徐洁赵国霞滕晓玲商显涛董鹏唐湛鸿李晓
Owner QINGDAO UNIV
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