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Modified lithium nickel manganese oxide positive electrode composite material and preparation method, lithium ion battery

A technology of lithium nickel manganate and composite materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor cycle performance, low rate performance, rapid capacity decay, etc., to suppress the reaction and improve the charge-discharge specific capacity. , the effect of enhancing conductivity

Active Publication Date: 2019-11-12
深圳市集创云天新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high voltage situation, LiNi 0.5 mn 1.5 o 4 It is prone to defects such as poor cycle performance, fast capacity fading, and low rate performance. It is necessary to optimize LiNi 0.5 mn 1.5 o 4 Modified
However, at this stage by LiNi 0.5 mn 1.5 o 4 From the perspective of nanostructure, anion and cation doping and simple coating treatment, the LiNi can not be effectively improved. 0.5 mn 1.5 o 4 The charge-discharge specific capacity and effective inhibition of LiNi 0.5 mn 1.5 o 4 Side reactions between modified lithium nickel manganese oxide cathode composite material and electrolyte

Method used

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  • Modified lithium nickel manganese oxide positive electrode composite material and preparation method, lithium ion battery
  • Modified lithium nickel manganese oxide positive electrode composite material and preparation method, lithium ion battery
  • Modified lithium nickel manganese oxide positive electrode composite material and preparation method, lithium ion battery

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Embodiment Construction

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below, obviously, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0036] In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention.

[0037] The present invention provides a modified positive electrode composite material of lithium nickel manganese oxide. ...

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Abstract

The invention provides a modified lithium nickel manganese oxide positive pole composite material. The modified lithium nickel manganese oxide positive pole composite material comprises lithium nickel manganese oxide particles, ferric fluoride layers coated on the surfaces of the lithium nickel manganese oxide particles and graphene layers coated on the ferric fluoride layers. The modified lithium nickel manganese oxide positive pole composite material provided by the invention has relatively high charging and discharging specific capacity, and has better cycle performance. The invention also provides a preparation method of the modified lithium nickel manganese oxide positive pole composite material and a lithium ion battery using the modified lithium nickel manganese oxide positive pole composite material.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a modified lithium nickel manganese oxide cathode composite material and a preparation method thereof, and a lithium ion battery using the modified lithium nickel manganese oxide cathode composite material. Background technique [0002] Lithium-ion batteries are widely used in portable electronic devices such as mobile communication tools, cameras, and notebook computers due to their high energy density, no memory effect, wide operating temperature range, and no pollution to the environment. In the field of lithium-ion batteries, the modified lithium nickel manganese oxide cathode composite material has always been the focus of research, among which, the modified lithium nickel manganese oxide cathode composite material with a spinel structure lithium nickel manganese oxide (LiNi 0.5 mn 1.5 o 4 ), which has attracted much attention due to its high energy density. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525
CPCH01M4/366H01M4/505H01M4/525H01M4/625H01M4/628H01M10/0525Y02E60/10
Inventor 李军赖桂棠杨帆
Owner 深圳市集创云天新材料有限公司
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