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Doped modified P2 sodium ion type sodium ion battery positive electrode material

A technology for sodium-ion batteries and cathode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as cycle life decline and structural instability, and achieve high specific capacity, wide application range, and good cycle and rate performance. Effect

Active Publication Date: 2019-07-02
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention is aimed at Na 0.67 mn x Fe 1-x o 2 Due to the problem of cycle life decline caused by structural instability and the ginger-Taylor effect during the cycle of a series of materials, a Na with a doped structure was invented. 0.67 mn x Fe 1-x o 2 Series of cathode materials

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  • Doped modified P2 sodium ion type sodium ion battery positive electrode material

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Embodiment 1

[0022] A kind of doping modified P2 type sodium ion type sodium ion battery positive electrode material, is the Na of doping structure 0.67 mn x Fe 1- x o 2 Cathode material, material obtained by cation doping Na 0.67 mn 0.6 Fe 0.2 Ni 0.1 Zn 0.1 o 2 .

[0023] Preparation process: Weigh sodium carbonate, manganese carbonate, ferric oxide, nickelous oxide and zinc oxide in proportion to prepare Na 0.67 mn 0.6 Fe 0.2 Ni 0.1 Zn 0.1 o 2 , various raw materials were first sintered at 500°C for 5 hours, and then sintered at 900°C for 15 hours.

Embodiment 2

[0025] A kind of doping modified P2 type sodium ion type sodium ion battery positive electrode material, is the Na of doping structure 0.67 mn x Fe 1- x o 2 Cathode material, material obtained by cation doping Na 0.67 mn 0.6 Fe 0.25 Cu 0.1 Mg 0.05 o 2 .

[0026] Preparation process: Weigh sodium carbonate, manganese carbonate, ferric oxide, copper oxide and calcium oxide in proportion to prepare Na 0.67 mn 0.6 Fe 0.25 Cu 0.1 Mg 0.05 o 2 , various raw materials were first sintered at 500°C for 5 hours, and then sintered at 900°C for 15 hours.

Embodiment 3

[0028] A kind of doping modified P2 type sodium ion type sodium ion battery positive electrode material, is the Na of doping structure 0.67 mn x Fe 1- x o 2 Cathode material, material obtained by cation doping Na 0.67 mn 0.6 Fe 0.3 Cr 0.05 Mg 0.05 o 2 .

[0029] Preparation process: Weigh sodium carbonate, manganese carbonate, ferric oxide, chromium oxide and magnesium oxide in proportion to prepare Na 0.67 mn 0.6 Fe 0.3 Cr 0.05 Mg 0.05 o 2 , various raw materials were first sintered at 500°C for 5 hours, and then sintered at 900°C for 15 hours.

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Abstract

The invention relates to doped modified P2 sodium ion type sodium ion battery positive electrode material, and belongs to the technical field of inorganic new energy materials. The doped modified P2 sodium ion type sodium ion battery positive electrode material is characterized in that the doped modified P2 sodium ion type sodium ion battery positive electrode material is Na0. 67MnxFe1-xO2 positive electrode material of the doped structure and the material Na0. 67Mn0. 6Fe0. 4-x-yAxByO2, 0<x<=0.1, 0<y<=0.1 obtained by positive ion doping . The doped positive ions include two parts: A is the metal positive ions participating in the redox reaction in the charge-discharge process, and B is the inert metal positive ions in the charge-discharge process. The material has the advantages of high specific capacity, better cycle and rate performance and wide application range and the like.

Description

technical field [0001] The invention belongs to the technical field of inorganic new energy materials, and in particular relates to a doped and modified P2 type sodium ion type sodium ion battery cathode material. Background technique [0002] In the field of new energy, energy storage is a very important link, because the power generation of new energy such as solar energy, wind energy, and tide is unstable, and if it is directly connected to the grid, it will have a great impact on the grid, so an energy storage unit is needed Perform peak regulation or frequency regulation on new energy power generation. [0003] At present, the fastest growing field of energy storage units is lithium-ion battery energy storage, but with the rise of power and energy storage lithium batteries, the price of lithium resources, an important raw material, has been rising all the way, which is very unfavorable for the development of new energy lithium-ion batteries Therefore, some low-cost bat...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/50H01M4/52H01M4/48H01M10/054
CPCH01M4/362H01M4/48H01M4/50H01M4/52H01M10/054Y02E60/10
Inventor 许寒丁飞宗军刘兴江
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST