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Sodium-ion battery positive electrode material as well as preparation method and application thereof

A sodium-ion battery and cathode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of low energy density of sodium-ion batteries, reduce transportation and storage costs, maintain capacity, and improve air stability Effect

Pending Publication Date: 2022-08-02
溧阳中科海钠科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention provides a positive electrode material for a sodium ion battery and its preparation method and application, which solves the problem of low energy density of the sodium ion battery

Method used

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  • Sodium-ion battery positive electrode material as well as preparation method and application thereof
  • Sodium-ion battery positive electrode material as well as preparation method and application thereof
  • Sodium-ion battery positive electrode material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Weigh 2.39kg Na 2 CO 3 , 3.25g Ti(SO 4 ) 2 , 0.54kg Ni(OH) 2 , (5.43kg+5g) CuO (5g is used to prepare the coating layer), 0.76kg Fe 2 O 3 and 0.87kg MnO 2 After mixing and dispersing evenly, it is Na 1.0 Cu 0.15 Ni 0.2 Fe 0.3 Mn 0.33 O 2 / (CuO+Ti(SO 4 ) 2 ) mixed with the precursors, and sintered at 930 °C for 15 h (the heating rate was 3 °C / min) to obtain Na-ion battery cathode material Na 1.0 Cu 0.15 Ni 0.2 Fe 0.3 Mn 0.33 O 2 / [CuO+Ti(SO 4 ) 2 ], denoted as B1.

Embodiment 2

[0050] Weigh 2.29kg Na 2 CO 3 , 2.77gAl 2 SiO 5 , 0.016kg Li 2 CO 3 , (0.10kg+5g)WO 3 (5g used to prepare the coating), 0.95kg CuO, 0.84kg Fe 2 O 3 and 0.79kg MnO 2 After mixing and dispersing evenly, it is Na 0.96 Li 0.01 Cu 0.33 Fe 0.33 W 0.01 Mn 0.3 O 2 / (WO 3 +Al 2 SiO 5 ) mixed with the precursors, and sintered at 920 °C for 20 h (the heating rate was 2 °C / min) to obtain Na-ion battery cathode material Na 0.96 Li 0.01 Cu 0.33 Fe 0.33 W 0.01 Mn 0.3 O 2 / (WO 3 +Al 2 SiO 5 ), denoted as B2.

Embodiment 3

[0052] Weigh 2.23kgNa 2 CO 3 , 4.61g Zr (NO 3 ) 4 , (0.11kg+5g)WO 3 (5g is used to prepare the coating layer), 0.45kg CuO, 0.50kg Ni(OH) 2 , 0.79kg Fe 2 O 3 and 0.93kg MnO 2 After mixing and dispersing evenly, it is Na 0.9 Cu 0.15 Ni 0.18 Fe 0.3 W 0.01 Mn 0.34 O 2 / [WO 3 +Zr(NO 3 ) 4 ] Mixed the precursors and sintered at 1000 °C for 16 h (the heating rate was 5 °C / min) to obtain Na-ion battery cathode material Na 0.9 Cu 0.15 Ni 0.18 Fe 0.3 W 0.01 Mn 0.34 O 2 / [WO 3 +Zr(NO 3 ) 4 ], denoted as B3.

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Abstract

The invention belongs to the technical field of battery materials, and particularly discloses a sodium ion battery positive electrode material and a preparation method and application thereof. The chemical formula of the sodium ion battery positive electrode material is NaxCuyFezMnaMbO2 + delta / (ZcOs + YrXOt), and the structure of the sodium ion battery positive electrode material is a ZcOs + YrXOt surface modified layered structure. The sodium ion battery positive electrode material disclosed by the invention can be obtained by carrying out one-step or multi-step mixing on various raw materials and then carrying out high-temperature sintering. The preparation method is simple, and all-around uniform coating is easy to form; and the prepared sodium ion battery positive electrode material is high in air stability, excellent in rate capability and stable in capacity.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to a positive electrode material for a sodium ion battery and a preparation method and application thereof. Background technique [0002] In the context of "dual carbon", it is particularly important to develop new energy storage batteries such as lithium-ion batteries and sodium-ion batteries in a healthy and orderly manner. However, the energy density of sodium-ion batteries is relatively low. Although the layered oxide cathode material has a high theoretical capacity, increasing the charge cut-off voltage will bring about problems such as metal dissolution and electrolyte decomposition, which will affect the cycle life of the material. Make the necessary coating modifications. [0003] Existing coating modification methods are mostly based on precursors, which are prone to the problem of uneven coating, while doping from raw materials is mainly on the precursor side, a...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M10/054
CPCH01M4/505H01M10/054Y02E60/10
Inventor 程斯琪王建鑫陈森岑杰王伟刚戚兴国唐堃
Owner 溧阳中科海钠科技有限责任公司
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