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Sodium ion secondary battery, layered manganese-containing oxide active substance and anode active substance used in sodium ion secondary battery, and preparation method of layered manganese-containing oxide active substance

A technology of active material and manganese oxide, which is applied in the field of layered manganese oxide active material, can solve the problems of poor rate performance, unstable cycle, unstable positive electrode material, etc., and achieve high capacity density, good safety performance, structural stable effect

Inactive Publication Date: 2014-06-04
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new layered doped manganese oxide active material and its preparation method, which can overcome the shortcomings of the current sodium ion secondary battery, such as unstable anode material, unstable cycle, poor rate performance, etc.

Method used

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  • Sodium ion secondary battery, layered manganese-containing oxide active substance and anode active substance used in sodium ion secondary battery, and preparation method of layered manganese-containing oxide active substance
  • Sodium ion secondary battery, layered manganese-containing oxide active substance and anode active substance used in sodium ion secondary battery, and preparation method of layered manganese-containing oxide active substance
  • Sodium ion secondary battery, layered manganese-containing oxide active substance and anode active substance used in sodium ion secondary battery, and preparation method of layered manganese-containing oxide active substance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This example is used to illustrate the preparation and application of the positive electrode active material of the present invention.

[0033] The present embodiment adopts solid-phase method to prepare active material, and concrete steps are: Na 2 CO 3 (analytical pure), Li 2 CO 3 (analytical pure) and Mn 2 o 3 Mix according to the stoichiometric ratio, mix and grind in an agate mortar for half an hour to obtain the precursor, which is pressed into tablets and transferred to Al 2 o 3 In the crucible, it is processed at 1000 degrees Celsius in a muffle furnace for 24 hours, and the resulting black powder sheet is ground for later use, which is the active substance Na 0.4736 Li 0.03 mn 0.97 o 2 , its XRD pattern is shown in figure 1 ; image 3 is the SEM image of the substance.

[0034] The above active material is used as the positive electrode material to prepare a sodium ion battery. The specific steps are: the prepared active substance Na 0.4736 Li 0....

Embodiment 2

[0036] This example is used to illustrate the preparation and application of the positive electrode active material of the present invention.

[0037] The present embodiment adopts solid-phase method to prepare active material, and concrete steps are: Na 2 CO 3 (analytical pure), Li 2 CO 3 (analytical pure) and Mn 2 o 3 Mix according to the stoichiometric ratio, mix and grind in an agate mortar for half an hour to obtain the precursor, which is pressed into tablets and transferred to Al 2 o 3 In the crucible, it is processed in a muffle furnace at 1200 degrees Celsius for 24 hours, and the resulting black powder sheet is ground for later use, which is the active substance Na 0.535 Li 0.1228 mn 0.8772 o 2 , its XRD pattern is shown in figure 2 ;

[0038] The above active material is used as the positive electrode material to prepare a sodium ion battery. The specific steps are: the prepared active substance Na 0.535 Li 0.1228 mn 0.8772 o 2 The powder is mixed w...

Embodiment 3

[0040] This example is used to illustrate the preparation and application of the positive electrode active material of the present invention.

[0041] The present embodiment adopts solid-phase method to prepare active material, and concrete steps are: Na 2 CO 3 (analytical pure), Al 2 o 3 with Mn 2 o 3 Mix according to the stoichiometric ratio, mix and grind in an agate mortar for half an hour to obtain the precursor, which is pressed into tablets and transferred to Al 2 o 3 In the crucible, it is processed in a muffle furnace at 1200 degrees Celsius for 24 hours, and the resulting black powder sheet is ground for later use, which is the active substance Na 0.767 al 0.1667 mn 0.8333 o 2 , its XRD pattern is shown in figure 2 .

[0042] The above active material is used as the positive electrode material to prepare a sodium ion battery. The specific steps are: the prepared active substance Na 0.767 al 0.1667 mn 0.8333 o 2 The powder is mixed with acetylene blac...

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Abstract

The invention provides a sodium ion secondary battery, and a layered manganese-containing oxide active substance and an anode active substance used in the sodium ion secondary battery; the chemical general formula of the anode active substance is Na[x]A[y]Mn[1-y]O[2], wherein A is one or more selected from a group including Li, Mg, Cu, Zn, Al, V and Fe; x is more than 0.4 and less than 0.9, y is more than 0.05 and less than 0.5, delta is more than minus 0.1 and less than 0.1. Average working voltage of the anode active substance of the sodium ion secondary battery disclosed by the invention in the sodium ion secondary battery is 2.6-3.8V; furthermore, a novel anode material of layered doped manganese oxide disclosed by the invention is good in safety performance, low in cost and good in cycling stability.

Description

technical field [0001] The invention provides a sodium ion secondary battery and its layered manganese-containing oxide active material, positive electrode and preparation method of the active material. Background technique [0002] Since the concept of the rocking chair secondary battery was proposed in the 1970s, lithium-ion batteries and sodium-ion batteries have attracted the attention of many people due to their small size, high energy density, and high voltage. Since Sony successfully commercialized lithium-ion batteries in the 1990s, the development of electrode materials for sodium-ion batteries has gradually cooled down, and more and more attention has been paid to lithium-ion batteries. Lithium-ion batteries have been widely used in people's lives, and have been used in small household appliances. To high energy density, high power application equipment, such as electric vehicles, national grid, etc. However, with the gradual consumption of limited lithium resourc...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M10/054H01M4/131
CPCY02E60/122H01M4/131H01M4/505H01M10/054Y02E60/10
Inventor 胡勇胜王跃生徐淑银刘品李泓陈立泉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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