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Controllable regulation and control method of Na2/3Mn1/2Fe1/4Co1/4O2 positive electrode material of sodium-ion battery meeting high-rate discharge cycle performance

A sodium-ion battery, high-rate discharge technology, applied to battery electrodes, positive electrodes, secondary batteries, etc., can solve the problems of slow heating rate and long reaction time, and achieve fast reaction speed, high specific capacity and low cost Effect

Active Publication Date: 2020-11-13
苏州聚云新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional sintering method mainly relies on heat radiation or heat convection, and heats the target reactant layer by layer from the surface to the inside or from top to bottom, which has the disadvantages of slow heating rate and long reaction time.

Method used

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  • Controllable regulation and control method of Na2/3Mn1/2Fe1/4Co1/4O2 positive electrode material of sodium-ion battery meeting high-rate discharge cycle performance
  • Controllable regulation and control method of Na2/3Mn1/2Fe1/4Co1/4O2 positive electrode material of sodium-ion battery meeting high-rate discharge cycle performance
  • Controllable regulation and control method of Na2/3Mn1/2Fe1/4Co1/4O2 positive electrode material of sodium-ion battery meeting high-rate discharge cycle performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: The pressure is 10Mpa, 1100 ℃ microwave radiation solid-phase reaction for 6 hours, the preparation of Na 2 / 3 mn 1 / 2 Fe 1 / 4 co 1 / 4 o 2 Cathode material

[0020] First, at room temperature, according to Na 2 / 3 mn 1 / 2 Fe 1 / 4 co 1 / 4 o 2 The stoichiometric ratio Na: Mn: Fe: Co=2 / 3: 1 / 2: 1 / 4: 1 / 4, accurately weigh analytically pure sodium carbonate (molecular formula is Na 2 CO 3 ), manganese trioxide (molecular formula is Mn 2 o 3 ), ferric oxide (molecular formula is Fe 2 o 3 ) and cobalt carbonate (molecular formula is CoCO 3 ) high-purity powder, the total material quality is 20.0000g, and the above four kinds of reaction raw material powders are transferred to a planetary ball mill tank with a volume of 200ml; the grinding ball is and 304 material stainless steel ball, and The weight ratio is 2:1; the total weight ratio of grinding balls to materials is 10:1; and add 50mL of analytical pure ethanol, cover the ball mill jar tightly and ...

Embodiment 2

[0021] Example 2: The pressure is 20MPa, 1000 ℃ microwave radiation solid phase reaction for 10 hours, the preparation of Na 2 / 3 mn 1 / 2 Fe 1 / 4 co 1 / 4 o 2 Cathode material

[0022] First, at room temperature, according to Na 2 / 3 mn 1 / 2 Fe 1 / 4 co 1 / 4 o 2 The stoichiometric ratio Na: Mn: Fe: Co=2 / 3: 1 / 2: 1 / 4: 1 / 4, accurately weigh analytically pure sodium carbonate (molecular formula is Na 2 CO 3 ), manganese trioxide (molecular formula is Mn 2 o 3 ), ferric oxide (molecular formula is Fe 2 o 3 ) and cobalt carbonate (molecular formula is CoCO 3 ) high-purity powder, the total material quality is 20.0000g, and the above four kinds of reaction raw material powders are transferred to a planetary ball mill tank with a volume of 200ml; the grinding ball is and 304 material stainless steel ball, and The weight ratio of the grinding ball to the material is 10:1; add 40mL of analytical pure ethanol, cover the ball mill jar tightly and put it into the ball mill. 1...

Embodiment 3

[0023] Example 3: The pressure is 15MPa, 1050 ℃ microwave radiation solid phase reaction for 8 hours, the preparation of Na 2 / 3 mn 1 / 2 Fe 1 / 4 co 1 / 4 o 2 Cathode material

[0024] First, at room temperature, according to Na 2 / 3 mn 1 / 2 Fe 1 / 4 co 1 / 4 o 2 The stoichiometric ratio Na: Mn: Fe: Co=2 / 3: 1 / 2: 1 / 4: 1 / 4, accurately weigh analytically pure sodium carbonate (molecular formula is Na 2 CO 3 ), manganese trioxide (molecular formula is Mn 2 o 3 ), ferric oxide (molecular formula is Fe 2 o 3 ) and cobalt carbonate (molecular formula is CoCO 3 ) high-purity powder, the total material quality is 20.0000g, and the above four kinds of reaction raw material powders are transferred to a planetary ball mill tank with a volume of 200ml; the grinding ball is and 304 material stainless steel ball, and The weight ratio is 2:1; the total weight ratio of grinding balls to materials is 10:1; and add 50mL of analytical pure ethanol, cover the ball mill jar tightly and ...

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Abstract

The invention relates to a controllable regulation and control method of a Na2 / 3Mn1 / 2Fe1 / 4Co1 / 4O2 positive electrode material of a sodium-ion battery meeting high-rate discharge cycle performance. Themethod comprises the steps of taking sodium carbonate (with a molecular formula of Na2CO3), manganese sesquioxide (with a molecular formula of Mn2O3), ferric oxide (with a molecular formula of Fe2O3)and cobalt carbonate (with a molecular formula of CoCO3) as raw materials, weighing according to a stoichiometric ratio, and fully mixing to prepare a precursor compact sheet; synthesizing the Na2 / 3Mn1 / 2Fe1 / 4Co1 / 4O2 positive electrode material of the sodium ion battery by adopting a microwave sintering technology. The technical route has the characteristics of simple process, high reaction speed,controllable product morphology, low cost and the like, and is suitable for rapid controllable preparation of sodium ion battery positive electrode materials and related materials; the synthesized pure-phase Na2 / 3Mn1 / 2Fe1 / 4Co1 / 4O2 material has high specific capacity, good cycling stability and high rate capability, and provides a valuable basis for improving the comprehensive electrochemical performance of the sodium ion battery.

Description

technical field [0001] The invention belongs to the field of synthesis and application of sodium ion battery materials, in particular to a sodium ion battery Na 2 / 3 mn 1 / 2 Fe 1 / 4 co 1 / 4 o 2 A controllable regulation method for cathode materials. [0002] technical background [0003] With the continuous destruction of the natural ecological environment and the increasing depletion of non-renewable resources, how to efficiently utilize renewable resources such as tidal energy, solar energy, and biomass energy and develop new energy storage systems has become very urgent. Lithium-ion batteries are widely used due to their advantages such as high specific capacity, no memory effect, and long life; however, the limited reserves of lithium resources, uneven geographical distribution, and the increasing demand for lithium-ion batteries in social development have led to lithium-ion The rising price of batteries has largely hindered the development of lithium-ion batteries in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/505H01M4/525H01M10/054
CPCH01M4/625H01M4/505H01M4/525H01M10/054H01M2004/028H01M2004/021Y02E60/10
Inventor 孙嬿李春生付俊龙王莉娜金奕吴海涛
Owner 苏州聚云新能源科技有限公司
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