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Sodium-ion battery cathode materials, preparation method of sodium-ion battery cathode materials, and sodium-ion batteries

A sodium-ion battery and positive electrode material technology, which is applied in battery electrodes, electrolyte storage battery manufacturing, secondary batteries, etc., can solve the problem that the specific capacity and cycle stability cannot be improved at the same time

Inactive Publication Date: 2015-09-30
SHANGHAI SINOPOLY JIAHUA BATTERY TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defect that the charge-discharge specific capacity and cycle stability of the positive electrode material of the sodium ion battery in the prior art cannot be improved simultaneously, and provide the positive electrode material A and B of the sodium ion battery, and a preparation method thereof, sodium ion battery

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  • Sodium-ion battery cathode materials, preparation method of sodium-ion battery cathode materials, and sodium-ion batteries
  • Sodium-ion battery cathode materials, preparation method of sodium-ion battery cathode materials, and sodium-ion batteries
  • Sodium-ion battery cathode materials, preparation method of sodium-ion battery cathode materials, and sodium-ion batteries

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Embodiment 1

[0058] 1. Preparation method of cathode material A for sodium ion battery

[0059] (1) Weigh nickel sulfate, ferrous sulfate and manganese sulfate successively, make the molar ratio of nickel atom, iron atom and manganese atom be 0.2:0.5:0.2, take by weighing sodium carbonate, make (n Fe +n Mn+ no Ni ):n Na =1:1.1;

[0060] Using deionized water as a dispersant, the soluble transition metal salt is prepared as a mixed aqueous solution with a concentration of 1mol / L, sodium hydroxide is prepared as a precipitant with a concentration of 5mol / L, and ammonia water is prepared as a complex solution with a concentration of 5mol / L. mixture;

[0061] (2) Add the mixed aqueous solution, precipitating agent and complexing agent into the reaction kettle at the same time and carry out co-precipitation reaction, post-aging for 12 hours, filtering, washing with deionized water twice, and drying at 100°C for 10 hours to obtain the precursor powder ; After uniformly mixing the precursor ...

Embodiment 2

[0067] 1. Preparation method of cathode material A for sodium ion battery

[0068] (1) Weigh nickel nitrate, ferrous sulfate and manganese nitrate in turn, so that the molar ratio of nickel atom, iron atom and manganese atom is 0.25:0.4:0.3, and take sodium acetate so that (n Fe +n Mn+ no Ni ):n Na =1:1.05;

[0069]Using deionized water as a dispersant, the soluble transition metal salt is prepared into a mixed aqueous solution with a concentration of 2 mol / L, sodium hydroxide is prepared into a precipitant with a concentration of 5 mol / L, and ammonia water is prepared into a complex solution with a concentration of 5 mol / L. mixture;

[0070] (2) Put the mixed aqueous solution, precipitating agent and complexing agent into the reaction kettle for co-precipitation reaction, then age for 12 hours, filter, deionize and wash twice, and dry at 100°C for 10 hours to obtain the precursor powder; After mixing the solid powder and sodium acetate evenly, sintering at 950°C for 10 h...

Embodiment 3

[0076] 1. Preparation method of cathode material A for sodium ion battery

[0077] (1) Weigh nickel chloride, ferrous chloride and manganese chloride successively, make the molar ratio of nickel atom, iron atom and manganese atom be 0.3:0.3:0.3, take by weighing sodium carbonate, make (n Fe +n Mn+ no Ni ):n Na =1:1.1;

[0078] Using deionized water as a dispersant, the soluble transition metal salt is prepared into a mixed aqueous solution with a concentration of 1mol / L, sodium hydroxide is prepared into a precipitant with a concentration of 2mol / L, and ammonia water is prepared into a complex solution with a concentration of 2mol / L. mixture;

[0079] (2) Add the mixed aqueous solution, precipitating agent and complexing agent into the reaction kettle to carry out co-precipitation reaction, after aging for 12 hours, filter, wash twice with deionized water, and dry at 100 °C for 10 hours to obtain the precursor powder; After the precursor powder was uniformly mixed with so...

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Abstract

The invention provides sodium-ion battery cathode materials, a preparation method of the sodium-ion battery cathode materials, and sodium-ion batteries. The composition of the cathode material A is Na(Na(x)Fe(1-x-y-z)Ni(y)Mn(z))O2, wherein x is greater than 0 and less than or equal to 0.2, y is greater than 0 and less than 0.4, and z is greater than 0 and less than 0.4. The preparation method comprises the following steps: mixing a precursor and sodium salt, sintering, and cooling. The cathode material B is formed by coating the surface of the cathode material A with a layer of aluminium oxide. The invention further provides the sodium-ion battery A or B, the anode of the sodium-ion battery A or B is correspondingly made of the cathode material A or B. The preparation method for the cathode material A or B is simple in process and easy to be produced in large scale; the cathode materials A and B are good in consistency, have high specific capacity and better rate capability, and give consideration to the charge-discharge cycling stability, so as to improve the electrochemical performance and the energy density of the sodium-ion batteries and facilitate the practical development of the sodium-ion batteries.

Description

technical field [0001] The present invention specifically relates to anode materials A and B of a sodium ion battery, a preparation method thereof, and a sodium ion battery. Background technique [0002] A secondary battery system suitable for large-scale energy storage applications must have the characteristics of extensive resources, low price, environmental friendliness, safety and reliability, while taking into account the requirements of electrochemical performance indicators such as energy density and power density. Therefore, developing an energy storage battery system that can meet these requirements is a major technical challenge in the field of materials and energy. [0003] Although lithium-ion batteries have excellent electrochemical performance, they have high cost and poor safety. Considering the performance, cost, and environment, sodium-ion batteries are green, safe, and cheap, and have great advantages as energy storage applications, which can alleviate the...

Claims

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Application Information

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IPC IPC(8): H01M10/054H01M4/505H01M4/525H01M10/058
CPCH01M4/505H01M4/525H01M10/054H01M10/058Y02E60/10Y02P70/50
Inventor 王红廖小珍马紫峰
Owner SHANGHAI SINOPOLY JIAHUA BATTERY TECH
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