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Lithium ion battery cathode material preparation method and product and application of lithium ion battery cathode material

A lithium-ion battery and cathode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of low decomposition temperature of PBs, crowding out Li ion active sites, affecting high-rate discharge characteristics and capacity of battery materials, etc. The effect of achieving high capacity and rate performance

Inactive Publication Date: 2019-08-16
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existence of crystal water vacancies will crowd out the active sites of Li ions, reduce the integrity of the lattice, and cause severe carrier scattering.
This will seriously affect the high rate discharge characteristics and capacity of the battery material
[0003] The decomposition temperature of PBs is low, and the process of removing crystal water may cause crystal decomposition, which has certain limitations, and a new method needs to be proposed

Method used

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  • Lithium ion battery cathode material preparation method and product and application of lithium ion battery cathode material
  • Lithium ion battery cathode material preparation method and product and application of lithium ion battery cathode material
  • Lithium ion battery cathode material preparation method and product and application of lithium ion battery cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of positive electrode material of lithium ion battery, the positive electrode material of lithium ion battery is Fe III Fe II (CN) 5 , to prepare Fe by co-precipitation method in non-aqueous system III Fe II (CN) 5 , and Fe III Fe II (CN) 5 does not contain water of crystallization, the specific steps are:

[0024] (1) 0.04molFeCl 3 Dissolve in 100ml ethanol, stir magnetically for 10min;

[0025] (2) Add 0.03mol Na 4 Fe(CN) 6 Grind, pass through a 150-mesh sieve, dissolve in 100ml ethanol, and stir magnetically for 60 minutes;

[0026] (3) Mix the above two solutions, and magnetically stir for 60 minutes at 50°C;

[0027] (4) Centrifuge the above reactants, wash them with ethanol for 4-5 times, put them in an oven at 80°C for 3 hours, and obtain the final product.

[0028] figure 1 For instance Fe III Fe II (CN) 5 The finished product drawing of the material, figure 2 For instance Fe III Fe II (CN) 5 SEM images of the material and image 3 ...

Embodiment 2

[0030] A lithium ion battery positive electrode material, prepared according to the following specific steps:

[0031] (1) Add 0.02molFe 2 (SO 4 ) 3 Dissolve in 100ml ethanol, stir magnetically for 10min;

[0032] (2) Add 0.03mol Na 4 Fe(CN) 6 Grind, pass through a 150-mesh sieve, dissolve in 100ml ethanol, and stir magnetically for 60 minutes;

[0033] (3) Mix the above two solutions, and stir magnetically at 50°C for 60 minutes; centrifuge the above reactant, wash with ethanol 4 to 5 times, and dry in an oven at 80°C for 3 hours to obtain the final product.

Embodiment 3

[0035] A lithium ion battery positive electrode material, prepared according to the following specific steps:

[0036] (1) Add 0.04molFe(NO 3 ) 3 Dissolve in 100ml ethanol, stir magnetically for 10min;

[0037] (2) Grind 0.03mol Na4Fe(CN)6, pass through a 150-mesh sieve, dissolve in 100ml ethanol, and stir magnetically for 60 minutes;

[0038] (3) Mix the above two solutions, and stir magnetically at 50°C for 60 minutes; centrifuge the above reactant, wash with ethanol 4 to 5 times, and dry in an oven at 80°C for 3 hours to obtain the final product.

[0039] From image 3 It can be seen that the specific data are as follows:

[0040] Table 1

[0041] .

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Abstract

The invention provides a preparation method of a lithium ion battery cathode material Fe<III>Fe<II>(CN)5 and a product and an application of the lithium ion battery cathode material. The Fe<III>Fe<II>(CN)5 is prepared through a non-aqueous system coprecipitation method; and since the Fe<III>Fe<II>(CN)5 contains no crystal water, capacity and rate capability of a lithium ion battery with the obtained material being as the cathode material can be improved effectively. In electron energy spectrum (EDS), the content of oxygen in the material is measured to be 0, which indicates that the material does not contain H2O. The preparation process is relatively simple and easy to operate.

Description

technical field [0001] The present invention designs a kind of lithium-ion battery cathode material Fe III Fe II (CN) 5 The preparation method and its products and applications. Background technique [0002] As a new energy source, lithium-ion batteries are widely used in civilian and military fields. In order to meet various needs, such as drones and electric vehicle batteries need to have high rate performance, it is necessary to develop related battery materials. PBs is considered to be a very potential high-rate lithium-ion battery cathode material, and the industry has proposed a theoretical discharge rate of 50C. The preparation process of the cathode active material PBs has a great influence on the performance of the whole battery. Usually, PBs are produced in water systems such as co-precipitation method and hydrothermal method, and there will be a large amount of crystal water in the crystal lattice. The existence of crystal water vacancies will crowd out the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525H01M4/58H01M10/0525
CPCH01M4/525H01M4/58H01M10/0525Y02E60/10
Inventor 何丹农邓秉浩张芳卢玉英张道明王亚坤阳靖峰解启飞焦靖华严一楠王惠亚赵立敏
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH