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Lithium supplement agent and preparation method and application thereof

A lithium supplement and lithium source technology, applied in chemical instruments and methods, inorganic chemistry, nickel compounds, etc., can solve the problems of unstable lithium supplements and inability to effectively provide lithium ions, etc., to increase particle size and improve stability Sex, reduce the effect of residual alkali

Pending Publication Date: 2022-01-07
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of unstable lithium supplements in the prior art and unable to effectively provide lithium ions, thereby providing a lithium supplement and its preparation method and application

Method used

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  • Lithium supplement agent and preparation method and application thereof
  • Lithium supplement agent and preparation method and application thereof
  • Lithium supplement agent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The present embodiment provides a complement to lithium, and specific preparation method:

[0028] (1) in a dry environment, lithium hydroxide and a nickel-containing compound (NiO) in a molar ratio of Li / Ni element is uniformly mixed 2.0;

[0029] (2) The mixed material was placed in a box furnace for calcination, particularly as the calcining operation: temperature increasing rate of 4 ℃ / min heating to 300 ℃, heat 8h, and then, again at a heating rate of 2 ℃ / min of heated to 600 ℃, incubated 12h; calcination of the protective gas is argon flow rate of 10L / min;

[0030] (3) After the sample was naturally cooled after calcination, the complement to give a lithium binder material.

Embodiment 2

[0032] The present embodiment provides a complement to lithium, and specific preparation method:

[0033] (1) in a dry environment, lithium hydroxide and a nickel-containing compound (NiO) in a molar ratio of Li / Ni 2.5 elements mixed;

[0034] (2) The mixed material was placed in a box furnace for calcination, particularly as the calcining operation: a ramp rate of 2 ℃ / min heating to 600 ℃, heat 3h, then again at a temperature rise rate of 4 ℃ / min of temperature was raised to 800 deg.] C, incubated 7H; calcination of the protective gas is argon flow rate of 10L / min;

[0035] (3) After the sample was naturally cooled after calcination, the complement to give a lithium binder material.

Embodiment 3

[0037] The present embodiment provides a complement to lithium, and specific preparation method:

[0038] (1) in a dry environment, lithium hydroxide and a nickel-containing compound (nickel hydroxide) in a molar ratio of Li / Ni element is uniformly mixed 2.1;

[0039](2) The mixed material was placed in a box furnace for calcination, calcining operation is specifically: the heating rate 3 ℃ / min heating to 500 ℃, heat 5h, then, again at a heating rate of 3 ℃ / min of temperature was raised to 700 deg.] C, incubated 10H; calcination of the protective gas is argon flow rate of 10L / min;

[0040] (3) After the sample was naturally cooled after calcination, the complement to give a lithium binder material.

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Abstract

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a lithium supplement agent and a preparation method and application thereof. According to the preparation method, a segmented calcination mode is utilized, lithium hydroxide is decomposed into lithium oxide at a relatively low temperature, meanwhile, the lithium oxide can be combined with a nickel source in the decomposition process, and then the material is placed in a high-temperature environment to be continuously calcined, so that the required material is obtained. The method has the advantages that the requirement for mixing equipment is reduced, atmosphere protection is not needed, and the segmented calcination process is utilized, so that the particle size of the material can be effectively improved, the activity of the material is effectively reduced, and the material can exist in the air more stably. Meanwhile, residual alkali on the surface of the material is reduced due to long reaction time. A charge-discharge test on the material shows that the material has relatively high charge capacity and relatively low discharge capacity; and the material is relatively poor in lithium ion accepting capacity, can effectively provide lithium ions for a positive electrode material, and is suitable for being used as a lithium supplement additive.

Description

Technical field [0001] The present invention belongs to the technical field of lithium ion batteries, particularly lithium agent and its complement, to a preparation method and application. Background technique [0002] With the increasingly prominent energy issues such as environmental pollution, development and utilization of new energy sources is imperative. In the coming years, demand for lithium ion battery applications in the new energy automotive industry will continue to increase. In the new energy vehicles, lithium-ion batteries occupy a central position in lithium-ion battery cathode material is the top priority. [0003] Lithium-ion battery charging and discharging process, especially during the first week of charging and discharging, since the SEI film is formed, the material will result in part of the lithium is confined in the negative electrode material, resulting in the presence of a low first efficiency, low capacity problem. Given these problems, complement Lith...

Claims

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Application Information

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IPC IPC(8): C01G53/00H01M4/13H01M10/0525H01M10/42
CPCC01G53/42H01M10/0525H01M10/4235H01M4/13C01P2004/62C01P2006/80C01P2006/40Y02E60/10
Inventor 陈思贤江卫军郑晓醒许鑫培
Owner SVOLT ENERGY TECHNOLOGY CO LTD
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