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Preparation method of praseodymium oxide particle modified lithium ion battery positive electrode material

A lithium-ion battery and positive electrode material technology, applied in the field of preparation of lithium-ion battery positive electrode materials, can solve the problems of high energy consumption, little help in commercial practical application, low working voltage range, etc., and achieve the purpose of prolonging the high-voltage cycle life and battery life. Chemical properties, the effect of alleviating the dissolution of transition metals

Pending Publication Date: 2021-09-17
FUJIAN NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these reports also have some shortcomings, such as higher energy consumption, lower operating voltage range, and replica preparation process, especially for commercial practical applications.

Method used

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  • Preparation method of praseodymium oxide particle modified lithium ion battery positive electrode material
  • Preparation method of praseodymium oxide particle modified lithium ion battery positive electrode material
  • Preparation method of praseodymium oxide particle modified lithium ion battery positive electrode material

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Embodiment 1

[0029] A preparation method of a lithium-ion battery cathode material modified by praseodymium oxide particles, comprising the following steps:

[0030] 1) A certain amount of praseodymium nitrate (Pr(NO 3 ) 3 ·6H 2 O) dispersed in deionized water, configured to a concentration of 0.002-0.01mol L -1 Praseodymium nitrate solution;

[0031] 2) Weigh a certain amount of LiCoO 2 Add the positive electrode material into deionized water, stir vigorously, and then ultrasonicate for 40-60min under the condition of ultrasonic power of 500-1000 W, then add the praseodymium nitrate solution prepared in step 1) dropwise, stir vigorously and ultrasonically treat for 40-60min, ultrasonically The power is 500-1000W, and the positive electrode material mixture containing praseodymium nitrate is obtained;

[0032] 3) Add ammonia water (NH 3 ·H 2 0), the pH of the mixed solution is adjusted to PH=11, while vigorously stirring for 4-4.5h;

[0033] 4) The mixed solution is subjected to ce...

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Abstract

The invention discloses a preparation method of a praseodymium oxide particle modified lithium ion battery positive electrode material, and belongs to the technical field of lithium ion battery electrode materials. The method comprises the following steps: dissolving praseodymium nitrate in an aqueous solution containing the lithium ion positive electrode material, then adjusting the pH value of the mixed solution and the cross-linking coupling effect of the solution to enable the praseodymium nitrate to generate praseodymium hydroxide, precipitating the praseodymium hydroxide on the surface of the positive electrode material, and then carrying out centrifugal cleaning and annealing treatment to obtain the praseodymium oxide particle modified lithium ion battery positive electrode material. The invention provides a synthesis strategy for improving the conductivity and the material interface compatibility of the lithium ion battery material and relieving the transition metal dissolution of the active material by using the metal oxide, and the synthesized praseodymium oxide modified LiCoO2 positive electrode material is uniformly dispersed; the scheme is simple and efficient, the high-temperature and high-pressure electrochemical performance of the material can be remarkably improved, and certain guiding significance is achieved for commercial modification production of the positive electrode material.

Description

technical field [0001] The invention belongs to the technical field of preparation of lithium ion battery materials, and in particular relates to a preparation method of a lithium ion battery cathode material modified by praseodymium oxide particles. [0002] technical background [0003] Lithium-ion batteries (LIBs), which have the advantages of high energy density, long service life, low cost, no memory effect, and green friendliness, have been widely used in various energy conversion (such as solar energy) and 3C digital products (such as mobile phones) and New energy electric vehicles. In the era of technology leadership, although lithium-ion batteries are playing an increasingly important role in the field of energy storage, they are often found in artificial intelligence, communication equipment, and VR technology; Requirements such as cycle life are becoming more and more stringent, especially in the automotive sector. Therefore, the pursuit of high energy density ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00C01G53/00C01B25/45C01F17/224C01F17/10H01M4/525H01M4/62H01M10/0525
CPCC01G51/42C01G53/44C01B25/45C01F17/224C01F17/10H01M4/62H01M4/525H01M10/0525C01P2002/72C01P2004/03C01P2004/04C01P2004/80C01P2006/40Y02E60/10
Inventor 李加新黄永聪赵桂英林应斌黄志高
Owner FUJIAN NORMAL UNIV
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