Lithium manganate material for surface treatment and preparation method thereof

A surface treatment, lithium manganate technology, applied in electrical components, battery electrodes, circuits, etc., can solve problems such as the inability of coating elements to form concentration gradients, uneven dispersion of coatings, and failure to achieve coating effects. The effect of improving high temperature cycling performance and high temperature storage performance, improving bulk phase stability and surface stability, and improving compatibility

Active Publication Date: 2013-04-03
BEIJING EASPRING MATERIAL TECH CO LTD
View PDF5 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the patent application CN101038965A, at least one of a layer of boron-lithium composite oxide, cobalt-lithium composite oxide, vanadium-lithium composite oxide or carbon layer is coated on the basis of doped lithium manganate, so that the normal temperature of the lithium manganate material The cycle and hi

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Lithium manganate material for surface treatment and preparation method thereof
  • Lithium manganate material for surface treatment and preparation method thereof
  • Lithium manganate material for surface treatment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A lithium manganate material is a lithium manganate material that is surface-treated on doped and modified lithium manganate. The surface treatment material is glycol titanate chelate.

[0029] A preparation method of lithium manganate material, comprising the steps of:

[0030] (1) Weigh a certain amount of lithium hydroxide, electrolytic manganese dioxide, and calcium carbonate according to the molar ratio of Li:Mn:Ca of 1.15:1.90:0.10, place them in a mixing tank and mix them for 6 hours, and mix the homogeneous materials in Sinter at 850°C for 20 hours, cool naturally to room temperature, crush and sieve to obtain doped and modified lithium manganate.

[0031] (2) In the drying room, the molar ratio of Ti:(Mn+M) is 0.05%, the mass ratio of isopropanol to lithium manganate is 1:1, and the glycol titanate chelate is dissolved in isopropanol , add the lithium manganate material to the solution, and mix well. The homogeneously mixed slurry is spray-dried by means of ...

Embodiment 2

[0040] A lithium manganate material is a lithium manganate material that is surface-treated on doped and modified lithium manganate. The surface treatment material is aluminum acetylacetonate.

[0041]A preparation method of lithium manganate material, comprising the steps of:

[0042] (1) Take by weighing a certain amount of lithium carbonate, manganese acetate, vanadium pentoxide, ammonium sulfide by Li: Mn: V: S molar ratio is 0.95: 1.8: 0.2: 0.05, is placed in mixing tank and mixes for 5 hours, The uniformly mixed material was sintered at 700°C for 18 hours, cooled naturally to room temperature, crushed and sieved to obtain the doped modified lithium manganate.

[0043] (2) In the drying room, according to Ti: (Mn+M) molar ratio is 5%, ethanol and lithium manganate mass ratio is 90: 1, aluminum acetylacetonate is dissolved in ethanol, lithium manganate material is added to the solution, Mix well. The homogeneously mixed slurry is spray-dried in a spray-drying manner, an...

Embodiment 3

[0046] A lithium manganate material is a lithium manganate material that is surface-treated on doped and modified lithium manganate. The surface treatment material is polybutyl titanate.

[0047] A preparation method of lithium manganate material, comprising the steps of:

[0048] (1) Weigh a certain amount of lithium oxalate, manganese sulfate, and zinc fluoride according to the molar ratio of Li:Mn:Zn and F of 1.00:1.95:0.05:0.10, place them in a mixing tank and mix them for 6 hours, and mix the The material was sintered at 1000°C for 11 hours, cooled naturally to room temperature, crushed and sieved to obtain the doped modified lithium manganate.

[0049] (2) In the drying room, according to Ti:(Mn+M) molar ratio is 9%, ethyl acetate and lithium manganate mass ratio is 5:1, polybutyl titanate is dissolved in ethyl acetate, manganic acid Lithium material is added to the solution and mixed well. The uniformly mixed slurry is spray-dried by means of spray drying, and the et...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a lithium manganate material for surface treatment and a preparation method thereof. The lithium manganate material for surface treatment takes doped and modified lithium manganate as a basal body, the basal body is coated by a surface treatment material to form a surface coating layer which is a product of the surface treatment material, a product obtained by partially decomposing the surface treatment material, or a product obtained by completely decomposing the surface treatment material, and the concentration of the surface coating layer is in graded distribution namely gradually reducing from outside to inside; and the general formula of the basal body is LixMn2-yMyO4-zXz, wherein x is more than or equal to 0.95 and less than or equal to 1.15, y is more than or equal to 0 and less than or equal to 0.2, z is more than or equal to 0 and less than or equal to 0.4, M is one or more of Li, Cr, Co, Ni, Mg, Ca, Sr, Ba, Na, K, Al, Be, B, Ti, Zr, Cu, Zn, Ga, Sn or V, the doping element X is one or more of F, Cl, Br, I or S, and the surface treatment material is one or more of organic substances containing Ti and/or Al. Through the surface treatment on the doped and modified lithium manganate, the compatibility of the lithium manganate material with an electrolyte is increased, less Mn is dissolved out in the electrolyte, the high-temperature storage performance and high-temperature cycle performance of the lithium manganate material are improved, and the bulk phase stability and the surface stability of the material are improved at the same time.

Description

technical field [0001] The invention relates to a lithium manganate material for a lithium ion battery and a preparation method thereof, in particular to a surface-treated lithium manganate material for a lithium ion battery and a preparation method thereof. Background technique [0002] At present, lithium-ion batteries have been widely used in mobile phones, notebook computers, digital products and other fields. With the increasingly serious energy crisis, the application of lithium-ion batteries in new energy vehicles has become a hot research field. The positive electrode material used in traditional lithium-ion batteries is lithium cobalt oxide. Due to the high price of cobalt and the poor safety of lithium cobalt oxide materials, it is difficult to be used as electric vehicle batteries. [0003] Spinel-type lithium manganese oxide has become one of the most promising positive electrode substitute materials for its rich raw material resources, low price, good safety, no...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M4/505
CPCY02E60/10
Inventor 韩坤明刘大亮陈彦彬刘亚飞张杰李鸿儒
Owner BEIJING EASPRING MATERIAL TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap