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A kind of nano-carbon composite ternary material and preparation method thereof

A ternary material and nano-carbon technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of reducing surface area and utilization rate, affecting the structural stability and cycle of lithium-ion battery cathode materials Stability and high rate performance, nano-carbons are prone to agglomeration and other issues

Active Publication Date: 2021-05-04
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nano-carbons are prone to agglomeration and poor dispersion during use, which greatly reduces their surface area and utilization rate, which seriously affects the structural stability, cycle stability and high-rate performance of lithium-ion battery cathode materials during charge and discharge.

Method used

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  • A kind of nano-carbon composite ternary material and preparation method thereof
  • A kind of nano-carbon composite ternary material and preparation method thereof
  • A kind of nano-carbon composite ternary material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A nano-carbon composite ternary material and a preparation method thereof. The preparation method described in this embodiment is:

[0027] 1) According to the solution concentration of 4 ~ 5kg / m 3 , adding nano-carbon into deionized water and stirring for 1-2 hours to obtain solution I.

[0028] 2) According to the nano-carbon: LiNi 1-x-y co x mn y o 2 The mass ratio of the ternary material is 1: (3~8), and the LiNi is added to the solution I 1-x-y co x mn y o 2 The ternary material was stirred for 0.5-1 hour to obtain solution II.

[0029] 3) The solution II is added dropwise into the liquid nitrogen solution to obtain spherical beads, and then freeze-dried in a vacuum freeze dryer for 48-72 hours to obtain a nano-carbon composite ternary material.

[0030] The nano-carbon is reduced graphene.

[0031] The LiNi 1-x-y co x mn y o 2 The ternary material is LiNi 0.6 co 0.2 mn 0.2 o2 .

[0032] figure 1 It is a kind of nano-carbon composite ternary mat...

Embodiment 2

[0037] A nano-carbon composite ternary material and a preparation method thereof. The preparation method described in this embodiment is:

[0038] 1) According to the solution concentration of 3.5 ~ 4.5kg / m 3 , adding nano-carbon into deionized water and stirring for 1-2 hours to obtain solution I.

[0039] 2) According to the nano-carbon: LiNi 1-x-y co x mn y o 2 The mass ratio of the ternary material is 1:(6~11), and the LiNi is added to the solution I 1-x-y co x mn y o 2 The ternary material was stirred for 0.5-1 hour to obtain solution II.

[0040] 3) The solution II is added dropwise into the liquid nitrogen solution to obtain spherical beads, and then freeze-dried in a vacuum freeze dryer for 48-72 hours to obtain a nano-carbon composite ternary material.

[0041] The nano-carbon is doped graphene.

[0042] The LiNi 1-x-y co x mn y o 2 The ternary material is LiNi 0.8 co 0.1 mn 0.1 o 2 .

[0043] The nano-carbon composite ternary material prepared in ...

Embodiment 3

[0045] A nano-carbon composite ternary material and a preparation method thereof. The preparation method described in this embodiment is:

[0046] 1) According to the solution concentration of 3 ~ 4kg / m 3 , adding nano-carbon into deionized water and stirring for 1-2 hours to obtain solution I.

[0047] 2) According to the nano-carbon: LiNi 1-x-y co x mn y o 2 The mass ratio of the ternary material is 1:(9~14), and the LiNi is added to the solution I 1-x-y co x mn y o 2 The ternary material was stirred for 0.5-1 hour to obtain solution II.

[0048] 3) The solution II is added dropwise into the liquid nitrogen solution to obtain spherical beads, and then freeze-dried in a vacuum freeze dryer for 48-72 hours to obtain a nano-carbon composite ternary material.

[0049] The nano carbon is doped carbon nano tube.

[0050] The LiNi 1-x-y co x mn y o 2 The ternary material is LiNi 0.5 co 0.2 mn 0.3 o 2 .

[0051] The nano-carbon composite ternary material prepared...

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Abstract

The invention relates to a nano-carbon composite ternary material and a preparation method thereof. The technical solution is: according to the solution concentration of 2 ~ 5kg / m 3 , adding nano-carbon into deionized water and stirring for 1-2 hours to obtain solution I. According to the nano carbon: LiNi 1‑x‑y co x mn y o 2 The mass ratio of the ternary material is 1:(3~20), and the LiNi is added to the solution I 1‑x‑y co x mn y o 2 The ternary material was stirred for 0.5-1 hour to obtain solution II. The solution II is added dropwise into the liquid nitrogen solution to obtain spherical beads, and then freeze-dried in a vacuum freeze dryer for 48-72 hours to prepare a nano-carbon composite ternary material. The invention has the characteristics of simple process, convenient operation and easy industrial production, and the prepared nano-carbon composite ternary material has good dispersion, adjustable pore structure, stable structure, good cycle performance and excellent high-rate performance.

Description

technical field [0001] The invention belongs to the technical field of composite ternary materials. In particular, it relates to a nano-carbon composite ternary material and a preparation method thereof. Background technique [0002] Lithium-ion batteries have the advantages of high working voltage, large capacity, small self-discharge, good cycle performance, long service life, light weight and small size, and are widely used in many civil and military applications such as mobile phones, notebook computers, video cameras and digital cameras. field. As an important part of lithium-ion batteries, the performance and cost of cathode materials are crucial to the development of lithium-ion power batteries. [0003] At present, the positive electrode materials that can be industrialized and applied to power lithium-ion batteries include LiMn 2 o 4 、LiFePO 4 and LiNi 1-x-y co x mn y o 2 Ternary materials, etc. However, the Jahn-Teller effect can cause lattice distortion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/485H01M4/505H01M4/525H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/485H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 周盈科田小慧吴关朱彦斌席亚堃
Owner WUHAN UNIV OF SCI & TECH
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