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Negative electrode material for lithium ion batteries and preparation method thereof

A lithium-ion battery and anode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as low specific capacity and inability to meet large-scale energy storage

Active Publication Date: 2019-09-24
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the low specific capacity of the current aromatic imide lithium-ion batteries in the field and cannot meet the requirements of large-scale energy storage, and then provide a lithium-ion battery negative electrode material and its preparation method

Method used

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  • Negative electrode material for lithium ion batteries and preparation method thereof
  • Negative electrode material for lithium ion batteries and preparation method thereof
  • Negative electrode material for lithium ion batteries and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0101] Example 1 Preparation of 3,3',4,4'-benzophenone tetracarboxylic diimide polymer (PBZTI)

[0102]

[0103] PBZTI is any of the following polymers:

[0104] A:

[0105] B:

[0106] C:

[0107] D:

[0108] Among them, n=1-5.

[0109] Its concrete reaction steps are as follows:

[0110] at room temperature, N 2 Under protective conditions, 3.2385g 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA) was added into a three-necked flask along a dry funnel, and 10mL of 1-methyl-2-pyrrolidone ( NMP) was added into the three-necked flask, during the addition process, all the BTDA on the funnel and the bottle wall were washed down, and stirred for 20 min until a uniform transparent solution was formed.

[0111] at room temperature, N 2 Under protective conditions, 0.5057g N 2 h 4 Add the three-necked flask along the dry funnel. At this time, light yellow agglomeration occurs. Add 5mL NMP into the three-necked flask with a disposable dropper. During the ad...

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Abstract

The invention discloses a negative electrode material for lithium ion batteries and a preparation method thereof. The negative electrode material disclosed by the invention for lithium ion batteries is an aromatic imide polymer as shown in the general formula (1) defined in the description. The battery negative electrode material prepared from the aromatic imide polymer has extremely low oxidation-reduction potential and is expected to be an electrode material for novel electrochemical elements, thereby having good industrial applications and popularization prospects.

Description

technical field [0001] The invention relates to a lithium ion battery negative electrode material and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of smart grid, new energy generation (wind energy, solar energy, etc.), and power (hybrid) vehicles, the research and development of energy storage technology, especially large-scale energy storage technology, has become an urgent problem to be solved. Rechargeable lithium-ion batteries have been widely used in mobile phones, computers, and other portable electronic products due to their high energy density and power density, and are the most commonly commercialized batteries. However, the current energy density, cycle performance, and rate performance of lithium-ion batteries are far from meeting the actual requirements. Therefore, the development of lithium-ion batteries that can meet large-scale energy storage has become a global research hotspot. [0003] The most cri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/60H01M10/0525
CPCH01M4/606H01M10/0525Y02E60/10
Inventor 关士友王亚茹林书玮
Owner SHANGHAI UNIV
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