Carbon nanotube polymer lithium ion battery and preparation method thereof

A technology of lithium-ion batteries and carbon nanotubes, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as structural instability, achieve the effects of reducing decomposition, increasing residual capacity, and improving electronic conductivity

Inactive Publication Date: 2016-06-29
深圳市言九电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the current technical level, both the compaction density and energy density of LCO are close to the theoretical values, and the high-voltage potential of LCO has been fully tapped. However, as the voltage rises, the shortcomings of the unstable structure of LCO materials will become more prominent.

Method used

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  • Carbon nanotube polymer lithium ion battery and preparation method thereof
  • Carbon nanotube polymer lithium ion battery and preparation method thereof
  • Carbon nanotube polymer lithium ion battery and preparation method thereof

Examples

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Embodiment 1

[0035] Embodiment 1 A kind of carbon nanotube polymer lithium ion battery and preparation method thereof

[0036] A carbon nanotube polymer lithium ion battery of the present embodiment, in terms of mass percentage, the active material of the positive electrode of the lithium ion battery consists of lithium cobaltate coated with 55% carbon nanometers and nickel cobalt coated with 45% carbon nanometers Lithium manganese oxide is prepared; the electrolyte of the lithium-ion battery is an organic carbonate containing additives, and the additives are EC, PC-51a and EMC with a mass ratio of 1:1:1; the additives are in the electrolyte The amount in is 3%.

[0037] The preparation method of the carbon nanotube polymer lithium ion battery of the present embodiment comprises the following steps:

[0038] (1) Using NMP as a solvent, add polyvinylidene fluoride PVDF and stir for 1.5 hours, then add positive electrode active material and superconducting carbon nanotubes CNT and stir for ...

Embodiment 2

[0043] Embodiment 2 A kind of carbon nanotube polymer lithium ion battery and preparation method thereof

[0044] The active material of the anode of a kind of carbon nanotube polymer lithium ion battery of the present embodiment is identical with embodiment 1; The composition of the electrolyte of described lithium ion battery is identical with embodiment 1; The amount is 5%.

[0045] The preparation method of the carbon nanotube polymer lithium ion battery of this embodiment is the same as that of Embodiment 1.

Embodiment 3

[0046] Embodiment 3 A kind of carbon nanotube polymer lithium ion battery and preparation method thereof

[0047] A carbon nanotube polymer lithium ion battery of the present embodiment, in terms of mass percentage, the active material of the positive electrode of the lithium ion battery consists of lithium cobalt oxide coated with 50% carbon nanometers and nickel cobalt coated with 50% carbon nanometers Lithium manganate is prepared; the electrolyte of the lithium-ion battery is a room temperature ionic liquid containing additives, and the additives are DMC, VC, and DEC with a mass ratio of 1:1:1; the additives are contained in the electrolyte The amount is 4%.

[0048] The preparation method of the carbon nanotube polymer lithium ion battery of the present embodiment, except that the coating surface density of step (2) slurry is 185g / ㎡, the coating density of step (3) ceramic material layer is 6g / mm 2 Except, other steps are with embodiment 1.

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Abstract

The invention discloses a carbon nanotube polymer lithium ion battery and a preparation method thereof. Based on mass percent of the carbon nanotube polymer lithium ion battery, an active substance of a positive electrode of the lithium ion battery is prepared from 50-60% of carbon nanometer coated lithium cobalt oxide and 40-50% of carbon nanometer lithium nickel manganese cobalt. The preparation method comprises the following steps of taking NMP as a solvent, and preparing the active substance of the positive electrode, a super-conduction carbon nanotube and polyvinylidene fluoride into a slurry; applying the slurry onto an aluminum-foil substrate to obtain a positive pole plate; applying a ceramic material layer onto isolation paper; and preparing the coated positive pole plate, the isolation paper, a negative pole plate and an electrolyte into the lithium ion battery according to a conventional method. Compared with a traditional lithium ion battery, the lithium ion battery disclosed by the invention has higher gram capacity and energy density, has more residual capacity after used for repeatedly charging/discharging for 500 times, and has longer cycle service lifetime.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries. Specifically, the invention relates to a carbon nanotube polymer lithium ion battery with high voltage and high capacity density and a preparation method thereof. Background technique [0002] The battery industry is an important part of the new energy field and a new hot spot in the global economic development. It is closely related to the development of electric power, transportation, information and other industries. It is in a controlling position in transportation tools and large-scale uninterruptible power supply systems. Indispensable products for activities and human life. [0003] With the popularity of mobile Internet devices such as smartphones and laptops, the promotion of electric vehicles such as electric bicycles, and the development of aerospace technologies such as drones and space probes, the performance of lithium-ion batteries is facing higher development requirement...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525H01M4/505H01M4/583H01M4/1391H01M4/1393H01M10/0525H01M10/0567H01M4/62
CPCH01M4/1391H01M4/1393H01M4/366H01M4/505H01M4/525H01M4/583H01M4/625H01M10/0525H01M10/0567Y02E60/10
Inventor 李朋王华平向磊
Owner 深圳市言九电子科技有限公司
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