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Lithium/fluorinated carbon nanotube battery and preparation method thereof

A technology of fluorinated carbon nanotubes and multi-walled carbon nanotubes, which is applied in the field of new lithium/fluorinated carbon nanotube batteries and their preparation, can solve the limitations, difficulties in achieving good coordination and balance of capacity and conductivity, and positive electrodes The material carbon fluoride has poor electronic conductivity and other problems, so as to achieve high conductivity, improve the effect of large current discharge, high output voltage and theoretical specific capacity

Active Publication Date: 2018-01-19
LIAONING LANJING TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The battery of this system has the advantages of stable working voltage, low self-discharge rate, good safety, and environmental protection. However, the current technical problem of lithium-carbon fluoride batteries is that the electronic conductivity of carbon fluoride, the positive electrode material, is poor, which affects the high current of the battery. discharge performance, making it limited in many areas
[0004] In order to improve this problem, people use various methods to increase the conductivity of the cathode fluorinated carbon without affecting the capacity, but it is always difficult to achieve a good coordination and balance in terms of capacity and conductivity.

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  • Lithium/fluorinated carbon nanotube battery and preparation method thereof

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preparation example Construction

[0023] The preparation method of the outer wall fluorinated multi-walled carbon nanotubes containing the iron fluoride intercalation substance, the specific steps are as follows:

[0024] 1. Mix the multi-walled carbon nanotubes with one or both of KOH and NaOH, and react in a tube furnace at 700-750°C for 3-4 hours under inert atmosphere conditions, so that the end caps of the multi-walled carbon nanotubes Open. Then, after cooling to room temperature, wash with neutral water and dry. After drying with concentrated HCl, concentrated HNO 3 One or both of them are mixed, and the reflux reaction time is 2 to 3 hours at 80 to 90°C, so that the surface of the multi-walled carbon nanotubes is cleaned and the purity is improved (the purity range is 99.0wt% to 99.9wt%). The acid or alkali The mass ratio to multi-walled carbon nanotubes is 30-80:1.

[0025] 2. Place the high-purity multi-walled carbon nanotubes with the end caps opened in a dry, vacuumable heating reactor, and feed...

Embodiment 1

[0034] In this embodiment, the lithium / carbon fluoride nanotube battery and its preparation method are as follows:

[0035] Firstly, an outer wall fluorinated multi-walled carbon nanotube (CFxFey) containing iron fluoride intercalation is prepared, wherein the fluorine-to-carbon atomic ratio is 0.5, and the iron-to-carbon atomic ratio is 0.2. The preparation method includes the following steps:

[0036] 1. Mix the dry multi-walled carbon nanotubes with KOH evenly, and react in a tube furnace at 700°C for 4 hours under a nitrogen atmosphere, then cool to room temperature, wash with water, and then dry. After drying, it is mixed with concentrated nitric acid (concentration: 85% by weight) of 40 times the mass ratio, refluxed at 80° C. for 2 hours, and then washed with water until neutrally dried.

[0037] 2. Place the high-purity multi-walled carbon nanotubes with the end caps opened in a dry, vacuumable heating reactor, and feed ferric chloride vapor with a mass ratio of 2:1 to...

Embodiment 2

[0044] In this embodiment, the lithium / carbon fluoride nanotube battery and its preparation method are as follows:

[0045] Firstly, an outer wall fluorinated multi-walled carbon nanotube (CFxFey) containing iron fluoride intercalation is prepared, wherein the fluorine-to-carbon atomic ratio is 0.6, and the iron-to-carbon atomic ratio is 0.2. The preparation method includes the following steps:

[0046] 1. Mix the dried multi-walled carbon nanotubes with NaOH evenly, react in a tube furnace at 750°C for 4 hours under a nitrogen atmosphere, then cool to room temperature, wash with water and then dry. After drying, mix with concentrated nitric acid (concentration: 85wt%) of 30 times the mass ratio, reflux at 90° C. for 2 hours, and then wash with water until neutral drying.

[0047] 2. Place the high-purity multi-walled carbon nanotubes with the end caps opened in a dry, vacuumable heating reactor, and feed ferric chloride vapor with a mass ratio of 2:1 to the multi-walled carbo...

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Abstract

The invention relates to the technical field of batteries, in particular to a novel lithium / fluorinated carbon nanotube battery and a preparation method thereof. The formula of a positive electrode material of the battery comprises the components by percentages: an outer-wall fluorinated multi-walled carbon nanotube containing a ferric fluoride intercalation material, 2-10% of a conductive agent of manganese dioxide composite graphene and 6-8% of a binder, wherein a negative electrode of the battery is lithium. By using the conductive agent of the manganese dioxide composite graphene, the electronic conductivity of the positive electrode material is improved. Meanwhile, by using the outer-wall fluorinated multi-walled carbon nanotube containing the ferric fluoride intercalation material, the internal resistances is reduced while the capacity of the electrode is improved, the polarization phenomenon is reduced and the discharge capability of the battery is improved. Therefore, a primarybattery with relatively high capacity and high rate capability can be provided and has good industrial and commercial value.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a novel lithium / fluorinated carbon nanotube battery and a preparation method thereof. Background technique [0002] At present, with the development of the economy, many electronic products need to use lithium batteries, especially some occasions need to use lithium primary batteries, such as: electronic locks and positioning functions of shared bicycles, gas and hydraulic testing instruments, remote radio frequency control equipment, etc. A primary lithium battery is a high-energy chemical primary battery, commonly known as a lithium battery. [0003] Common lithium primary batteries mainly include lithium manganese dioxide battery, lithium-carbon fluoride battery, lithium-copper sulfide, lithium-sulfur dioxide and lithium-thionyl chloride and other systems. In the solid cathode primary lithium battery, the theoretical mass specific energy of the lithium / carbon fluoride batte...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/583H01M4/58H01M4/62H01M6/16
Inventor 张柏华
Owner LIAONING LANJING TECH CO LTD
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