Method for preparing lithium ion battery cathode material by utilizing biomass gasification furnace filter residue

A technology for lithium ion batteries and negative electrode materials, which is applied to active material electrodes, battery electrodes, negative electrodes, etc., can solve the problems of low first coulomb efficiency of hard carbon materials, high raw material cost of polymer compounds, environmental pollution, etc., and save chemical industry. Raw materials, omitting intermediate synthesis steps, and the effect of strong safety performance

Active Publication Date: 2015-07-08
WUHAN KAIDI ENG TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Commonly used hard carbon materials mainly include resin carbon, organic polymer pyrolytic carbon and hydrothermal synthetic carbon microspheres. The raw materials are mainly polymer compounds and asphalt from fossil fuels. Hard carbon materials used as lithium-ion battery negative electrode materials include the following: Disadvantages: 1) The cost of raw materials of polymer compounds is high, and it is easy to pollute the environment; 2) The first coulombic efficiency of hard carbon materials is low

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  • Method for preparing lithium ion battery cathode material by utilizing biomass gasification furnace filter residue
  • Method for preparing lithium ion battery cathode material by utilizing biomass gasification furnace filter residue

Examples

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Embodiment 1

[0030] A kind of method utilizing biomass gasifier filter residue to prepare lithium-ion battery negative electrode material, comprises the following steps:

[0031] Mix the filter residue: sodium cetylbenzenesulfonate: deionized water at a mass ratio of 100:1:500, put it into an agate mortar and grind for 20 minutes, add deionized water, stir and wash 3 times to remove cetylbenzenesulfonate Sodium acid, obtain filter residue (intermediate product 1) standby after filtering; Then, in filter residue (intermediate product 1), press filter residue (intermediate product 1): the mass ratio of hydrochloric acid is that 1: 10 adds the hydrochloric acid that massfraction is 25%, in Closed and stirred in a constant temperature magnetic stirrer at 40°C for 40 minutes, fully removed impurities, then filtered and washed 4 times in clear water until the pH of the solution showed neutrality, and the filter residue (intermediate product 2) was obtained; then, the filter residue (intermediate ...

Embodiment 2

[0033] A kind of method utilizing biomass gasifier filter residue to prepare lithium-ion battery negative electrode material, comprises the following steps:

[0034]Mix filter residue: sodium lauryl sulfate: deionized water at a mass ratio of 100:2:700, put it into an agate mortar and grind for 40 minutes, add deionized water, stir and wash 3 times to remove sodium lauryl sulfate, filter Obtain the filter residue (intermediate product 1) for subsequent use; Then, press the filter residue (intermediate product 1): hydrochloric acid mass ratio 1: 20 in the filter residue (intermediate product 1) and add the hydrochloric acid that massfraction is 20%, at the constant temperature magnetic force of 40 ℃ Closely stir in the mixer for 1 h, fully remove impurities, filter out the filter residue and wash it in clean water 4 times until the pH of the solution is neutral to obtain the filter residue (intermediate product 2); then, place the filter residue (intermediate product 2) in In t...

Embodiment 3

[0036] A kind of method utilizing biomass gasifier filter residue to prepare lithium-ion battery negative electrode material, comprises the following steps:

[0037] Mix the filter residue: anhydrolibitan oleate: deionized water in a mass ratio of 100:4:1000, put it into an agate mortar and grind for 1 hour, add deionized water, stir and wash for three times to remove anhydrolibitan oleate , to obtain filter residue (intermediate product 1) after filtration for subsequent use; Then, in filter residue (intermediate product 1), press filter residue (intermediate product 1): the mass ratio of hydrochloric acid 1: 15 to add the hydrochloric acid that massfraction is 25%, at 40 ℃ Airtightly stir in a constant temperature magnetic stirrer for 1.5h, fully remove impurities, filter the filter residue and wash it 4 times in clear water until the pH of the solution shows neutrality to obtain the filter residue (intermediate product 2); then, filter the filter residue (intermediate produc...

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Abstract

The invention discloses a method for preparing a lithium ion battery cathode material by utilizing biomass gasification furnace filter residue. The method comprises the following steps: (1) mixing the biomass gasification furnace filter residue with a surface active agent to obtain a mixture, grinding the mixture adequately, removing the surface active agent in a water washing manner, carrying out the suction filtration, and obtaining the filter residue for standby use; (2) placing hydrochloric acid into the filter residue obtained in the step (1), adequately removing impurities, and filtering and washing the filter residue to be neutral for standby use; (3) placing the filter residue obtained in the step (2) into a mixed solution of polyethyleneimine and ethnoal, carrying out the oscillation, washing the polyethyleneimine and the ethanol after the adequate oscillation, filtering the mixed solution, and obtaining the filter residue for standby use; (4) placing nitric acid with mass fraction of 55 to 70 percent into the filter residue obtained in the step (3), adequately stirring the nitric acid and the filter residue under the temperature of 35 to 45 DEG C, carrying out the modification, washing the nitric acid, and filtering and drying to obtain the lithium ion battery cathode material. The prepared lithium ion battery cathode material is high in capacity, high in primary efficiency, good in cycling performance, safe and pollution-free; the method is simple in process flow, low in cost and applicable to the mass production.

Description

technical field [0001] The invention relates to the production technology of lithium-ion battery materials, in particular to a method for preparing negative electrode materials of lithium-ion batteries by utilizing the filter residue of a gasification furnace of a biomass synthetic oil plant. Background technique [0002] Lithium-ion batteries are widely used in various fields, such as mobile phones, computers, digital cameras, electric Vehicles, hybrid vehicles, new energy vehicles, ship power and aviation power and other fields. [0003] Lithium-ion battery anode materials have an important impact on the safety, cycle life and energy density of lithium batteries. At present, lithium-ion battery anode materials mainly include carbon materials, tin-based materials, silicon materials and lithium titanate. Due to the poor cycle stability of tin-based materials, serious volume effect of silicon materials and the low capacity and high cost of lithium titanate, the current Comm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/139H01M4/1393H01M4/1391
CPCH01M4/04H01M4/139H01M4/1391H01M4/1393H01M10/0525H01M4/587H01M2004/027Y02E60/10
Inventor 周欢欢程宇婷
Owner WUHAN KAIDI ENG TECH RES INST CO LTD
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