Process for producing negative electrode material coke by taking supercritical extraction oil slurry as raw material and application of process

A negative electrode material and supercritical technology, applied in the petroleum industry, coke ovens, battery electrodes, etc., can solve problems such as low cycle life, limited performance improvement space, complex process, etc., and achieve the effect of improving quality

Active Publication Date: 2017-05-10
SHANDONG YIDA NEW MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon materials currently used for negative electrode materials include natural graphite, mesocarbon microspheres, needle coke, etc. Among them, natural graphite has a low charge and discharge potential and a stable potential platform, but in the process of charge and discharge, with the solvation With the intercalation of lithium ions, the graphite layer is easy to peel off, resulting in a low cycle life; the process of mesocarbon microspheres is mature, but the process is complicated, the production cost is high, and the room for performance improvement is limited

Method used

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  • Process for producing negative electrode material coke by taking supercritical extraction oil slurry as raw material and application of process
  • Process for producing negative electrode material coke by taking supercritical extraction oil slurry as raw material and application of process
  • Process for producing negative electrode material coke by taking supercritical extraction oil slurry as raw material and application of process

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Experimental program
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Effect test

Embodiment 1

[0030] ①Raw material preheating: put the aromatic-rich raw material into the convection section of the coking heating furnace through the aromatic-rich oil tank, and heat it to 300-340°C; ②After heating, the aromatic-rich oil enters the bottom of the coking fractionation tower in two ways The mass ratio of the aromatic-rich oil in the coking fractionation tower is 7:3; ③ fractionation: the temperature at the top of the coking fractionation tower 3 is controlled at 110-130°C to fractionate light components, and the temperature at the bottom of the coking fractionation tower is 330- 360°C to obtain heavy aromatics-rich oil components and tail oil; ④ Heating and coking: The heavy aromatics-rich oil components at the bottom of the coking fractionation tower enter the radiant section of the coking heating furnace through the heating furnace feed pump and are heated to 450-500°C and enter the coke tower for further processing. Coking; Among them, the coking temperature in the coke to...

Embodiment 2

[0032] ①Raw material preheating: The aromatic-rich raw material is pumped into the convection section of the coking heating furnace through the raw material pump, and heated to 300-340°C; The mass ratio of aromatic oil in the tower is 7:3; ③ Fractionation: the temperature at the top of the coking fractionation tower is controlled at 110-130°C to fractionate light components, and the temperature at the bottom of the coking fractionation tower is 330-360°C. Obtain heavy aromatics-rich oil components and tail oil; ④ Heating and coking: The heavy aromatics-rich oil components at the bottom of the coking fractionation tower enter the radiant section of the coking heating furnace through the heating furnace feed pump and are heated to 450-500°C and enter the coke tower for coking; , the coking temperature in the coke tower is 430-500°C; the coking pressure is 0.5-0.8MPa; the cycle weight ratio is 0.5-1.0; the coking cycle is 24-48h; The aromatic-rich oil in the coking fractionation ...

Embodiment 3

[0034]①Raw material preheating: The aromatic-rich raw material is pumped into the convection section of the coking heating furnace through the raw material pump, and heated to 300-340°C; The mass ratio of aromatic oil in the tower is 7:3; ③ Fractionation: the temperature at the top of the coking fractionation tower is controlled at 110-130°C to fractionate light components, and the temperature at the bottom of the coking fractionation tower is 330-360°C. Obtain heavy aromatics-rich oil components and tail oil; ④ Heating and coking: The heavy aromatics-rich oil components at the bottom of the coking fractionation tower enter the radiant section of the coking heating furnace through the heating furnace feed pump and are heated to 450-500°C and enter the coke tower for coking; , the coking temperature in the coke tower is 500-520°C; the coking pressure is 0.5-0.8MPa; the cycle weight ratio is 0.5-1.0; the coking cycle is 24-48h; The aromatic-rich oil in the coking fractionation t...

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Abstract

The invention belongs to the technical field of production of negative electrode materials and in particular relates to a process for producing negative electrode material coke by taking supercritical extraction oil slurry as a raw material and application of the process. Before aromatic hydrocarbon-enriched oil is coked, fractional distillation of a fractional distillation tower and a light component removing process are combined; produced raw coke is subjected to drying treatment so that the water content of the raw coke is less than one percent; the process is used for producing the negative electrode material coke; the graphitization degree of a lithium-ion battery prepared by a negative electrode material for preparing the lithium-ion battery reaches 95 percent or more and the capacity reaches 360mAh/g.

Description

technical field [0001] The invention belongs to the technical field of negative electrode material production, and in particular relates to a process for producing negative electrode material coke using supercritical extraction oil slurry as a raw material and its application. Background technique [0002] At present, China has become one of the largest lithium battery production and manufacturing bases in the world. In recent years, the development of the global lithium battery material market has been accelerating, and the demand for lithium battery market has been rising steadily, which directly drives the great development of the material market. Domestic new energy vehicles are showing a trend of rapid industrialization under the background of continuous implementation of government support policies. It is estimated that by 2018, negative electrode materials will maintain rapid growth at an average annual compound growth rate of 30-50%. [0003] Lithium-ion anode mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B55/00C10B57/04H01M4/587
CPCC10B55/00C10B57/045H01M4/587Y02E60/10
Inventor 彭莉徐金城范鲁宁李慎耐李永涛王宇豪
Owner SHANDONG YIDA NEW MATERIAL
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