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Method for synthesizing dioxalate group lithium borate

A technology of lithium oxalate borate and synthesis method is applied in chemical instruments and methods, compounds containing elements of Group 3/13 of the periodic table, organic chemistry, etc. Simple process, improved high temperature cycle performance, less by-products

Inactive Publication Date: 2005-10-26
SHANDONG HIYI CHEM TECH
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AI Technical Summary

Benefits of technology

This patented technology makes it easier than previous methods because they involve fewer chemicals needed during their manufacturing processes while still maintaining environmental friendliness and stable properties over time. These technical benefits make them ideal for use with Lithium Ionic Battery (LIBS) cells that require long lifespan cycles at temperatures above 60° C or have poor durability when exposed to these conditions.

Problems solved by technology

This patents discuss various technical issues related to improving the properties of laminates that contain lithiions during charging/driving cycles. Lithia bifluoroarsuminate (LBO), another type of lanthanoid compound commonly found in lignoferrite, was developed due to their excellent chemical characteristics and environmental friendliness. They provide promising alternatives for replacing conventional lithiumsulfurate based liquid elec trochloride (LICh). Additionally, these novel laminate compositions should exhibit improved heat resistance over time without losing electrical efficiency.

Method used

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  • Method for synthesizing dioxalate group lithium borate
  • Method for synthesizing dioxalate group lithium borate
  • Method for synthesizing dioxalate group lithium borate

Examples

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example 1

[0020] Example 1 LiB(C 2 o 4 ) 2 Synthesis

[0021] Take 151.31 grams of oxalic acid, 45.06 grams of lithium carbonate, and 37.08 grams of boric acid, mix and ball mill them at 5°C for 2 hours, and then place them under the protection of argon at 300°C for 2 hours to obtain LiB(C 2 o 4 ) 2 111.6 g, 96% yield. The specific synthesis process is as figure 1 shown. The molecular structure of the resulting product was determined by infrared spectroscopy, as figure 2 shown. The resulting product is formulated into 0.8mol L -1 LiB(C 2 o 4 ) 2 EC / EMC / DEC electrolytes are applied to Li / graphite batteries for charge and discharge tests. The battery charge and discharge cut-off voltage is 3.000V~0.005V, and the current density is 33mA·g - 1 , The test temperature is 55°C. Test results such as image 3 shown. After charging and discharging tests, it can be found that using LiB(C 2 o 4 ) 2The Li / graphite battery with electrolyte has high charge-discharge capacity and ...

example 2

[0022] Example 2 LiB(C 2 o 4 ) 2 Synthesis

[0023] Take 113.46 grams of oxalic acid, 18.88 grams of lithium hydroxide, and 27.81 grams of boric acid, mix and ball mill them at 70°C for 4 hours, and then place them under nitrogen protection at 110°C for 6 hours to obtain LiB(C 2 o 4 ) 2 85.96 g, 98.6% yield. The resulting product is formulated into 0.8mol L -1 LiB(C 2 o 4 ) 2 / PC electrolyte was applied to Li / graphite battery for charge and discharge test. The battery charge and discharge cut-off voltage is 1.700V ~ 0.005V, and the current density is 33mA g -1 , the test temperature is 25°C. Test results such as Figure 4 shown. After charging and discharging tests, it can be found that LiB(C 2 o 4 ) 2 The use of electrolyte can effectively inhibit the structural damage of PC to graphite materials during charge and discharge, thus making it possible to use PC components in lithium-ion batteries.

example 3

[0024] Example 3 LiB(C 2 o 4 ) 2 Synthesis

[0025] Take 113.99 grams of lithium hydrogen oxalate, 126.07 grams of oxalic acid, and 43.83 grams of metaboric acid, mix and ball mill them at 25°C for 1 hour, and then place them under vacuum protection at 80°C for 24 hours to obtain LiB(C 2 o 4 ) 2 189.2 g, 97.7% yield.

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Abstract

The present invention provides a synthesis method of LiB (C2O4)2. It belongs to the field of lithium borate through, and can be used in lithium cell. Said invention adopts solid-phase synthesis method, and includes the following steps: ball-grinding and mixing reaction raw material lithium compound, borno compound and oxalic acid radical compound according to mole ratio of 1:1:2, ball-grinding temperature is 5 deg.C-70 deg.C and ball-grinding time is 1-4 hr., then heating ball-ground raw material to make it produce chemical reaction, its reaction environment is nitrogen gas, argon gas or vacuum environment, its reaction temp. is 80 deg.C-300 deg.C and reaction time is 2-24 hr, so as to obtain LiB(C2O4)2.

Description

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Claims

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Application Information

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Owner SHANDONG HIYI CHEM TECH
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