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Lithium Tetrafluoroborate CAS 14283-07-9

Molecular Formula: BF4Li

Formula Weight: 93.75

ZSpharmac: Lithium Tetrafluoroborate Supplement

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Product Name: Lithium Tetrafluoroborate
CAS No: 14283-07-9
Purity: 99%

Basic Info

Product Name:Lithium Tetrafluoroborate
Other Names:Lithiumtetrafluoroborate
CAS:14283-07-9
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Inorganic Chemical Raw Materials
Appearance:White to off-White Powder
EINECS No.:238-178-9
Storage:Store Below +30°C.
Provide:Lithium Tetrafluoroborate MSDS;
Lithium Tetrafluoroborate COA

What is Lithium Tetrafluoroborate?

Electrolyte solution is an important part of lithium ion battery, which plays the role of transporting ion conduction current between the positive and negative electrodes, and is an indispensable part to complete the electrochemical reaction. Selecting a suitable electrolyte is also the key to obtain lithium-ion batteries with high energy density and power density, long cycle life, and good safety performance. The performance of the electrolyte directly affects the optimization and improvement of the performance of lithium-ion batteries. At present, the electrolyte of commercial lithium-ion batteries is mainly lithium hexafluorophosphate (LiBF6). Lithium hexafluorophosphate has the advantages of good electrical conductivity, stable solid electrolyte membrane formation, low internal resistance and fast charging and discharging speed, and is currently the preferred electrolyte for lithium-ion battery electrolytes. However, this electrolyte has problems such as being too sensitive to moisture, unstable to heat, and easy to release PF5 after being heated; the SEI film generated at low temperature has too large resistance and is easy to decompose when the temperature of the electrolyte rises above 80 °C, which in turn causes the solvent break down.

Lithium tetrafluoroborate, molecular formula LiBF4, molecular weight 93.74, mainly used as electrolyte lithium salt for lithium ion battery electrolyte. With the rapid development of mobile communication and portable electrical appliances in modern society, lithium-ion secondary batteries are widely used in people’s daily life due to their high energy density, high operating voltage, small memory effect, low self-discharge rate, lightness and convenience. application. At present, the classic electrolyte system used in lithium-ion secondary batteries is that the electrolyte salt is dissolved in an organic aprotic solvent. As one of the basic raw materials of lithium-ion batteries, the electrolyte directly affects the working performance of lithium-ion batteries.

In comparison, lithium tetrafluoroborate (LiBF4) has good chemical and thermal stability, is sensitive to environmental water distribution, and is expected to develop into an excellent electrolyte system widely used in energy storage and power lithium-ion batteries. At present, the preparation methods of lithium tetrafluoroborate include aqueous method, gas-solid reaction method and non-aqueous solution method. The aqueous solution method uses hydrofluoric acid, boric acid and lithium carbonate as raw materials, the process conditions are mild, no explosive chemicals are involved, and the synthesis is simple and safe; however, the product obtained after the aqueous solution method reacts with lithium tetrafluoroborate monohydrate. The crystal water itself becomes molten state, which makes it difficult to dehydrate, and the content of insoluble matter is high.

Lithium Tetrafluoroborate Properties:

Melting point 293-300 °C (dec.) (lit.)
density 0.852 g/mL at 25 °C
Fp 6 °C
storage temp. Store below +30°C.
form powder
color White to off-white
Specific Gravity0.852
PH2.88
Water Solubility SOLUBLE

 

Lithium Tetrafluoroborate Application

At present, LiBF4 is mainly used as an additive for LiBF6-based electrolyte systems to improve cycle life and improve the performance of lithium-ion batteries; as a film-forming additive, LiBF4 has been widely used in current electrolytes, and the addition of LiBF4 can broaden the working temperature of lithium-ion batteries range and improve the high and low temperature discharge performance of the battery.

If there is research to provide an electrolyte for a lithium ion battery capable of ultra-low temperature discharge, stable performance and excellent cycle index, and a lithium ion battery thereof, the technical solution is: the electrolyte of the lithium ion battery capable of ultra-low temperature discharge is characterized in that the The electrolyte is formed by mixing lithium hexafluorophosphate, lithium tetrafluoroborate and a solvent, and the solvent includes ethylene carbonate, dimethyl carbonate, ethyl methyl carbonate, dimethoxyethane, and the weight ratio of lithium hexafluorophosphate and lithium tetrafluoroborate is 1 : Between 5 and 10:1, the concentration of the composite salt formed after mixing lithium hexafluorophosphate and lithium tetrafluoroborate is 0.7 to 1.2 mol/L, and the ratio between ethylene carbonate, dimethyl carbonate and ethyl methyl carbonate is proportional. Dimethoxyethane accounts for 0.5% to 10% of the total weight of the mixture of lithium hexafluorophosphate, lithium tetrafluoroborate, ethylene carbonate, dimethyl carbonate and ethyl methyl carbonate. According to the present invention, the ratio between ethylene carbonate, dimethyl carbonate, ethyl methyl carbonate and dimethoxyethane is 5:5:5:1, and the ratio between lithium hexafluorophosphate and lithium tetrafluoroborate is 1: 4. The concentration of the composite salt formed by mixing lithium hexafluorophosphate and lithium tetrafluoroborate is 1.0 mol/liter.

Preparation of Lithium Tetrafluoroborate

Method 1: a preparation technique of lithium tetrafluoroborate, comprising the adhering to actions:
1) According to the proportion of the mole ratio of H3BO3 to HF of 1:4 ~ 6, including boric acid to hydrofluoric acid to respond to acquire a fluoroboric acid option;

2) According to the proportion of Li to B molar ratio of 1.05 to 1.5:1, take the lithium substance as well as add it to the fluoroboric acid service acquired in step 1) to react to acquire a lithium tetrafluoroborate remedy;

3) Focus the lithium tetrafluoroborate option gotten symphonious 2), take shape by air conditioning, and also filter to get lithium tetrafluoroborate crystals;
4) drying out the lithium tetrafluoroborate crystals obtained in step 3) to get an unrefined lithium tetrafluoroborate;
5) The unrefined lithium tetrafluoroborate gotten symphonious 4) is put in an activator, and also fluorine gas or a fluorine-nitrogen combined gas is presented to respond to get the lithium tetrafluoroborate.

Method 2: a preparation technique of high-purity lithium tetrafluoroborate, making up the adhering to steps:
( 1) Under the problem of -10 ℃ ~ 10 ℃, slowly include boric acid to the hydrofluoric acid solution, regulate the molar ratio of boric acid and anhydrous hydrofluoric acid to be: H3BO3: HF= 1:( 4 ~ 6), then proceed Stir, react for 0.5-5h, as well as prepare a fluoroboric acid remedy;

( 2) Under the problem of -10 ℃ ~ 15 ℃, the lithium substance is included in the fluoroboric acid option acquired symphonious (1) according to the molar ratio Li: B= 1.05 ~ 1.5, and the reaction is stirred for 0.5-5h to get tetrafluoroethylene Lithium borate remedy;

( 3) The lithium tetrafluoroborate option is concentrated under the conditions of -0.05 ~ -0.09 MPa and also 50 ° C ~ 90 ° C, concentrated to 1/3 ~ 1/8 of the original volume of the lithium tetrafluoroborate option, and after that lowered to space temperature level Formation by cooling down, filtering system, the obtained solid is lithium tetrafluoroborate crystal;

( 4) The lithium tetrafluoroborate crystal is originally dried out at 30-60 ° C for 2-8h, and then vacuum-dried at 50-100 ° C for 2-8h to obtain a crude lithium tetrafluoroborate;

( 5) the lithium tetrafluoroborate crude item acquired symphonious (4) is dissolved in anhydrous hydrofluoric acid to obtain a response option, as well as the response temperature is controlled from 0 ° C to 15 ° C, and fluorine gas or fluorine-nitrogen blended gas is entered the reaction remedy Execute pollutant removal, where the consumption of fluorine gas is: the mole number of fluorine gas: the mole number of crystal water=( 1.5 ~ 15) in the lithium tetrafluoroborate unrefined product: 1, it is confirmed by experiments that under this problem, lithium tetrafluoroborate The impurity elimination effect in the crude item is excellent, the acquired product has high pureness, as well as the lithium tetrafluoroborate hydrofluoric acid mommy liquor is acquired after removing contaminations by fluorine;

( 6) Gradient cooling and formation of the lithium tetrafluoroborate hydrofluoric acid mom liquor, the condensation temperature is -40 ~ 0 ℃, filter, and the condensation item is dried out at 30 ~ 80 ℃ under nitrogen security to acquire a high-purity lithium tetrafluoroborate item, Filtrate recuperation and recycling.

Lithium Tetrafluoroborate Improves Performance of Lithium-ion Batteries

LiNi0.5Co0.2Mn0.3O2/graphite batteries were investigated as an electrolyte additive to improve the cycling performance at higher operating voltages. After adding 1.0 wt% LiBF4 to the electrolyte, the capacity retention of Li-ion batteries after 100 cycles at 3.0 V-4.5 V was greatly improved from 29.2% to 90.1%. Characteristics of voltage operation, including cell performance, impedance behavior, and electrode interface properties were examined. It was found that LiBF4 may be involved in the formation of the interfacial film on the two electrodes. The improved cell performance is attributed to the modification of the composition of the graphite anode and the LiNi0.5Co0 interfacial layer. 2Mn0.3O2 cathode, resulting in lower interface impedance. (C) Electrochemical Society 2013.

Company Profile and Corporate Culture

Company Profile:

ZhiShang Chemical is owned by ZhiShang Group is a professional new-type chemicals enterprise combined into research and development, production and sales .

The company’s competitive product is pharmaceutical raw materials and intermediates (especially carbohydrate derivatives Series), In recent years, the company has made a major breakthrough in food and feed additives, plant extraction, industrial chemicals industry .

The company insists on the spirit of “sincere management, strict quality control, customer as god” , get consistent high praise from customers at home and abroad.

Corporate Culture:

OUR MISSION
Help China Chemicals to benefit the happiness of human life
OUR VISSION
Become the most trusted chemical supplier in the world
OUR BUSINESS PHILOSOPHY
Striver – oriented, enrich employees, customer first, deep service, seek development
OUR VALUES
Be prepared for danger in times of peace, forge ahead actively, unity and cooperation, and be brave to fight

About Us

The production base is located in Zhangqiu chemical industry park and Tai’an high-tech chemical industry park. laboratory and workshop in strict accordance with the GMP standard and the product fit national ISO9001 and ISO2000 standards.

“Zhishang” products are exported to Europe, North and South America, the Middle East, Asia Pacific and Africa area, so as to establish a long-term and stable cooperation relationship with customer in the world.

Company Info
  • Business Type: Manufacturer
  • Product Range: Additive , Chemical Auxiliary & Catalyst , Organic Chemicals
  • Products/Service: Organic Intermediate,Inorganic Chemistry, APIs, Dyestuffs And Pigments, Fragrance And Spices, Food Additives
  • Total Employees: 51~100
  • Capital (Million US $): 10000000RMB
  • Year Established: 2016
Production Capacity
  • No. of Production Lines : 8
  • No. of QC Staff : 5 -10 People
  • OEM Services Provided : yes
  • Factory Size (Sq.meters) : 3,000-5,000 square meters
  • Certificate: ISO9001 , CE , GMP , API , MSDS
  • Factory Location : Diao Town Industry Park, Zhangqiu City, Jinan City, Shandong Province, China.

Service

Pre-Sales Service

* Prompt reply and 24 hours online, professional team to provide best price and high quality product.

* Sample testing support.

* Every batch of products will be tested to ensureits quality.

*The packing also can be according the customers` requirment.

*Any inquiries will be replied within 24 hours.

*we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.

 

After-Sales Service

*The fact of logistics information monitoring.

* Any questions about the product can be consulted at any time.

*Product has any problem can return.

FAQ

Do you accept sample order?

We will make samples before mass production, and after sample approved, we’ll begin mass production. Doing 100% inspection during production, then do random inspection before packing.

 

HOW TO CONFIRM THE PRODUCT QUALITY BEFORE PLACING ORDERS?

You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.

What’s your MOQ?

Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.

Do you supply product report?

Yes. We’ll give you product analysis report before shipping.

  Is there a discount?

Different quantity has different discount.

Shipping

1. ≤50kg, Express delivery recommended, usually called as DDU service;

2. ≤500kg, Air shipping recommended, usually called as FOB, CFR, or CIF service;

3. >500kg, sea shipping recommended, usually called as FOB, CFR, or CIF service;

4. For high value products, please select air shipping and express delivery for safe.

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