What is the electrolyte made of?

Introduction What is the electrolyte made of? The electrolyte is composed of a variety of substances, mainly including the following: Electrolyte The lithium salt used in the electrolyte, that is, various lithium-containing compounds, is dissolved in the solvent.

What is the electrolyte made of?

The electrolyte is composed of a variety of substances, mainly the following:

Electrolyte

Lithium used in salts of the electrolyte, that is, various lithium-containing compounds release large quantities of active lithium ions when dissolved in solvents. Commonly used lithium salts include LiPF6, LiClO4, LiBF4, LiBOB, LiTFSI, LiAsF6, etc. Among them, LiPF6 is currently a relatively mature commercial lithium salt.

These lithium salts each have their own advantages and disadvantages. In actual use, LiPF6 is often used as the main one, and other types are added in appropriate quantities to achieve their advantages and improve the performance of the electrolyte. .

Solvent

Lithium batteries generally use organic solvents. The negative electrode potential of lithium-ion batteries is very close tothat of lithium and is not sufficiently stable in aqueous solution systems. This is why organic solvents are used as ion carriers.

Common types of solvents for lithium battery electrolytes include carbonates, ethers, and hydroxy acid esters.

In order to improve the conductivity of the electrolyte, it is theoretically appropriate to choose a solvent capable of supplying as many active lithium ions as possible to the solution, i.e. the solubility of the electrolyte it contains is high, and the degree of dissociation of the solute molecules must also be high; the dielectric constant of the solvent is high and the viscosity is low. In fact, solvents with high dielectric constants also have high viscosity and should be selected based on actual conditions.

Additives

Additives refer to a small amount of substances aadded to the electrolyte other than the solute. It generally cannot store electricity. is to improve the performance of the electrolyte, improve the stability of the battery, etc.

Be sure to ensure the purity of the electrolyte before measuring it. Professional electrolyte filtration equipment can be used for filtration.

Professional electrolyte filtration equipment

Lithium battery electrolyte is an important component of the battery and has a great impact on the performance of the battery. battery.

In traditional batteries, the electrolytic system uses water as a solvent.

However, since the theoretical voltage for water decomposition is only 1.23 V, even taking into account the overpotential of hydrogen or oxygen, the maximum voltage of the battery with an electrolytic system using water as a solvent is only about 2 V (like a batterylead).

The voltage of lithium batteries reaches 3-4V. The traditional aqueous solution system is obviously no longer suitable for the needs of batteries, and a non-aqueous electrolyte system must be used as the electrolyte of lithium-ion batteries.

Lithium battery electrolytes mainly use organic solvents and electrolytes that can withstand high voltages without decomposing.

The electrolyte used in lithium-ion batteries is an ionic conductor with electrolytic lithium salt dissolved in an organic solvent.

Generally, as an organic electrolyte for practical lithium-ion batteries, it should have the following properties: (1) High ionic conductivity, which should generally reach 10-3——2*10- 3S/cm;

The migration number of lithium ions should be close to 1;

(2) The potential range of electrochemical stability is wide;

It there must bene electrochemical stability window from 0 to 5 V;

(3) Thermal Good stability, wide operating temperature range;

(4) Stable chemical properties, no chemical reaction with the current collector and mild substances in the battery;

(5) Safe and low-toxic, preferably biodegradable.

Suitable solvents should have a high dielectric constant and low viscosity. Commonly used solvents include alkyl carbonates such as PC and EC, which are highly polar and have a high dielectric constant, but have high viscosity and intermolecular forces. , lithium ions move slowly there.

Linear esters such as DMC (dimethyl carbonate) and DEC (diethyl carbonate) have a low viscosity but also a low dielectric constant. Therefore, in order to obtain high ionic conductivity, for liquid solutions, solvents mixts such as PC+. DEC and EC+DMC are generally used.

These organic solvents have some odor, but generally speaking, they can meet EU RoHS and REACH requirements. These are very toxic and environmentally friendly materials.

The currently developed inorganic anion conductive salts mainly include three categories: LiBF4, LiPF6 and LiAsF6. Their conductivity, thermal stability and oxidation resistance are in the following order: Conductivity: LiAsF6≥LiPF6>LiClO4>LiBF4 Thermal stability. : LiAsF6>LiBF4>LiPF6 Oxidation resistance: LiAsF6≥LiPF6≥LiBF4>LiClO4 LiAsF6 has very high conductivity, stability and battery charge and discharge rate, but arsenic toxicity limits its application .

Currently, the most commonly used is LiPF6.

All materials in currently commonly used lithium batteries, including electrolytes,comply with EU RoHS and REACH requirements and are environmentally friendly energy storage products.

  • Popular Focus
  • Where is the cheapest battery wholesale?

    Where is the cheapest battery wholesale in Tangxia, Sanyuanli, Baiyun District? There is an enterprise specializing in the independent production of electric vehicles in Tangxia, Sanyuanli, Baiyun District, Baiyun Sanyuanli Avenue, Baiyun Sanyuanli Street
    08-02
  • Four 3.7V lithium batteries in series and parallel produce 7.4V/4.4A. How to reduce it to 4.8V/4.4A?

    Four 3.7V lithium batteries in series and parallel produce 7.4V/4.4A. I personally think it is impossible to reduce it to 4.8V/4.4A. Because the discharge platform of lithium batteries is generally set
    08-10
  • What are the materials of the negative electrodes of lithium batteries?

    What are the materials of the negative electrodes of lithium batteries? The main commercial applications of lithium batteries include graphite, which is a sheet of copper used to guide current and which does not react. another safe
    08-02
  • The difference between 18500 and 26500 batteries

    What is the difference between 18500 and 26500 batteries? The answer above is 18650. The person asking the question should ask what is the difference between 18505 and 26500 batteries. In the case of Fuant ER1
    08-02
  • What does 3.7V 80mAh written on a lithium battery mean?

    What does 3.7V 80mAh written on a lithium battery mean? 3.7 V, 80 mA = 0.08 A, H means 1 hour, or 3600 seconds. Taken together, it is
    08-02
  • How long does a lithium battery (cell phone battery) last?

    How long does a lithium battery (cell phone battery) last? The lifespan of mobile phone batteries, under normal conditions of use and without serious impact, the lifespan set by the manufacturer must be 5 years.
    08-02
  • Will lithium batteries explode when charging?

    Will lithium batteries explode when charged? Will lithium batteries explode when charged? Lithium battery explosions usually occur during the charging process, because the negative electrode material of lithium batteries is graphite or other carbon materi
    08-02
  • Parameters of lgdas31865 lithium battery

    Parameters of lgdas31865 lithium battery The parameters of lgdas31865 lithium battery are as follows: LGDAS31865 is a model 18650 lithium battery with a capacity of
    08-02
  • What are the main components of lithium battery electrolyte?

    What are the main components of lithium battery electrolyte? The composition of lithium battery electrolyte is shown below. 1. Ethylene carbonate: molecular formula C3H4O3. Colorless transparent liquid (>35℃), room temperature
    08-02
  • Who are the lithium battery manufacturers in Shandong?

    What are the lithium battery manufacturers in Shandong? Shandong Shengyang Power Supply Co., Ltd. and Shandong Weineng Environmental Protection Power Technology Co., Ltd. 1. Shandong Shengyang Power Supply Co., Ltd. is located in Shengyang, Qufu City.
    08-02
  • Types of drone batteries available in 2024

    Part 1. Types of drone batteries available in 2024In 2024, drone batteries have advanced significantly, offering a range of options to cater to various needs in
    07-30
  • How long does it take to charge 26650 battery?

    How long does it take to charge a 26650 battery? The charging time for a 26650 battery is generally between 3 and 6 hours, but the precise time depends on the power of the charger and the capacity of the battery. in general
    08-02
  • For what?Sure, here's an article based on the phrase "For what?

    The simple yet profound question, "For what?" often serves as a gateway to deeper reflections on purpose and intention. It is a query that invites us to delve into the reasons behind actions, decisions, and circumstances that shape our lives and the wor
    08-02
  • Choosing the Right Cart Battery

    This comprehensive guide will walk you through everything you need about cart batteries, from understanding different types to making an informed purchase decision.
    08-02
  • 30mAh~500mAh 3.7 V Li-ion Battery

    Welcome to Ufine's collection of 3.7V lithium-ion batteries ranging from 30mAh to 500mAh. Explore a diverse range of compact and lightweight batteries suitable for various electronic devices,
    08-02
  • Here are 10 essential facts about drone batteries for 2024.

    10 Key Facts About Drone Battery for 2024 In 2024, drone batteries have advanced significantly, offering a range of options to cater to various needs in the consumer, commercial, and industrial sectors. Below are the primary types of drone batteries avai
    08-02
  • Could you please explain the difference among IMR, ICR, INR, and IFR 18650 batteries?

    What is the Difference Between IMR, ICR, INR, and IFR 18650 Battery?In 18650 batteries, discerning the differences among IMR, ICR, INR, and IFR types is fundamental for tailored and efficient battery usage. These distinct
    08-02
  • Safety considerations for cart batteries

    Selecting the ideal cart battery is crucial for ensuring optimal performance and longevity of your electric vehicle or vaping device. This comprehensive guide w
    08-01