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The diaphragm plays two main roles in lithium-ion batteries. First, the diaphragm material needs to have good insulation and a certain strength to avoid direct contact between the positive and negative electrodes in the battery, and can effectively prevent short circuits caused by punctures such as burrs and dendrites, and ensure that there is no significant dimensional change under sudden high temperature conditions, thereby ensuring the safety of the battery. Second, the porous structure of the diaphragm can provide a good migration channel for lithium ions, ensuring stable and efficient operation of the battery.

In the structure of lithium batteries, battery separator refers to a layer of separator material between the positive and negative electrodes of the battery. It is a very critical part of the battery and has a direct impact on the safety and cost of the battery. Its main function is to isolate the positive and negative electrodes and prevent the electrons in the battery from passing freely, so that the ions in the electrolyte can pass freely between the positive and negative electrodes. The performance of the separator determines the interface structure and internal resistance of the battery, which directly affects the battery's capacity, cycle and safety performance. According to the differences in physical and chemical properties, lithium-ion battery separators can be divided into several categories: woven membranes, non-woven membranes (non-woven fabrics), microporous membranes, composite membranes, separator paper, rolled membranes, etc. Although there are many types, the ...

The mainstream mixing equipment used by lithium-ion battery manufacturing companies is the Double Planetary Mixer. The Double Planetary Mixer used in the lithium battery industry, also known as the PD Mixer, is equipped with low-speed stirring components (Planet) and high-speed dispersing components (Disper). The low-speed stirring components consist of two curved frame-type stirring blades, driven by planetary gears. As the blades revolve, they also rotate on their own axis, causing the material to move both vertically and horizontally, achieving the desired mixing effect in a short time. The high-speed dispersing components typically consist of toothed dispersing discs, which revolve in sync with the planetary frame, while also rotating at high speed. This creates intense shear and dispersion forces on the material, making it several times more effective than ordinary mixers. The dispersing components can be configured with either a single dispersing shaft or double dispersing shaft...

A djustable film coater  is a film coater with adjustable coating thickness. By adjusting the two differentiators above the film coater, the scraper below can be adjusted up and down to control the coating gap and ultimately achieve the desired coating thickness. Due to the use of a high-precision micrometer, the coating range is adjustable from 0 to 3500μm, and the gap of the scraper is adjusted in units of 10 microns during scraping. This film applicator is ideal for research projects where even the smallest differences in film thickness need to be accurately evaluated.

1.  Vacuum mixer SFM-7 It is used for stirring and shaking materials; it has high vacuum degree, strong stirring force and adjustable vibration amplitude. It is a dual-purpose machine with great value for money.   2. Digital Rotational Viscometer SNB-2-H A new digital product developed based on single-chip microprocessor technology and used to measure the viscous resistance and absolute viscosity of liquids.   3. Automatic coating and drying machine MSK-AFA-III Applicable to various high-temperature coating research. Ceramic thin films, crystal thin films, battery material thin films, special nano thin films. This product is equipped with a heating and drying system, and the materials are dried synchronously.   4. 52L  vacuum drying oven DZF-6050 Suitable for heating and drying items under vacuum conditions. Accurate temperature control, high precision; temperature control range from room temperature to 250 degrees; volume 52 liters...

Due to the rapid development of lithium-ion batteries, people's daily life and production methods have undergone tremendous changes. At present, lithium-ion batteries are needed in everything from laptops, tablets, cameras, mobile phones to new energy vehicles, and lithium-ion battery products have spread to every corner of people's lives.

Among many battery technologies, lithium titanate batteries stand out for their excellent safety and are considered the safest type of battery currently. This article will explore the characteristics of lithium titanate batteries in depth and analyze why they are superior to other battery technologies in terms of safety.

Lithium-ion batteries (LiBs) provide power for electric vehicles (EVs), and the anode plays a crucial role in their performance. Graphite materials, with excellent conductivity, thermal stability, and high performance, are the primary anode materials for lithium-ion batteries. Graphite has become the earliest commercialized negative electrode material for lithium-ion batteries due to its advantages such as high electronic conductivity, large lithium ion diffusion coefficient, small volume change before and after lithium insertion in its layered structure, high lithium insertion capacity (theoretical capacity can reach 372mA·h/g), and low lithium insertion potential.

Analysis of parameters, advantages and disadvantages of lithium manganese oxide batteries Lithium manganese oxide battery parameters: Nominal voltage: 3.7v Output voltage range: 2.5~4.2v Nominal capacity: 7500mAh Standard continuous discharge current: 0.2C Maximum continuous discharge current: 1C Working temperature: Charging: 0~45℃ Discharge: -20~60℃ Product size: MAX 19.2*56.5*69.5mm Finished product internal resistance: ≤200mΩ Lead wire model: National standard wire UL3302/26#, wire length 50mm, white wire is 10K NTC Protection board parameters: (Each parameter can be set according to customer products) Overcharge protection voltage/each string 4.28±0.025V Over discharge protection voltage 2.4±0.1V Overcurrent value: 2~4A

Lithium iron phosphate battery refers to a lithium-ion battery that uses lithium iron phosphate as the positive electrode material. The positive electrode materials of lithium-ion batteries mainly include lithium cobalt oxide , lithium manganese oxide, lithium nickel oxide, ternary materials, lithium iron phosphate, etc. Among them, lithium cobalt oxide is the positive electrode material used by most lithium-ion batteries at present. From the principle of materials, lithium iron phosphate is also an embedding and de-embedding process, and this principle is exactly the same as that of lithium cobalt oxide and lithium manganese oxide.

Ternary lithium battery classification Ternary lithium batteries, that is, lithium batteries that use nickel cobalt manganese oxide ( NCM ) or nickel cobalt aluminum oxide (NCA) as the positive electrode material, have various classification methods according to different classification standards. 

  Introduction to Lithium-ion Batteries (LIB) Lithium-ion batteries are mainly composed of four parts: positive electrode materials, negative electrode materials, separators, and electrolytes . The positive electrode materials must participate in chemical reactions and also provide Li+ as a lithium ion source; the negative electrode materials are also an important component of the battery, generally carbon, lithium titanate, and silicon-based alloy materials; the main function of the separator is to prevent the positive and negative electrode materials from directly contacting each other and causing a short circuit, and it is generally a porous membrane material such as polyethylene or polypropylene; the role of the electrolyte is to provide a channel for the transmission of lithium ions and promote the reversible reaction of the electrode. It is mainly composed of electrolyte lithium salts, non-aqueous organic solvents, and necessary additives. Figure 1. Applications of lithium-io...

Lithium cobalt oxide is the first commercialized cathode material for lithium-ion batteries. Its theoretical gram capacity after complete delithiation is 274 mAh/g, its true density is as high as 5.1 g/cm  3  , and its actual compacted density can reach 4.2  g/cm  3.  It has an extremely high volume energy density (the advantage is prominent under high voltage) and is still the most widely used cathode material for consumer batteries.In fact, lithium cobalt oxide has three crystal structures, namely high-temperature phase HT-  LiCo  O  2  , low-temperature phase LT  - LiCo  O  2  , and rock salt phase LiCo  O  2.  Among them, the synthesis temperature of low-temperature phase lithium cobalt oxide is relatively low, and the crystal structure characteristics are between the layered structure and the spinel structure. The Li layer contains about 25% Co atoms, and the Co layer contains about 25% Li ato...