Application of Bolerfei Viscometer in Lithium Ion Battery Slurry

In today's society, lithium-ion batteries have become an indispensable part of our lives. On average, each person has several lithium batteries. Whether it is a mobile phone, a laptop or a digital camera, the lithium-ion battery is indispensable. In 1991, lithium-ion batteries were introduced and commercialized. Lithium-ion batteries stand out in the batteries with their large capacity, high voltage and good cycle performance, making them the most promising and promising batteries.

In the domestic lithium-ion battery industry market, lithium-ion batteries are mainly concentrated in Guangdong, Shandong, Jiangsu, Zhejiang, Tianjin and other places, with Guangdong accounting for more than 60% of the total. Guangdong Province is also mainly concentrated in Shenzhen, Dongguan, Zhongshan and other places. Among China's numerous lithium-ion battery manufacturers, about 40% of domestic-funded enterprises, foreign-funded and Chinese-foreign cooperative enterprises account for more than 50%. With the support of the new energy policy, it is expected that lithium batteries will achieve unprecedented development in 2015. With the maturity of its technology, its use in various industries will become more and more popular, especially the application of energy storage industry will also step into the market. People's vision.

Lithium-ion batteries - the magic weapon lies in materials, measuring electrolytes, the selection and optimization of organic electrolytes is the key technology for the development of lithium batteries. Coating, monitoring viscosity to ensure uniform coating and ensure gram density. If the viscosity is too low, the entire batch of slurry is waste, or the slurry has precipitated and needs to be dispersed. To ensure accurate and reliable viscosity data for a more realistic response to the characteristics of lithium ion electrolytes, we will introduce you to the solution for viscosity measurement of Brookfield lithium-ion batteries.

Recommended solution: Brookfield LVDV-3T ULA

》》Measure the viscosity of the electrolyte, you can use the Brookfield LVDV-3T ULA

Lithium-ion batteries are the new generation of battery crowns. Lithium-ion batteries are used in various industries. The main applications of lithium-ion batteries are rechargeable batteries, electric tools and electric vehicles for portable electronic products. As the selection and optimization of organic electrolyte is the key technology to develop lithium battery, the viscosity measurement of electrolyte is an important factor that will affect the quality of lithium ion battery. Brookfield offers high quality lithium ion battery electrolyte viscosity measurement solutions.

Effect of Solid Content and Slurry Viscosity on Slurry Stability

For the mixing process, the mixing process, binder, solid content and slurry viscosity of the slurry have great significance for the stability of the slurry. This paper mainly studies A1 anode slurry, optimizes the stirring process, stabilizer, solid content and slurry viscosity to improve the stability of the slurry, and provides reference for production and basic research. Solid content and slurry viscosity are mixed. An important indicator in the process has a greater impact on the subsequent coating process. The same process and formulation, the higher the solid content of the slurry, the greater the viscosity, and vice versa.

Factors affecting the viscosity of the slurry: the speed of the stirring slurry, time control, batching sequence, ambient temperature and humidity, etc. The positive electrode slurry absorbs moisture in the air when exposed to the air, and the binder agglomerates, so that the viscosity of the slurry is increased. In addition, the sedimentation and agglomeration of the particles may also increase the viscosity. The effect of different viscosity on the electrode is mainly the uniformity of the dressing amount. In the case of extremely poor consistency, the anode will be partially decomposed during the charging process, and the cycle becomes worse and worse [2]. The viscosity of the slurry itself does not affect the performance of the battery core, but it has a great influence on the stability of the slurry, and the viscosity will cause various problems in coating. The adjustment of the viscosity of the slurry is required according to the performance characteristics of the material and the coating machine. Performance to set the adjustment. Comparing the stability of the slurry under several different viscosities prepared by the A1 formula, it can be seen from Fig. 3 that for several kinds of slurry prepared by the A1 formula, when the viscosity of the slurry is 500, 1,500, 3,000 At 4 000 and 6 000 mPa·s, the TSI values ​​of the slurry are 1.55, 1.05, 0.65, 0.36 and 0.21, respectively. As the viscosity increases, the slurry stability increases, that is, within a certain viscosity range. The higher the solid content, the better the stability of the slurry, but the viscosity of the slurry is too large, which is likely to cause scratches during subsequent coating. On the one hand, the appearance of the pole piece is poor, and on the other hand, the lithium ion of the negative electrode is easily caused during the charging process. Therefore, the viscosity of the slurry is selected to be around 4 000 mPa·s, and the solid content is about 46%, which is suitable.

The best partner is: Bolery Viscometer

Brookfield viscometers are commonly used in the manufacturing industry to detect and control product viscosity. Brookfield Viscometers are accurate to ±1% of the measurement range with a reproducibility of ±0.2%. The Brookfield Viscometer provides precise control of viscosity and is an indispensable tool for production and product development.

The Brookfield Viscometer is the world's first viscometer, inventing the world's first rotary viscometer, the first to create a world standard for viscosity measurement. With 80 years of production experience, Brookfield's name has become synonymous with precision in the field of viscosity measurement and control. Brookfield Viscometer has become the industry benchmark for viscometers with a market share of over 70%. The Brookfield Viscometer is stable, reliable, accurate and repeatable. By measuring with a precise Brookfield viscometer, it is precisely controlled to the right viscosity range for maximum performance.

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