The evolution stage of lithium-ion battery conductive agents ranges from zero-dimensional conductive agent carbon black materials to one-dimensional fiber-like carbon nanotube materials, and then to two-dimensional graphene materials with lamellar structure.   Conductive agent materials are an important part of lithium-ion batteries and play an important role in the electrochemical performance of lithium-ion batteries. After an appropriate amount of conductive agent is added to the electrode, the electron transfer rate inside the electrode can be effectively improved.   Graphene has the advantages of excellent mechanics, optical properties, high thermal conductivity, small resistivity and strong stability. As a new type of lithium battery conductive agent, due to its unique sheet structure (two-dimensional structure), the contact with the active material is a point-surface contact form, which can maximize the role of the conductive agent and reduce the amount of conductive agent, so that more active materials can be used and the capacity of the lithium battery can be improved.   Conductive mechanism  (1) The electronic conductivity is high, and the use of a small amount of graphene can effectively reduce the ohmic polarization inside the battery; (2) The two-dimensional sheet structure, graphene can achieve "surface-point" contact with the active material, and can build a conductive network in the pole piece from a larger spatial span. Realize "long-range conductivity" on the entire electrode ;(3) Ultra-thin characteristics, all carbon atoms on graphene can be exposed for electron transport, high atom utilization efficiency, so it can form a complete conductive network with minimal usage. Improve the energy density of the battery;(4) high flexibility, can be in good contact with the active material, buffer the volume expansion and contraction of the active material during charge and discharge, inhibit the rebound effect of the pole piece, and ensure the good cycle performance of the battery.    The effect as a conductive agent is closely related to the amount of it added. In the case of small addition, graphene is much better than conductive carbon black because it can better form a conductive network. However, graphene with a thicker layer will hinder the diffusion of lithium ions and reduce the ionic conductivity of the electrode (6-9 layers are generally considered to be the most suitable). However, due to its high cost, difficulty in dispersion and hindering lithium ion transmission, it has not been fully industrialized.   Production process  Graphene production process methods mainly include mechanical peeling method, chemical liquid phase stripping method, redox method, chemical vapor deposition method, etc., liquid phase stripping method and redox method have low cost and low purity, suitable for batteries, supercapacitors, conductive coatings and conductive inks.   In the latest research progre...

The performance of lithium-ion battery separator determines the capacity, cycle performance, charge and discharge current density and other key characteristics of lithium-ion batteries, requiring the separator to have the appropriate thickness, ion transmission rate, pore size and porosity and sufficient chemical stability, thermal stability and mechanical stability. At present, the main market application separator for PP, PE, PP/PE/PP and so on. (1) the same wet process, the thickness of the same separator porosity and air permeability value is negatively correlated, the linear fit of 0.9998; porosity, curvature similar diaphragm thickness and air permeability value is positively correlated, the linear fit of 0.9545. (2) The greater the porosity of the wet diaphragm of the same thickness, the smaller the ACR/DCR of the battery; the greater the thickness of the wet diaphragm with similar porosity and curvature, the greater the ACR/DCR of the battery. Dry diaphragm battery ACR/DCR is smaller than the wet diaphragm at the same thickness. (3) wet diaphragm with increased porosity (thickness of the same), the battery's room temperature voltage drop and high temperature physical self-discharge are becoming larger; wet diaphragm with increased thickness (porosity, curvature similar), the battery's room temperature voltage drop and high temperature physical self-discharge are becoming smaller. Dry diaphragm battery room temperature voltage drop and high temperature physical self-discharge are slightly greater than the same thickness of wet diaphragm. (4) -20 ℃ discharge, the same thickness of wet diaphragm porosity is larger, the smaller the capacity retention rate; while porosity, curvature is similar, the thicker the wet diaphragm capacity retention rate. Under the same thickness, the capacity retention rate of dry diaphragm is slightly smaller than that of wet diaphragm. #Glass Fiber Battery Separator for Sodium Ion Battery# For more information, please contact us: Email : tob.amy@tobmachine.com Skype : amywangbest86 Whatsapp/Phone number : +86 181 2071 5609

At the recent 2022 earnings presentation, global power battery leader CATL’s Chairman and General Manager Zeng Yuqun said that CATL's M3P battery is expected to be delivered in mass production this year. Zeng Yuqun said, "In the case of large-scale applications, M3P battery can reduce costs and increase efficiency, low-temperature performance, energy density better than lithium iron phosphate batteries, and cost better than ternary Li-ion batteries. Please see the subsequent release for the application on specific models. In an investor research event in February last year, CATL said for the first time that it planned to launch a new product M3P battery, but this product is not lithium manganese iron phosphate battery to be exact, the battery cathode material also contains other metal elements, which the company calls ternary lithium battery of phosphate system. Last August,CATL chief scientist Wu Kai, who attended the 2022 World Power Battery Conference last year, further explained, "M3P battery can be aimed at mid-range models with a range of about 700km. Previously for models with this range,CATL used medium and low nickel ternary cathode material solutions, which are relatively more costly. Combined with the 'Kirin battery' pack structure, M3P's new material can also meet the needs of such models." Wu Kai said. In an investor research event in February last year,CATL said for the first time that it planned to launch a new product M3P battery, but this product is not lithium manganese iron phosphate battery to be exact, the battery cathode material also contains other metal elements, which the company calls ternary lithium battery of phosphate system. Last August,CATL chief scientist Wu Kai, who attended the 2022 World Power Battery Conference last year, further explained, "M3P battery can be aimed at mid-range models with a range of about 700km. Previously for models with this range,CATL used medium and low nickel ternary cathode material solutions, which are relatively more costly. Combined with the 'Kirin battery' pack structure, M3P's new material can also meet the needs of such models." Wu Kai said. Shenyang Securities research report analysis,CATL M3P battery may be doped with two of the metal elements such as magnesium, zinc, aluminum, etc., in part of the iron element point to form a replacement, thereby generating phosphate system of ternary materials to improve the charge and discharge capacity and cycle stability. For more information, please contact us: Email : tob.amy@tobmachine.com Skype : amywangbest86 Whatsapp/Phone number : +86 181 2071 5609

20kg Lithium battery Anode electrode is shipped to USA We can supply a full set of lithium battery materials, equipment, and we also can supply the coated electrode according to our customer's requirements. Today, we shipped 20kg anode electrode to USA as sample testing, In order to get the best quality electrode, we strictly check the total producing process, and for shipping, we also vacuum package it with wooden case outside. Hope we can cooperate with each other in large quantity in future. For more information, please contact us: Email : tob.amy@tobmachine.com Skype : amywangbest86 Whatsapp/Phone number : +86 181 2071 5609

According to the latest released data, sodium battery production capacity is only 2GWh by the end of 2022, and by the end of 2023, sodium battery production capacity is expected to increase to 21GWh, 950% year-on-year increase. 2023 is the first year of large-scale sodium-ion batteries, a number of listed companies cut into the sodium-ion battery track, CATL recently revealed that this year's sodium-ion battery will be industrialized.Sodium batteries have a good cost advantage, and the total cost of sodium batteries is 30-40% lower than that of lithium batteries. The White Paper on the Development of China's Sodium-Ion Battery Industry (2023) predicts that the actual shipment of sodium-ion batteries will reach 347.0GWh by 2030. The capacity of the hard carbon anode is related to the energy density of sodium-ion batteries, which is the biggest difficulty in the current industrialization of hard carbon. Anode material hard carbon manufacturers have successfully developed high-capacity, high-first-effect hard carbon materials and taken the lead in industrialization. For more information, please contact us: Email : tob.amy@tobmachine.com Skype : amywangbest86 Whatsapp/Phone number : +86 181 2071 5609

A batch of vacuum planetary mixers for the cylindrical lithium battery production line has been completed. They will be packed into 4 containers and sent to the customer's factory. Application fields of lithium battery vacuum planetary mixing machine: fuel cell, power battery, polymer lithium ion battery (LIP), button type lithium battery, lithium iron phosphate battery, electric vehicle battery, lithium power battery, metal hydride nickel battery, mercury-free Alkaline zinc-manganese batteries, lithium (lithium-ion) plastic batteries, electrochemical energy storage supercapacitors, lithium-ion battery slurry. TOB NEW ENERGY LIMITED is specialized in lithium battery industry, our company can provide you a turnkey project, if you are interested in it, feel free to contact us! For more information, please contact us: Email : tob.amy@tobmachine.com Skype : amywangbest86 Whatsapp/Phone number : +86 181 2071 5609

When there is only a low content of CMC in the slurry without SBR, graphite particles agglomerate during the homogenization process and cannot be well dispersed. When the ratio of CMC to graphite is moderate, adding 1.0% to 4.5% of SBR to the slurry will cause SBR to adsorb on the surface of graphite, dispersing the graphite particles and reducing the viscosity and modulus of the slurry. When the amount of CMC is 0.7% to 1.0%, the slurry exhibits viscoelasticity, and continuous addition of SBR will not change the rheological properties of the slurry. Comparing the two mixing methods of adding SBR and CMC simultaneously and adding CMC first and then SBR, the results show that CMC plays a leading role in the dispersion of graphite in the slurry, and CMC preferentially adsorbs on the surface of graphite particles. In general, when the amount of CMC added is very low, the addition of SBR will adsorb on the surface of graphite particles, which has a certain impact on the dispersion of graphite. As the amount of CMC added increases, the amount of adsorption on the surface of graphite also increases, and SBR cannot adsorb on the surface of graphite, thus playing no role in the dispersion of graphite. When a certain amount of CMC is reached, the combined attraction of excess CMC that fails to adsorb on the surface of graphite particles becomes greater than the repulsion, which can lead to agglomeration between graphite particles. Therefore, CMC plays a crucial role in the dispersion of graphite negative electrode slurry. Email :tob.amy@tobmachine.com Skype :amywangbest86 Whatsapp/Phone number :+86 181 2071 5609

Ni-rich Layered Oxide Particle Materials for Lithium-ion Batteries    The cathode material is one of the most critical components of the partial ion battery, and it is determined to deal with the system energy density and cost of the battery on the large grid. Pre-commercial cathode materials can be divided into three categories: Laminated structure Spinel structure Olivine structure Among them, the high nickel layered oxide cathode materials NCM and NCA (LiNixCoyMnzO2, LiNixCoyAlzO2, x + y + z = 1, x ≥ 60%) have high actual specific capacity (≥ 180 mAh/g), high operating potential (~3.7 V vs. Li+/Li) and low cost, thus becoming the focus of academic and industrial attention. hot spot.   For more information, please contact us: Email : tob.amy@tobmachine.com Skype : amywangbest86 Whatsapp/Phone number : +86 181 2071 5609