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Tesla Dry Electrode Technology Accelerates the Transformation of Lithium Battery Industry,Which Has A Huge Driving Effect on The Global Demand for PTFE

wallpapers News 2020-04-10
To reduce its dependence on suppliers, Tesla has been seeking independent research and development of new batteries. It is expected that relevant information on the battery technology route adopted will be announced at the battery investor meeting in April. Tesla previously acquired Maxwell in early 2019, and the company's CEO Musk believes that its dry electrode technology will likely have a significant impact on the lithium battery cell industry; besides, based on the company's internal Jeff Dahn research team in high-nickel cobalt-free cathode materials and related The technical reserves in the field of organic electrolyte additives, Tesla may not come from the direction of battery production may be: "Taking high nickel batteries as the technical route, through the acquisition of Maxwell's dry electrode technology and the ion proposed by SiILion (may be acquired) The high-energy battery technology of liquid + high nickel NCM, and the improvement of electrolyte additives as a technical means, eventually reached the direction of cobalt-free batteries. "
Founded in 1965, Maxwell is a contract R & D service provider of US government agencies. It mainly develops and produces energy storage and power transmission products. The main products include super capacitors and high-voltage capacitors. Super capacitors are automobiles, heavy transportation, and renewable energy (wind And solar energy), backup energy, wireless communications, consumer and industrial electronics and other industries provide energy storage and transmission solutions, high-voltage capacitors are used to ensure the safety and reliability of power facilities and other applications.
Maxwell has the core technology of the dry electrode. The difference between the dry electrode and traditional lithium battery process is mainly reflected in the manufacture of electrode pads. In essence, traditional electrode pad manufacturing uses a solvent NMP / MNP with a binder material and mixed with negative or positive electrode powder. The slurry is coated on the electrode collector and dried, which is a wet process. In dry battery technology, instead of using a solvent, a small amount (about 5-8%) of excellent powdered PTFE binder is mixed with the positive and negative electrode powders. Then a thin electrode material belt is formed by an extruder, and then the electrode material belt Laminated onto the metal foil collector to create the finished electrode.
Maxwell dry electrode technology can be expanded from the field of super capacitors to other batteries, such as lithium batteries. In 2018, Maxwell scientist Hieu Duong and others disclosed Maxwell's advanced coating technology in the article "Dry Electrode Coating Technology": "Different from the traditional slurry casting wet coating electrode, Maxwell's dry battery electrode technology has a significant high Load capacity and can produce thick wires, which can be used in high energy density batteries without affecting physical and electrochemical performance. Maxwell's dry battery electrodes have better discharge rate capabilities than wet coated wires. Maxwell produces reliable cables. The roll-shaped self-supporting dry-coated electrode film (with excellent long-term electrochemical cycling performance) demonstrates the scalability. It has built a sizeable soft-pack battery prototype with a capacity higher than 10 Ah. "
In the traditional wet process, the thermal decomposition performance of the binder PVDF has caused difficulties in high nickel, silicon carbon, and supplementary lithium technologies, which has hindered the rapid development of lithium batteries to a certain extent. The new binder PTFE used in the dry electrode technology is expected to replace PVDF (wire), SBR (cable), and NMP (solvent) in the wet process. The chemical inertness of PTFE further solves the safety of high nickel without a solution. In the future, the large-scale penetration of dry electrode technology in the field of lithium batteries will bring the widespread application of PTFE. Measured by the 3,000 tons of positive and negative electrode materials required at 1Gwh, it is calculated according to the 5% -10% PTFE addition amount, and roughly 200 tons of PTFE is needed. According to South Korean SNE Research data, global lithium-ion power battery shipments will reach 116.6GWh in 2019. Even if the rapid growth of pure electric vehicle consumption in the future is not considered, assuming that dry electrode technology will subvert the wet electrode process in the future, it corresponds to 2.33 10,000 tons of PTFE demand. Maxwell dry electrode technology is expected to accelerate the transformation of the lithium battery industry and have a substantial pulling effect on the global market for PTFE.
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