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Analysis of the influence of slurry quality on coating surface fluctuation｜‌Lithium battery production process front end (mixing/coating) Lithium battery production process - mixing/coating The production process of lithium batteries varies among different battery manufacturers.  Generally speaking, it is divided into three stages: front, middle and back. 1. Front section: pole piece production (Mixing, coating, tableting, baking, slitting, tableting, tab forming) (Core link: coating) 2. Middle section: battery cell assembly (winding or lamination, pre-packaging of cells (into shells), electrolyte injection, sealing) (Core link: winding) 3. Post-processing (activating the battery cell) (battery cell formation, capacity division, static placement, testing, and sorting) (Core links: formation, volume fractionation, and testing)

Exploring the mixing process of lithium-ion batteries---mixer Understand  the principle of lithium-ion battery mixing equipment in one article

Found the culprit!  --  Stanford University EES reveals: the fundamental reason for the difference in Coulombic efficiency of high-performance lithium metal battery electrolytes!                    Lithium metal batteries are considered ideal energy storage devices due to their high capacity and energy density, but the high activity of lithium limits their commercialization. In recent years, advances in the design of liquid electrolytes have improved the efficiency of lithium metal batteries, but the efficiency improvement has reached a bottleneck, and the reason is still unclear.

Science Bulletin: Carbonate electrolyte releases NO₃⁻ and I⁻ to achieve stable lithium metal batteries!                      The formation of inactive lithium (Li) in lithium metal batteries (LMBs) mainly originates from the undesirable components of the solid electrolyte interface (SEI) and the growth of lithium dendrites. Lithium nitrite (LiNO₃) as an electrolyte additive has shown great potential to alleviate interfacial instability and lithium dendrite growth by in situ constructing a nitride-rich SEI. However, the limited solubility of LiNO₃ in carbonate electrolytes (~0.01 mg mL⁻¹) restricts its practical application.

The "Breathing Technique" in Lithium Battery Baking: Decoding the Core Technology of Nitrogen Cycle Why is nitrogen circulation introduced in the vacuum baking of lithium batteries? The seemingly safe inert gas actually hides the risk of condensation! Behind the efficiency improvement is the ultimate control of the "breathing rhythm" by precision technology - this article deciphers the game logic of nitrogen filling, dehumidification and risk prevention and control. Is it necessary to introduce nitrogen circulation during vacuum baking of battery cells? When filling with nitrogen, the pressure inside the cavity will change. Will the moisture condense again and affect the baking effect?

  Key auxiliary materials in lithium batteries - conductive agents Conductive agent is an important auxiliary material for batteries, and conductive carbon black is the most widely used conductive agent. The main function of conductive agent is to improve the conductivity of batteries. Only a small amount of addition can greatly improve the performance of lithium batteries. Conductive agent products include conductive carbon black, carbon nanotubes, graphene, etc., which are important auxiliary materials for batteries. 1 Why do we need to add conductive agent to lithium batteries? The normal charging and discharging process of lithium batteries requires the participation of lithium ions and electrons. This requires that the electrodes of lithium-ion batteries must be mixed conductors of ions and electrons, and the electrode reaction can only occur at the junction of the electrolyte, conductive agent, and active material. The positive electrode active materials are mostly transitio...

  First author: Meng Li Corresponding author: Boryann Liaw Corresponding Unit: Idaho National Laboratory, USA Achievements at a Glance This study developed a novel non-destructive method to track the remaining amount of active lithium (Li) in lithium-ion batteries, similar to the fuel gauge in a car engine. By converting the theoretical capacity of transition metal oxides into lithium content analysis, the researchers were able to reliably track the lithium content in the electrode and reveal the impact of battery formulation and testing methods on performance. The study found that lithium content tracking was able to reveal stoichiometric changes near the electrode- electrolyte interface compared to capacity analysis. By tracking four key variables from battery formation to end of life, the researchers used a thermodynamic framework to characterize electrode and battery performance. This precise lithium content utilization differential analysis is expected to enable more accurate...

Interfacial friction makes the vertical structure of lithium metal batteries summary A practical high-energy-density lithium metal battery requires a free-standing lithium metal anode with a thickness of less than 20 μm, but it is difficult to achieve large-scale processing of thin layers and free-standing structures due to the low melting point and strong diffusion creep effect of lithium metal. In this study, a free-standing l ithium chips  with a thickness of 5 to 50 μm was formed on the lithium metal surface by mechanical rolling, which was determ ined by the in-situ tribochemical reaction between lithium and zinc dialkyl dithiophosphate (ZDDP). A layer of organic/inorganic hybrid interface (about 450 nm) was formed on the lithium metal surface with extremely high hardness (0.84 GPa) and Young's modulus (25.90 GPa), which not only enables scalable processing of  l ithium chips , but also realizes dendrite-free lithium metal anode by inhibiting dendrite growth. The rolled l...

In-depth! Detailed explanation of lithium-ion battery formation technology Lithium-ion battery production requires formation to achieve electrode wetting and full activation of electrode materials. During the first charge, as lithium ions are embedded in the negative electrode, the electrolyte components undergo a reduction reaction at the negative electrode to form a stable solid electrolyte interface film (SEI film) to prevent irreversible consumption of electrolyte and lithium ions in subsequent cycles. Therefore, this technology is of extraordinary significance to battery performance. The effect of formation directly affects the subsequent performance of lithium-ion batteries, including storage performance, cycle life, rate performance and safety. This article focuses on the technical parameters/methods of formation and its impact on battery performance.

Why do electrodes crack during lithium battery coating? How to solve it? 1. Detailed reasons for the cracking of the pole piece 1. Slurry problem     The slurry viscosity is not suitable:      - Viscosity is too high: The slurry has poor fluidity, making it difficult to spread evenly during coating and prone to cracking.      - Viscosity is too low: The slurry tends to flow, resulting in uneven coating thickness and cracking after drying.    Uneven slurry dispersion:      - Active materials, conductive agents and binders are not fully dispersed, resulting in local stress concentration.      - Agglomerated particles exist in the slurry, forming weak points during coating.