Negative electrode binder performance requirements, test methods and failure mechanisms!

Binders have a low mass ratio in the electrode and do not participate in the electrochemical reaction. Their main function is to adhere the active material and the conductive agent to the current collector to keep the electrode intact . Binders affect the formation of the solid electrolyte interface (SEI) , the charge transfer inside the electrode and between the electrode - electrolyte interface , the wetting behavior of the electrode, and the cycle performance and cost of the battery .

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)

Introduction to lithium battery production process, process flow, principle, formula, and parameters

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.

Zhou Haoshen from Nanjing University and Chang Zhi from Central South University, "Nature Commun.: A new approach to improving the performance of high-voltage lithium metal batteries!

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.