MSE PRO Glovebox Compatible 500mL Compact Dual-Shaft Lab Scale Planetary Vacuum Mixer

MSE PRO Glovebox Compatible 500mL Compact Dual-Shaft Lab Scale Planetary Vacuum Mixer

500ml Compact Dual-Shaft Lab Scale Planetary Vacuum Mixer

A benchtop planetary vacuum mixer for anode and cathode electrode slurry preparation, combining dual-shaft high-shear agitation with a built-in -0.08 MPa vacuum system for bubble-free, homogeneous slurry in a single sealed cycle.

Product Overview and Ideal Applications

MSE PRO Glovebox Compatible 500mL Compact Dual-Shaft Lab Scale Planetary Vacuum Mixer is a benchtop dual-shaft planetary vacuum mixer designed specifically for small-batch electrode slurry preparation in battery R&D. Unlike a generic overhead stirrer or a simple magnetic mixer, this machine combines high-speed dual-axis agitation with a built-in vacuum system, achieving both thorough dispersion of active materials and elimination of air bubbles within a single enclosed cycle.

In a typical battery lab, you weigh out cathode powder (NMC, LFP, LCO), carbon black, and PVDF binder, load them into the 500 ml stainless-steel tank, and after 20 to 60 minutes of programmed mixing under vacuum, you get a smooth, bubble-free slurry ready for coating. Because the tank is sealed and vacuum is pulled to –0.08 MPa, there's no need to transfer the slurry to a separate degassing unit — the mixer handles it all. This saves a step and reduces the risk of moisture pickup, which is critical when processing moisture-sensitive high-nickel cathode materials.

Ideal for:

• University and corporate battery R&D labs that need to prepare 10–100 g batches of electrode slurry with high repeatability.
• Process engineers developing new slurry formulations and seeking to mimic large-scale planetary mixing on a bench scale.
• Pilot lines that require quick turnaround of small test batches without investing in a full-size production mixer.
• Any researcher who has struggled with a half-gelled, air-entrained mixture and wants a more robust solution.

Where the Mixer Fits in Battery Electrode Manufacturing

MSE PRO Glovebox Compatible 500mL Compact Dual-Shaft Lab Scale Planetary Vacuum Mixer operates at the very front of the electrode manufacturing chain — it sits right after the weighing and dry-blending of active material, conductive carbon, and binder. Its output is a homogeneous slurry that is directly fed to a film coater (such as a doctor blade or slot-die coater) to produce cathode or anode sheets. After coating, the sheets are dried, calendared, and slit before cell assembly.

The quality of the mixing stage heavily determines the final electrode's microstructure and, ultimately, the cell's capacity and cycling stability. Poor mixing leads to agglomerates that cause coating streaks, uneven binder distribution that results in electrode delamination, and entrapped air that forms micro-voids in the dried film. The vacuum environment in the BR0409 addresses the air-entrapment problem directly, while the dual-shaft planetary motion ensures that even high-viscosity slurries (such as those with high solid content or nano-silicon anodes) are thoroughly sheared and dispersed.

Process Optimisation Best Practices

Staged mixing: use the multi-segment function — a low-speed pre-mixing (100–150 rpm) for 5–10 minutes to homogenize dry powders under vacuum, then ramp to 1000 rpm for high-shear dispersion, and finally a low-speed degassing stage for 5 minutes. This sequence significantly reduces air re-entrapment.

Fill ratio: do not fill the 500 ml tank to the brim. Aim for 40–60% loading (200–300 g of slurry) to give the dual shafts enough free space for the planetary motion to develop the required vortex.

Binder addition timing: for NMP-based PVDF systems, dissolve PVDF in NMP first, then add carbon black and mix until fully dispersed, and only then add the active material. This “solution-first” method prevents binder swelling in local spots.

Vacuum monitoring: keep an eye on the vacuum gauge. If the vacuum drops (pressure rises) during mixing, it could indicate a leak or that volatile moisture is being drawn out of the powder. Re-tighten the lid clamp or extend the vacuum pump-down time at the start.

How the Planetary Vacuum Mixer Works

MSE PRO Glovebox Compatible 500mL Compact Dual-Shaft Lab Scale Planetary Vacuum Mixer uses a dual-shaft planetary mechanism: two helical impellers rotate on their own axes while simultaneously revolving around the tank center. This creates a complex three-dimensional flow pattern that constantly scrapes material from the tank walls and bottom, directing it into the high-shear zone between the impellers. For a 500 ml batch, dry powder and binder transform into a uniform slurry within 15–20 minutes, with a visibly smooth surface and no dry clumps.

The built-in vacuum pump, reaching –0.08 MPa, is connected directly to the mixing chamber. As it evacuates air, bubbles trapped inside agglomerates or generated during the wetting of powders are drawn out through the slurry surface. Because the tank is completely sealed, degassing happens in parallel with mixing, not afterwards, giving the slurry a dense, bubble-free consistency.

Control logic

The mixer allows programming of several speed-time segments, for example:

• Segment 1: 120 rpm for 5 min (initial wetting)
• Segment 2: 500 rpm for 20 min (high-shear dispersion)
• Segment 3: 200 rpm for 5 min (final homogenisation)

A digital timer (up to 600 minutes) automatically stops the process when the program ends. Because the speed is continuously adjustable up to 1000 rpm, you can dial in the exact shear rate needed to break down carbon agglomerates without damaging fragile active material particles — a common concern when mixing delicate silicon anode powders or nano-sized LFP.

Key Engineering Advantages

–0.08 MPa Built-In Vacuum — Bubble-Free Slurry: an integrated vacuum pump removes moisture and surface-adsorbed gases before solvent addition and eliminates microscopic air bubbles during mixing, producing a denser electrode with fewer pinhole defects.

Dual-Shaft Planetary Agitation for High-Viscosity Slurry: two off-axis helical impellers continuously scrape the inner surface while creating a vigorous vortex, achieving uniform dispersion for slurries up to 8,000–15,000 mPa·s without a separate high-shear disperser. Co-rotation and counter-rotation modes can be selected.

Programmable Multi-Segment Speed: custom speed-time profiles let you mimic step-wise dispersion used in large-scale production and build a scalable recipe.

500 ml Stainless-Steel Tank: ideal for standard lab-scale electrode trials — enough slurry for 10–20 small-format electrode sheets or a few pouch cells. Removable, easy to clean, and resistant to NMP and other common battery solvents.

Robust Bracket and Safety Design: a sturdy bracket keeps the impellers aligned during high-speed operation, and the machine will not start unless the lid is securely clamped. Compact footprint (330 × 320 × 570 mm) and 35 kg weight allow placement on a standard lab bench.

Notes: the mixer is designed for battery electrode slurry and can handle solvents such as NMP and water. For aqueous slurries (e.g., graphite-water-CMC-SBR), ensure thorough cleaning to avoid corrosion.