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As new‑semester research projects kick off! Tired of performance bottlenecks and inconsistent experimental data from older equipment? The Lab‑Series Generation 2 single‑cell system and test stack from ZH Energy have been officially released. Delivering comprehensive hardware and performance upgrades over the Gen‑1 version, these products help universities and research institutes accelerate their flow‑battery research progress.

Gen2 Upgrade｜Far Beyond Minor Tweaks - Full Renewal of Core Hardware

Two key hardware innovations have been implemented in the Gen2 release: 

• Composite graphite 3D interdigitated flow‑field bipolar plates replace the flat bipolar plates of Gen1. This optimizes electrolyte distribution uniformity, enables full catalytic utilization across the electrode area and reduces electrochemical impedance.

• Graphite‑felt electrode thickness has been reduced from 4.0 mm to 2.5 mm, increasing electrolyte flow velocity inside the electrode and mitigating concentration polarization.

Gen2 Product Portfolio: Single‑Cell System & Test Stack

Gen2 Single‑Cell System (3W / 20W / 100W)

A modular flow‑battery platform designed for laboratory testing, teaching demonstrations and mobile exhibitions:

• Quick‑disassembly design, ideal for frequent disassembly‑assembly research tests. Custom‑fitted base‑tray set ensures stable installation and straightforward operation.

• Optimized flow‑field raises rated‑power energy efficiency from ≥80% to ≥83%.

• Multiple power ratings (3W‑100W) support research from preliminary lab‑scale exploration to performance validation.

• Complete system includes: single‑cell fixture, flow frame, bipolar plate, proton‑exchange membrane, graphite felt, electrolyte reservoir, pump and tubing.

Charge-discharge performance of a 20W single cell at various current densities.

Test conditions: 1.7 M vanadium electrolyte, 50μm-thick perfluorosulfonic acid proton exchange membrane, galvanostatic charge-discharge, ambient temperature of 25 °C.

Gen2 Test Stack (100 W‑5 kW)

Engineered to replicate the structure of commercial‑scale stacks, bridging laboratory‑scale research and industrial validation:

• Engineering‑validated flow‑field optimization maintains high energy efficiency even at high power densities. Rated‑power energy efficiency peaks at 85% for Gen2.

• Line‑surface composite sealing technology effectively eliminates electrolyte leakage, a common pain‑point of research‑grade stacks. Manufactured under ISO 9001 quality standards for excellent stack‑to‑stack consistency.

• Flexible configurations from 100 W to 5 kW via adjustable number of single cells. Compatible with all‑vanadium, iron‑chromium, organic and other flow‑battery chemistries.

• Full kit covers end plates, current collectors, flow frames, 3D flow‑field bipolar plates, proton‑exchange membranes, 2.5mm graphite‑felt electrodes and other core components.
  
  

Charge‑discharge Performance of the 1kW‑Gen2 Stack at Varying Power Densities.

Test Conditions: 1.7M vanadium electrolyte; 40μm perfluorinated sulfonic‑acid proton‑exchange membrane; constant‑power charge‑discharge; ambient temperature of 25 °C.

Experimental Performance

Tests were carried out across a wide power‑density range of 120‑300mW/cm², yielding complete efficiency‑variation curves for coulombic, voltage and energy efficiency. Excellent test‑data repeatability delivers reliable results to support screening of separators, electrolytes and electrode materials.

Exclusive Back‑to‑School Promotion | Free Base & Tray Set with Single‑Cell Purchase

Refresh your research equipment for the new semester with our special offer.

Promotion Terms 

Purchase any single‑cell system (Gen1 or Gen2) during the campaign period and receive a complimentary matching base‑tray set. The set organizes tubing and electrolyte bottles, prevents spillage and overflow, and keeps your lab workspace neat and safe. Users can start experiments right after unboxing and assembly.

Promotion Notes

• Free gift will be shipped together with your equipment. No cash‑back or alternative‑part substitution is available.

• Campaign period: Effective immediately – September 30, 2026. Limited stock, while supplies last.