Regenerative Fuel Cells TRIZ Cases

Phosphoric-acid-stabilized vanadium electrolyte prevents V(V) precipitation and maintains conductivity for redox flow battery operation up to 60°C.

Bulk magnetic susceptibility measurement tracks flow battery electrolyte SOC directly, avoiding OCV drift and imbalance errors.

Electrolyte flow drives a turbine-impeller pump to move hydrogen in flow batteries with lower parasitic power, less leakage, and smaller footprint.

Dynamic pump switching in parallel flow battery stacks cuts unnecessary pump power at light loads while maintaining output.

Periodic wash cycles with hydrogen peroxide and deionized water remove electrolyte contaminants, restoring redox flow battery efficiency and life.

Diquaternized bipyridine and water-soluble ferrocene electrolytes improve neutral-pH flow battery stability, solubility, and capacity retention.

Calendered graphite-resin polar plates achieve controllable thinness, higher conductivity, vanadium ion blocking, and enough rigidity for large-area production.

A curved channel-depth transition in separator plates reduces embossing stress, limiting end cracking, thinning, and reject rates.

A polymeric halogen sequestering agent on the membrane confines halogen at the cathode, cutting crossover and self-discharge at lower cost.

S-linked quinone polymers and sulfurized carbon matrices raise cathode capacity while extending battery life and reducing safety hazards.

A dual-zone membrane-to-frame joint combines bonding and local compression to prevent leakage, mixing, and durability loss in cell stacks.

Protruding fluid segments lengthen a uniform shunt channel to improve flow efficiency while limiting electrical current leakage in flow battery cells.

A variable-cross-section curved flow guide enlarges bend regions to cut pressure loss, keep hydraulic resistance low, and reduce shunt currents.

A hermetically bonded membrane-electrode frame cuts electrolyte leakage, removes sealing gaskets, and raises flow battery energy density.

A porous polyolefin substrate with an ion-selective coating cuts flow battery crossover while preserving wet ion transport and membrane durability.

Mild-acid zinc and iron electrolytes replace toxic vanadium and bromine chemistries to improve flow battery safety, cost, and life.

A sulfonated polymer with amide solvent and water controls separator viscosity and thickness, then dries cleanly to protect battery efficiency.

Monitoring electrolyte oxidation states and correcting imbalance helps flow batteries limit self-discharge, preserve capacity, and extend life.

Segmented meandering flow paths with inclined or stepped turn-backs spread electrolyte widely while cutting pressure loss and pump power.

A microporous membrane with hydrophilic ionomer coatings cuts resistance, crossover, and hydrogen evolution in all-iron flow batteries.

PWM charging pulses redox flow batteries below an SOC threshold to cut ohmic losses and raise voltaic and energy efficiency.

Mg and Ca co-salts immobilize water in aqueous iron battery electrolytes, suppressing HER and extending cycle life through higher coulombic efficiency.

Controlling impurity ion levels in vanadium flow battery electrolyte suppresses hydrogen and hydrogen sulfide generation while preserving battery characteristics.

Roll-to-roll calendaring forms a cross-linked separator with molded ribs and an integrated spacer, cutting redox flow battery separator cost and time.

Periodic reverse charging restores pH balance in separated redox flow battery electrolytes and redissolves iron salts without mixing.