Electrochemical devices depend on heterogeneous electrochemical reactions carried out on planar surfaces  over which the electrolyte is circulated and uniform  distribution of the electro-active species through the  reaction zone improves the discharge energy efficiency  of these electrochemical devices. The major limitations of  these electrochemical devises include:

• Maldistribution/uneven distribution of reactant fluids,
• heavy pressure drop leading to heavy energy loss,
• poor velocity, unwanted bypassing & channel blockage
• regions of low through flow at the electrode.

Hence there is a need to develop an improved method to  overcome above-mentioned issues.

An electrochemical cell with serpentine flow field,  wherein the entire flow field is divided into multiple  independent segments with the individual entry/exit  streams extending between a common inlet manifold  and a common outlet manifold, characterized in:

1. The serpentine flow field is a flip-flop  serpentine flow field;
2. The direction of the electrolyte flow in the  porous electrode associated with adjacent  segments of said flow field is opposite, &  the direction of the electrolyte flow in the  porous electrode associated with  alternate segments of said flow field is  the same; Creating a flip flop  characteristic between each segment of  said flow field;
3. Said segments comprising of ribs of  varying widths at various points of the  said flow
4. Each segment having same serpentine path  length within the flow field so as to  maintain uniform flow split among the  segments.

• The flow field comprises parallel serpentine channels of equal length except at locations where wider ribs are provided.
• The ribs of varying widths are provided at locations near the entry and exit of each serpentine flow field segment.
• The ribs located at the entry and the exit of the serpentine flow field segments are wider than the ribs located at other points of the  serpentine flow field segments.

FIG 1 illustrates a schematic arrangement of flow path in the flip-flop serpentine flow field.

FIG 2 illustrates bar graphs showing relative  performance for an operating current density of 90  mA/cm² and flow rate of 0.62 ml/min/cm² of four  serpentine flow fields.