Thick electrodes for electrochemical cells

The invention discloses a thick electrode for an electrochemical cell. The present disclosure relates to high capacity (e.g., area specific capacity greater than about 4 mAh/cm2 to less than or equal to about 50 mAh/cm2) electrodes for electrochemical cells. An exemplary electrode may include a current collector (e.g., a mesh current collector) and one or more electroactive material layers having a thickness of greater than about 150 m to less than or equal to about 5 mm. The electroactive material layers may each comprise lithium ferromanganese phosphate (LiMnxFe1-xPO4, wherein 0 < = x < = 1) (LMFP). The electrode may further include one or more electronically conductive adhesive layers disposed between the current collector and the electroactive material layer. The adhesive layer may include one or more polymer components and one or more conductive fillers. The electroactive material layer may be a gradient layer in which a sub-layer closer to the current collector has a lower porosity than a layer farther from the current collector.