Method of making an electrode structure and a microbattery cell

An electrode structure for a rechargeable microbattery cell comprises a patterned current collector having a trench therein. The trench comprises a predetermined 2D shape and depth, and an electrode is disposed within the trench. The electrode has the predetermined 2D shape. The trench may comprise a surface roughness of from about 0.001 mm to about 0.1 mm. A method for manufacturing an electrode structure for a rechargeable microbattery cell comprises forming a trench having a predetermined 2D shape and depth in a conductive substrate, thereby creating a patterned current collector. One or more surfaces of the trench may be roughened. The trench is filled with an electrode formulation to form an electrode. An electrode structure comprising the electrode having the predetermined 2D shape in the patterned current collector is thereby created.