▎ 摘　　要

NOVELTY - The thermocell (100) has a first electrode (102), a second electrode (104) and a redox electrolyte (106). A portion of the first electrode and the second electrode is coated with graphene, and the temperature difference between the first electrode and the second electrode is in the range of 40-80 degrees C. The redox electrolyte is sandwiched between the first electrode and the second electrode. The redox electrolyte is potassium ferricyanide solution. The temperature difference between the first electrode and the second electrode is 50 degrees C. USE - Graphene based thermocell for use in energy harvesting device (claimed). ADVANTAGE - The electrode material is economical, and enables improved charge transfer rates and has low overpotential values. The charge transfer rates are improved and the internal resistances of the thermocell are lowered. The performance of the thermocell is improved by reducing the overpotential. The energy efficiency of the thermocells is improved. The carbon nanomaterials based electrodes in thermocells offer benefits of fast redox processes, high thermal and electrical conductivities, high gravimetric surface area and higher energy conversion efficiency. The graphene thermocell is relatively cost-effective than platinum based electrodes, and has improved performance and energy efficiency. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) an energy harvesting device; and (2) a method for manufacturing a graphene based thermocell. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the thermocell. Thermocell (100) First electrode (102) Second electrode (104) Redox electrolyte (106)