HIGH-VOLTAGE AND HIGH-CAPACITANCE ACTIVATED CARBON AND CARBON-BASED ELECTRODES

摘要

A positive electrode for an energy storage device includes a first activated carbon material comprising pores having a size of ≦1 nm, which provide a combined pore volume of >0.3 cm3/g, pores having a size of >1 nm to ≦2 nm, which provide a combined pore volume of ≧0.05 cm3/g, and <0.15 cm3/g combined pore volume of any pores having a size of >2 nm. A negative electrode for the energy storage device includes a second activated carbon material comprising pores having a size of ≦1 nm, which provide a combined pore volume of ≦0.3 cm3/g, pores having a size of >1 nm to ≦2 nm, which provide a combined pore volume of ≧0.05 cm3/g, and <0.15 cm3/g combined pore volume of any pores having a size of >2 nm. The total oxygen content in at least the first activated carbon material is at most 1.5 wt. %.

主权项

1. An energy storage device comprising:
a positive electrode comprising a first activated carbon material and a negative electrode comprising a second activated carbon material, wherein the first activated carbon material comprises pores having a size of ≦1 nm, which provide a combined pore volume of >0.3 cm3/g; pores having a size from >1 nm to ≦2 nm, which provide a combined pore volume of ≧0.05 cm3/g; and <0.15 cm3/g combined pore volume of any pores having a size of >2 nm; the second activated carbon material comprises pores having a size of ≦1 nm, which provide a combined pore volume of ≦0.3 cm3/g; pores having a size from >1 nm to ≦2 nm, which provide a combined pore volume of ≧0.05 cm3/g; and <0.15 cm3/g combined pore volume of any pores having a size of >2 nm; and the first activated carbon material has a total oxygen content of at most 1.5 wt. %.