This paper discusses the electrochemical energy storage and room temperature hydrogen, methane and carbon dioxide adsorption/desorption behaviour of commercial nanoporous activated carbon having a specific BET surface area 1007 m² g⁻¹ and pore volume 0.371 cm³ g⁻¹. The electrochemical energy storage behaviour of activated carbon was determined from its capacitive performance using standard three and two-electrode cells. The specific capacitance (C_S) of the sample determined using a three-electrode cell is 138 F g⁻¹ at 0.1 A g⁻¹ with the capacitance loss of 1% after 2000 charge/discharge cycles. Whereas, C_S determined using a two-electrode cell is 98.8 F g⁻¹ at 0.2 A g⁻¹ with the capacitance loss of 3% after 5000 charge/discharge cycles. The energy and power densities of two-electrode cell supercapacitor is 19.76 Wh kg⁻¹ and 3.77 kW kg⁻¹, respectively. The sample exhibits gaseous uptake capacities of 0.23 wt% H₂, 8.52 wt% CH₄ and 37.25 wt% CO₂ at ~50 atm/293 K.

本文讨论了比表面积为1007 m ²  g ^-1和孔体积为0.371 cm ³  g ^-1的市售纳米多孔活性炭的电化学能量存储和室温下氢，甲烷和二氧化碳的吸附/解吸行为。使用标准的三电极和两电极电池，根据其电容性能确定活性炭的电化学储能性能。使用三电极电池确定的样品的比电容（C _S）在0.1 A g ^-1下为138 F g ^-1，在2000次充电/放电循环后电容损失为1％。而C _S使用两电极电池测得的0.2 A g ^-1下为98.8 F g ^-1，经过5000次充电/放电循环后电容损失为3％。双电极电池超级电容器的能量密度和功率密度分别为19.76 Wh kg ^-1和3.77 kW kg ^-1。0.23％（重量）H的样品表现出气态吸附容量₂，8.52重量％的CH ₄和37.25％（重量）CO ₂在约50个大气压/ 293 K.