首页|Boosting Zn-ion storage capacity of pitch coke-based activated carbon via pre-oxidation assisted KOH activation strategy
Boosting Zn-ion storage capacity of pitch coke-based activated carbon via pre-oxidation assisted KOH activation strategy
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NSTL
Elsevier
Activated carbons (ACs) with unique structure are desired for high-performance of Zinc-ion supercapacitors (ZICs). Herein, a series of ACs were prepared using air pre-oxidation assisted KOH activation technology from pitch coke (PHC). The results show that pre-oxidation promotes the development of pore and the regulation of surface chemical composition of obtained ACs. Based on this experiment, the as-prepared AC-330 delivers suitable oxygen functional groups, high specific surface area of 3223 m(2) g(-1) and high small-sized mesopore (2-4 nm) volume of 0.72 cm(3) g(-1). All these unique structures endow AC-330 with a satisfactory specific capacity of 212.5 mAh g(-1) at 0.1 A g(-1), and it can still remain at 85 mAh g(-1) even when the current density increased up to 20 A g(-1) with an excellent capacity retention of 40%. Fortunately, it can also deliver high energy-power density parameters (170 Wh kg(-1) at 170.4 W kg(-1) and 67.2 Wh kg(-1) at 32.3 kW kg(-1)).
NSTL
Elsevier
