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Abstract Tubular porous Co 3 O 4 were hydrothermally synthesized at 120 °C and post-calcined at 500 °C using sorghum straw as biotemplate. The as-obtained porous Co 3 O 4 inherited the… Click to show full abstract
Abstract Tubular porous Co 3 O 4 were hydrothermally synthesized at 120 °C and post-calcined at 500 °C using sorghum straw as biotemplate. The as-obtained porous Co 3 O 4 inherited the morphology and microstructure of sorghum straw. Compared with the bare Co 3 O 4 , the tubular porous Co 3 O 4 exhibited 5-fold enhancement in specific capacitance and excellent charge-discharge cycle stability with the capacitance retention of 90.1% after 9000 cycles at a current density of 2 A/g, attributed to its enhanced specific surface area, more surface electroactive sites and unique microstructure.
Journal Title: Materials Letters
Year Published: 2018
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