CAJ | 학술논문

采用水热合成和煅烧制备氧化钴／碳（Co3 O4／C）复合材料，通过 SEM 、XRD 、N2吸附实验等对该材料进行表征．制备的 Co3 O4／C 复合材料为5μm 大小，孔径约为30 nm 的多孔球形结构．在6 mol／L 的氢氧化钾溶液中进行电化学测试畅结果表明，Co3 O4／C 复合材料具有良好的电容性能．在电流密度为1 A ／g 时，比电容为143 F／g ．此外，Co3 O4／C 复合材料还表现出良好的循环稳定性，在1 A ／g 的电流密度下，充放电循环1000次后，比电容保持率为77．8％．
채용수열합성화단소제비양화고／탄（Co3 O4／C）복합재료，통과 SEM 、XRD 、N2흡부실험등대해재료진행표정．제비적 Co3 O4／C 복합재료위5μm 대소，공경약위30 nm 적다공구형결구．재6 mol／L 적경양화갑용액중진행전화학측시창결과표명，Co3 O4／C 복합재료구유량호적전용성능．재전류밀도위1 A ／g 시，비전용위143 F／g ．차외，Co3 O4／C 복합재료환표현출량호적순배은정성，재1 A ／g 적전류밀도하，충방전순배1000차후，비전용보지솔위77．8％．
The spherical porous cobalt oxide/carbon (Co3 O4 /C) composite material was prepared via hydro‐thermal synthesis and calcination .The structure of the as‐synthesized Co3 O4 /C was characterized by scanning e‐lectron microscopy (SEM ) ,X‐ray diffraction (XRD) and N2 sorption measurements .Structure characterizations showed that high crystalline Co3 O4 /C composite material had average size of 5 μm and pore size in the range of 30 nm .The electrochemical capacitive properties of Co3 O4 /C in 6 mol/L KOH solution were investigated by cy‐clic voltammetry (CV ) , chronopotentiometry and electrochemical impedance spectroscopy (EIS ) measure‐ments .The results showed that Co3 O4 /C composite material had good capacitive performance with specific ca‐pacitance of 143 F/g at a current density of 1 A/g .The capacity retention was 77 .8% after 1000 cycles at a cur‐rent density of 1 A /g .