In this study,the catalysis function of Na_(2)CO_(3) to the structural properties of xylan char was well investigated with Na_(2)CO_(3) on,and the electrochemical performance of xylan char as an anode material for sod...In this study,the catalysis function of Na_(2)CO_(3) to the structural properties of xylan char was well investigated with Na_(2)CO_(3) on,and the electrochemical performance of xylan char as an anode material for sodium-ion batteries was tested.The characterization of X-ray microscopy and scanning electron microscopy demonstrated that the morphological structure of xylan char was altered due to the addition of Na_(2)CO_(3) catalyst.The increasement of the Na_(2)CO_(3)/xylan ratio resulted in a slenderization of the triangular prism shape of the char skeleton and a reduction in porosity.X-ray diffraction analysis revealed that Na_(2)CO_(3) promoted the growth of the(004)crystal plane of graphite during xylan pyrolysis,while inhibiting the formation of the(100/101)crystal planes.Raman spectroscopy analysis indicated that the presence of Na_(2)CO_(3)had changed the graphitization degree of xylan char.Electrochemical tests further showed that char prepared with a Na_(2)CO_(3)/xylan mass ratio of 1∶1 exhibited the highest sodium storage capacity.This study provides a pathway for the rational design carbon materials derived from xylan for future applications in energy storage devices.展开更多
基金supported by the Foundation Project of Jihua Laboratory(X200191TL200).
文摘In this study,the catalysis function of Na_(2)CO_(3) to the structural properties of xylan char was well investigated with Na_(2)CO_(3) on,and the electrochemical performance of xylan char as an anode material for sodium-ion batteries was tested.The characterization of X-ray microscopy and scanning electron microscopy demonstrated that the morphological structure of xylan char was altered due to the addition of Na_(2)CO_(3) catalyst.The increasement of the Na_(2)CO_(3)/xylan ratio resulted in a slenderization of the triangular prism shape of the char skeleton and a reduction in porosity.X-ray diffraction analysis revealed that Na_(2)CO_(3) promoted the growth of the(004)crystal plane of graphite during xylan pyrolysis,while inhibiting the formation of the(100/101)crystal planes.Raman spectroscopy analysis indicated that the presence of Na_(2)CO_(3)had changed the graphitization degree of xylan char.Electrochemical tests further showed that char prepared with a Na_(2)CO_(3)/xylan mass ratio of 1∶1 exhibited the highest sodium storage capacity.This study provides a pathway for the rational design carbon materials derived from xylan for future applications in energy storage devices.
