以纳米纤维素为黏结剂的多孔Co 3O 4电极材料的制备及性能  

Preparation and Properties of Porous Co 3O 4 Electrode Materials with Nanocellulose as Binder

作　　者：肖立东 邢思豪 杨帅[1] 李锦涛 黄占华[1] Xiao Lidong;Xing Sihao;Yang Shuai;Li Jintao;Huang Zhanhua(Northeast Forestry University,Harbin 150040,P.R.China)

机构地区：[1]东北林业大学,哈尔滨150040

出　　处：《东北林业大学学报》2020年第10期95-99,108,共6页Journal of Northeast Forestry University

基　　金：国家重点研发计划课题(2017YFD0600204);黑龙江省杰出青年基金项目(JQ2009C001);校级大学生创新创业训练项目(201810225408)

摘　　要：以纳米纤维素(NFC)作为生物质基黏结剂,以金属有机框架ZIF-67前驱体热分解制备的多孔Co3O4(PCP)作为活性成分,制备了NFC/PCP复合电极材料。采用TEM、XRD和XPS手段对PCP的物化结构进行表征,探究了NFC与PCP不同复合比例对NFC/PCP复合电极的电化学性能影响。结果表明:PCP在高温煅烧后,仍然保留着ZIF-67的多面体形状,具有较大的比表面积(44.9 m 2/g)。NFC作为黏结剂不仅具有良好的黏附力而且促进离子扩散,从而提高其电化学性能。NFC/PCP-1(NFC含量为10%)复合电极具有更大的比电容,在扫描速率为5 mV/s时,比电容为421.8 F/g,在电流密度为5 A/g下,循环充放电2000次后,电容保留率仍可达94.98%。NFC/PCP composites electrode was prepared,whose nanocellulose(NFC)was used as a biomass-based binder,and metal-organic framework ZIF-67 was used as a precursor to prepare porous Co3O4(PCP)as the active ingredient by thermal decomposition.The physical-chemical structure of PCP was characterized by means of TEM,XRD and XPS,and the electrochemical performance of NFC/PCP composite electrode was investigated by exploring the influence of different composite ratios of NFC and PCP.Results showed that the crystal of PCP still retained the ZIF-67 polyhedral shape after high temperature calcinations with large specific surface area(44.9 m 2/g).NFC as binder not only has good adhesion but also can facilitate the diffusion of the electrolyte ions,thus improving the electrochemical performance of NFC/PCP composite electrode.NFC/PCP-1 composite electrode has the larger specific capacitance when the content of NFC was 10%.When the scanning rate was 5 mV/s,the mass specific capacitance was 421.8 F/g.At a current density of 5 A/g,the capacitance retention rate of the NFC/PCP-1 composite electrode can reach 94.98%after 2000 charge/discharge cycles.

关 键 词：ZIF-67 多孔Co3O4多面体 生物质基黏结剂 纳米纤维素 电极材料 

分 类 号：TB333[一般工业技术—材料科学与工程]