自模板构筑马尾藻基活性炭及其电化学性能  

Self-templated construction of sargassum-based activated carbon and its electrochemical properties

作　　者：景鹏虎 李诗杰 谭霄鹏 李辉 JING Penghu;LI Shijie;TAN Xiaopeng;LI Hui(School of Thermal Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]山东建筑大学热能工程学院,济南250101

出　　处：《材料工程》2025年第4期194-202,共9页Journal of Materials Engineering

基　　金：山东省自然科学基金项目(ZR2019PEE002);中国博士后科学基金项目(2020M671983);山东建筑大学博士科研基金项目(XNBS1838)。

摘　　要：以马尾藻为原料,ZnCl_(2)为活化剂,基于自模板构筑“蛋壳”式结构进行正交实验,研究在不同浸渍比、浸渍时间、活化温度、活化时间下制备马尾藻基活性炭的最佳工艺条件。采用N2吸-脱附、SEM、XRD考察活性炭的孔结构特性、表面形貌和晶体结构,并对马尾藻基活性炭进行电化学性能测试。通过正交实验法分析得到,制备高比电容活性炭的最佳工艺条件为:浸渍比3、浸渍时间2 h、活化温度700℃、活化时间2 h。在9组实验条件下,所制备活性炭SAC7的电化学性能最佳,当电流密度为0.5 A/g时,活性炭SAC7的比电容高达136.4 F/g,当电流密度为5 A/g时,其比电容也达到了92.0 F/g,显示出良好的比电容性能和倍率性能;且经过10000次循环充放电后,仍有高达99.41%的电容保持率,具有极佳的循环稳定性。Orthogonal experiments have been carried out to study the optimal process conditions for the preparation of sargassum-based activated carbon with different impregnation ratios,impregnation times,activation temperatures,and activation times based on the self-templated“egg-box”structure using sargassum as the raw material and ZnCl_(2)as the activator.The characterization of N2 adsorption,SEM,and XRD investigate the pore structure properties,surface morphology,and crystal structure of the activated carbon.The electrochemical properties of sargassum-based activated carbon are tested.The optimum process conditions for preparing high specific capacitance activated carbon are analyzed by orthogonal experimental method and obtained as follows:impregnation ratio is 3,impregnation time is 2 h,activation temperature is 700℃,and activation time is 2 h.Under nine sets of experimental conditions,the prepared activated carbon SAC7 exhibits the best electrochemical performance,the specific capacitance of activated carbon SAC7 is as high as 136.4 F/g when the current density is 0.5 A/g,and its specific capacitance is as high as 92.0 F/g when the current density is 5 A/g,which shows a superior specific capacitance and rate performance.After 10000 cycles of charging and discharging,the SAC7 still has a capacitance retention rate as high as 99.41%,with excellent cycling stability.

关 键 词：自模板构筑 活性炭 ZnCl_(2) 电化学 超级电容器 

分 类 号：TB34[一般工业技术—材料科学与工程] TQ150[化学工程—电化学工业]