污泥源腐殖酸基储能材料电化学性能的研究

Electrochemical performance of sludge-sourced humic acid-based energy storage materials

采用3种不同方法从污泥中提取腐殖酸,并通过水热反应与氧化石墨烯合成腐殖酸基复合材料。利用UV-Vis、FT-IR和有机元素分析对腐殖酸结构和元素进行定性分析,并通过电化学测试系统对复合材料的储能性能进行表征。结果表明,3种提取方法均对腐殖酸有富集作用,腐殖酸中大量含氧官能团和N原子的存在可提高离子传输通道的数量和电导率;材料HA2-RGO在电流密度为50 m A/g时表现出高的比电容(148.19 F/g)、更低的电阻、良好倍率性能和出色的循环性能。

Three different methods are utilized to extract humic acid from sludge,and a humic acid-based composite material is obtained through a hydrothermal reaction between humic acid and graphene oxide.UV-Vis,FT-IR and organic element analysis are employed to qualitatively analyze the structure and elements of humic acid,and the electrochemical test system is employed to characterize the energy storage performance of the composite material.It is indicated that these three extraction methods all have an enrichment effect on humic acid.The presence of a large number of oxygencontaining functional groups and N atoms in humic acid can improve ion transport channels and electrical conductivity.The prepared H_(2)-RGO material shows a high specific capacitance(148.19 F·g^(-1))at a current density of 50 m A·g^(-1),and exhibits lower resistance,good rate performance and excellent cycle performance.