电子元件与材料2025，Vol.44Issue(1)：33-40,8.DOI:10.14106/j.cnki.1001-2028.2025.1285
正负极配比对镍铁锰酸钠//活性炭(NFM//AC)钠离子电容器性能的影响
The effect of positive/negative capacity ratio on the sodium nickel iron manganese oxide//activated carbon(NFM//AC)sodium ion capacitors
摘要
Abstract
Sodium ion capacitors(SICs)are new energy storage devices emerged in recent years,the energy density of which is higher than that of the electric double layer capacitors(EDLCs)while the power density of which is higher than that of the sodium ion batteries(SIBs),combining the advantages of low cost and long life.Although the development of SICs is still in the primary stage at home and abroad,it has become the academic research hotspot in the field of electrochemical energy storage devices.In this work,the pouched SICs with different positive/negative capacity ratios(P/N ratio)were fabricated with sodium nickel iron manganese oxide(NFM)as the cathode,activated carbon(AC)as the anode and acetonitrile-based electrolyte(NaPF6/CH3 CN).The electrochemical performance of charging/discharging ability,cyclic voltammetry,electrochemical impedance,rate capability,pulse and cycle life were investigated.The results show that the NFM//AC SICs exhibit good capacitive curves behavior in the charging/discharging test.The SIC with P/N ratio of 2.0 displays the smaller resistance and the best comprehensive performance including the higher discharge specific capacity of 39.35 F·g-1 at 0.5-2.3 V,the energy density of 39.45 Wh·kg-1 at the power density of 31.61 W·kg-1,and 19.86 Wh·kg-1 at 5466.73 W·kg-1,the maximum power density obtained in the pulse testing of 34392.45 W·kg-1(based on the mass of active materials)and 7933.04 W·kg-1(based on the weight of SIC).The capacity retention is 97.1%at 34000 cycles under 1.0-2.3 V,which reduces to 80.0%after 20389 cycles under 1.0-2.7 V.关键词
钠离子电容器/活性炭/镍铁锰酸钠/P/N比/功率密度Key words
sodium ion capacitors/activated carbon/sodium nickel iron manganese oxide/P/N ratio/power density分类
动力与电气工程引用本文复制引用
安仲勋,范羚羚,夏恒恒..正负极配比对镍铁锰酸钠//活性炭(NFM//AC)钠离子电容器性能的影响[J].电子元件与材料,2025,44(1):33-40,8.基金项目
上海市"中央引导地方科技发展基金项目"(YDZX20223100003005) （YDZX20223100003005）
