Cellulose and Paper Department, National Research Centre, 12622, Egypt.
Electrochemistry and Corrosion Laboratory, National Research Centre, Dokki, 12622, Cairo, Egypt..
Int J Biol Macromol. 2022 Oct 1;218:420-430. doi: 10.1016/j.ijbiomac.2022.07.117. Epub 2022 Jul 22.
Electrochemical conductive hydrogels are being extensively explored in the fabrication of portable batteries and high-performance supercapacitors. Herein, the rational design of a new polyanionic electrically conductive hydrogels based on sodium alginate-g-poly(AM-co-ECA-co-AMPS) are described. rGO was incorporated into the hydrogel during the polymerization process generating rGO@ sodium alginate-g-poly(AM-co-ECA-co-AMPS) composite hydrogels to study the impact of rGO on the performance of the hydrogels. FT-IR, XRD, and SEM-EDX characterized the chemical composition, crystalline, and morphological structure of the new synthesized hydrogels. The electrochemical performance of as-synthesized hydrogels was investigated by cyclic voltammetry, galvanostatic, charge-discharge rate, and electrochemical impedance spectroscopy. The supercapacitor performance for ECH2.5 composite hydrogel showed a capacitance of 753 F. g at 1 A. g with good rate capability and cycling stability up to 5000 cycles. Thus, ECH2.5 hydrogel is a good candidate as electrode material in supercapacitor applications.
电化学导电水凝胶在便携式电池和高性能超级电容器的制造中得到了广泛的研究。在此，描述了一种基于海藻酸钠-g-聚（AM-co-ECA-co-AMPS）的新型聚阴离子导电水凝胶的合理设计。在聚合过程中加入 rGO 生成 rGO@海藻酸钠-g-聚（AM-co-ECA-co-AMPS）复合水凝胶，以研究 rGO 对水凝胶性能的影响。FT-IR、XRD 和 SEM-EDX 对新合成水凝胶的化学组成、结晶和形态结构进行了表征。通过循环伏安法、恒电流、充放电率和电化学阻抗谱研究了合成水凝胶的电化学性能。ECH2.5 复合水凝胶的超级电容器性能在 1 A. g 时表现出 753 F. g 的电容，具有良好的倍率性能和循环稳定性，可达 5000 次循环。因此，ECH2.5 水凝胶是超级电容器应用中电极材料的良好候选材料。
