Key Laboratory of Bio-based Material Science and Technology, Ministry of Education, Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China.
Key Laboratory of Bio-based Material Science and Technology, Ministry of Education, Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China.
Int J Biol Macromol. 2020 Nov 1;162:310-319. doi: 10.1016/j.ijbiomac.2020.06.169. Epub 2020 Jun 20.
CuS/ZnS/sodium alginate/reduced graphene oxide nanocomposites (CZSrG) were prepared by physical crosslinking followed by one-step reduction and were justified as green binder-free hydrogel high-capacitance electrodes. The physical crosslinking was realized simply through the hydrogen-bond interaction between sodium alginate (SA) and graphene oxide (GO), avoiding the usage of traditional Ca crosslinking agent. The hydrogel structure made of CZSrG possessed the most beneficial effect of avoiding large volume change and increasing cycle stability for supercapacitors. When used as electrode, the specific capacitance of CZSrG was 992 F·g (10 mV·s) in a three-electrode system. Furthermore, the fabricated supercapacitors had a specific capacitance of 252.1 F·g (5 mV·s), and a power density of 1800 Wh·kg at the energy density of 2.05 Wh·kg. Thus, the CZSrG has a favorable electrochemical performance and wide application prospects in supercapacitors.
CuS/ZnS/海藻酸钠/还原氧化石墨烯纳米复合材料（CZSrG）通过物理交联随后一步还原制备，并被证明是一种绿色无粘合剂的水凝胶高容量电极。物理交联是通过海藻酸钠（SA）和氧化石墨烯（GO）之间的氢键相互作用简单实现的，避免了使用传统的 Ca 交联剂。由 CZSrG 组成的水凝胶结构对避免超级电容器的大体积变化和增加循环稳定性具有最有益的效果。当用作电极时，在三电极系统中，CZSrG 的比电容为 992 F·g（10 mV·s）。此外，所制备的超级电容器在能量密度为 2.05 Wh·kg 时具有 252.1 F·g（5 mV·s）的比电容和 1800 Wh·kg 的功率密度。因此，CZSrG 在超级电容器中具有良好的电化学性能和广阔的应用前景。
