电活性生物质诱导下不同形貌二硫化钼基复合材料的可控制备及其电化学性能研究

Electroactive biomass induced controllable preparation and electrochemical properties of molybdenum disulfide-based composites with different morphologies

以钼酸钠、硫脲和电活性生物质(单宁酸和木质素磺酸钠)为原料,通过一步水热法制备二硫化钼(MoS_(2))基纳米材料,并对其形貌和电化学性能进行了研究。结果表明:单宁酸(TA)和木质素磺酸钠(Lig)可作为二硫化钼的形貌调控剂以获得球花状二硫化钼(MoS_(2)-TA)和镂空网络状二硫化钼(MoS_(2)-Lig)纳米材料;所制备的MoS_(2)-Lig和MoS_(2)-TA的比电容值分别为163.6 F·g^(−1)和98 F·g^(−1),明显高于纯MoS_(2)(72 F·g^(−1));镂空网络状的MoS_(2)-Lig不仅拥有更优异的比电容值,还表现出较好的倍率性能和循环稳定性;用电活性生物质材料作为二硫化钼的形貌调控剂能有效提高二硫化钼电化学性能。

Molybdenum disulfide(MoS_(2))-based nanocomposites were prepared by a one-step hydrothermal method using sodium molybdate,thiourea,and electroactive biomass including tannic acid and sodium lignosulfonate as raw materials,and their morphology and electrochemical properties were studied.The results show that tannic acid(TA)and sodium lignosulfonate(Lig)can be used as morphology control agents to obtain spheroidal molybdenum disulfide(MoS_(2)-TA)and hollowed-out network molybdenum disulfide(MoS_(2)-Lig)nanomaterials.The specific capacitance of the prepared MoS_(2)-Lig and MoS_(2)-TA is 163.6 F·g^(−1) and 98 F·g^(−1),respectively,which is significantly higher than that of pure MoS_(2)(72 F·g^(−1)).The hollowed-out reticulate MoS_(2)-Lig not only has better specific capacitance,but also shows better rate performance and cycle stability,and the electrochemical performance of molybdenum disulfide can be effectively improved by using electroactive biomass material as the morphology regulator of molybdenum disulfide.