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Effects of silver nanoparticle on electrochemical performances of poly(o-phenylenediamine)/Ag hybrid composite as anode of lithium-ion batteries
Journal of Solid State Electrochemistry ( IF 2.5 ) Pub Date : 2020-04-06 , DOI: 10.1007/s10008-020-04580-8
Chang Su , Bing Han , Jiaojiao Ma , Pengju Guo , Lihuan Xu

Abstract

In the present work, the poly(o-phenylenediamine)/Ag (PoPD/Ag) hybrid composite with the microrod morphology was prepared by in situ chemical oxidation method, and then composite electrodes of PoPD/Ag (PVDF) and PoPD/Ag (sodium alginate) were prepared by using PVDF and sodium alginate as electrode binders, respectively. As explored as the anode of lithium ion batteries, the redox-active PoPD in the hybrid composite, compared to the pure PoPD, demonstrated the remarkably improved electrochemical performances with superior high capacity and good rate capability and cycling stability, due to the improved intrinsic electrical conductivity of PoPD via the introduced Ag nanoparticles in the polymer. As the sodium alginate was chosen as the functional electrode binder, PoPD/Ag (sodium alginate) exhibited the initial charge/discharge-specific capacity of 1452.9/2317.7 mAh g−1, and after the 100th cycles, the developed discharge capacity for PoPD/Ag (sodium alginate) reached to 1389.9 mAh g−1, which was evidently higher than that of PoPD. Its stable and representative discharge-specific capacities were 1291, 1044.9, 856.7, 762.5 mAh g−1 at the current rate of 50, 100, 200, and 500 mAh g−1, respectively, which were obviously superior to that of PoPD and PoPD/Ag (PVDF), indicating that sodium alginate as binder has the special effects on the electrochemical characteristics of PoPD, which benefited to the capacity release step by step during the charge/discharge process. The works would provide significant exploration for the preparation of high-performance poly (aromatic amine) polymer as the electrode materials.



中文翻译:

银纳米颗粒对聚(邻苯二胺)/银杂化复合材料锂离子电池阳极电化学性能的影响

摘要

本文采用原位化学氧化法制备了具有微棒形态的聚邻苯二胺/ Ag(PoPD / Ag)杂化复合材料,然后制备了PoPD / Ag(PVDF)和PoPD / Ag复合电极(分别使用PVDF和海藻酸钠作为电极粘合剂制备海藻酸钠)。作为锂离子电池的阳极,与纯PoPD相比,杂化复合材料中的氧化还原活性PoPD表现出显着改善的电化学性能,具有优异的高容量,良好的倍率性能和循环稳定性,这归因于固有电学的提高通过在聚合物中引入的Ag纳米颗粒,PoPD的电导率 由于选择了海藻酸钠作为功能性电极粘合剂,-1,并且在第100次循环之后,PoPD / Ag(藻酸钠)的已发展放电容量达到1389.9 mAh g -1,明显高于PoPD的放电容量。在50、100、200和500 mAh g -1的电流速率下,其稳定和代表性的放电比容量分别为1291、1044.9、856.7、762.5 mAh g -1,明显优于PoPD和PoPD。 / Ag(PVDF),表明藻酸钠作为粘合剂对PoPD的电化学特性有特殊影响,这有利于在充电/放电过程中逐步释放容量。这项工作将为制备高性能聚(芳香胺)聚合物作为电极材料提供重要的探索。

更新日期:2020-04-06
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