Effect of binders on electrochemical properties of AgO cathode material for aqueous AgO−Al batteries

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2025-05-01 DOI:10.1016/S1003-6326(25)66773-2

Xue-hua HE , Sheng-gui WANG , Yuan-kui WANG , Wan-li XU , Jue-min SONG , Zheng LI , Hai-tao ZHANG , Guang-zhou YANG , Xin-yi WANG , Qian ZHANG , Hong-xu LI , Kun YU

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Abstract

To improve the slow kinetics and poor mechanical strength of aqueous silver peroxide−aluminum (AgO−Al) battery cathode materials, the effects of different binders including polytetrafluoroethylene (PTFE) and polyvinylpyrrolidone (PVP) on the AgO cathode material were investigated. The samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), cyclic voltammetry (CV), electrochemical impedance spectrum (EIS), and galvanostatic discharge. In contrast to the pure AgO and AgO−PTFE electrodes, the results demonstrated that the PVP effectively bound the electrode materials together. The prepared AgO−PVP as the cathode material of AgO−Al batteries could improve the battery capacity, exhibiting a high specific capacity (389.95 mA·h/g at 500 mA/cm²), a high operating voltage (1.75 V at 500 mA/cm²), a maximum energy density (665.65 W·h/kg), and a maximum power density (5236 W/kg). Furthermore, the electrochemical mechanism of the AgO−PVP cathode material was examined, revealing that the electrode exhibited rapid ion diffusion and effective interfacial ion/electron transport.

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粘结剂对水性AgO - Al电池AgO正极材料电化学性能的影响

为了改善过氧化银-铝（AgO - Al）电池正极材料动力学慢、机械强度差的问题，研究了聚四氟乙烯（PTFE）和聚乙烯吡罗烷酮（PVP）等不同粘结剂对AgO正极材料的影响。采用扫描电镜（SEM）、透射电镜（TEM）、循环伏安法（CV）、电化学阻抗谱（EIS）和恒流放电对样品进行了表征。与纯AgO和AgO−PTFE电极相比，结果表明PVP有效地将电极材料结合在一起。制备的AgO−PVP作为AgO−Al电池的正极材料，具有较高的比容量（500ma /cm2时389.95 mA·h/g）、较高的工作电压（500ma /cm2时1.75 V）、最大能量密度（665.65 W·h/kg）和最大功率密度（5236 W/kg）。进一步研究了AgO - PVP阴极材料的电化学机理，发现该电极具有快速的离子扩散和有效的界面离子/电子传递。

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.