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Effects of various carboxymethyl celluloses on the electrochemical characteristics of zinc anode from an alkaline electrolyte
Electrochimica Acta ( IF 6.6 ) Pub Date : 2017-11-15 , DOI: 10.1016/j.electacta.2017.10.204
Chao Yang , Zhijian Zhang , Zhongliang Tian , Yanqing Lai , Kai Zhang , Jie Li

The effects of molecular weight and solubility of carboxymethyl cellulose (CMC) on the electrochemical characteristics of zinc plate electrodes and Zn-Ni batteries were investigated with and without ZnO in 6 M KOH solution, respectively. The result of electrochemical impedance spectroscopy (EIS) indicated that as an important additive in zinc paste electrodes, CMCs with M.W.s of 700,000, 250,000, and 90,000 can all suppress the corrosion of zinc. The zinc deposition experiment revealed that the CMCs, especially the soluble M.W. 700,000 CMC, can suppress zinc electrodeposition kinetics and decreases the porosity of zinc deposits. Zn-Ni battery performance tests indicate that a suitable concentration of soluble CMC will decrease charge and discharge polarization and increase discharge capacity. These results indicated that various M.W.s and the solubility of CMC in 6 M KOH showed complex electrochemical effects on zinc electrodes in alkaline solution, and their addition to a zinc paste electrode needs careful consideration.



中文翻译:

各种羧甲基纤维素对碱性电解质对锌阳极电化学特性的影响

研究了羧甲基纤维素(CMC)的分子量和溶解度对在6M KOH溶液中添加和不添加ZnO的锌板电极和Zn-Ni电池电化学特性的影响。电化学阻抗谱(EIS)的结果表明,MWs为700,000、250,000和90,000的CMC作为锌糊电极中的重要添加剂,都可以抑制锌的腐蚀。锌沉积实验表明,CMCs,特别是可溶性MW 700,000 CMC,可以抑制锌的电沉积动力学并降低锌沉积物的孔隙率。Zn-Ni电池性能测试表明,适当浓度的可溶性CMC将减少充放电极化并增加放电容量。这些结果表明,各种MW

更新日期:2017-11-15
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