A diluent protective organic additive electrolyte of hydrophilic hyperbranched polyester for long-life reversible aqueous zinc manganese oxide batteries  

作　　者：Hengxin Xu Song Yang Yufeng Chen Junle Xiong Shengtao Zhang Fang Gao Zhengyong Huang Hongru Li 

机构地区：[1]College of Chemistry and Chemical Engineering,Chongqing University,Chongqing 400044,China [2]Chongqing Kunding Environmental Protection Technology,Co.Ltd.,Chongqing 400044,China [3]State Key Laboratory of Power Transmission Equipments and System Security and New Technology,Chongqing University,Chongqing 400044,China

出　　处：《Frontiers of Materials Science》2023年第2期65-78,共14页材料学前沿（英文版）

基　　金：The authors wish to express warm thanks to the National Natural Science Foundation of China(Grant Nos.21376282,21676035,and 21878029);We also thank Chongqing Science and Technology Commission(Grant No.2022NSCQ-MSX1298)。

摘　　要：hydrophilic hyperbranched polyester(poly(tetramethylol acetylenediurea(TA)-CO-succinyl chloride)(PTS))was proposed to be used as an organic additive in aqueous ZnSO_(4)electrolyte to achieve a highly reversible zinc/manganese oxide battery.It is found that the zinc symmetric battery based on the 2.0 wt.%PTS/ZnSO_(4)electrolyte showed a long cycle stability of more than 2400 h at 1.0 mA·cm^(-2),which is much longer than that including the blank ZnSO_(4)electrolyte(140 h).Furthermore,the capacity retention of the Zn||MnO_(2)full cells employing the 2.0 wt.%PTS/ZnSO_(4)electrolyte remained 85%after 100 cycles at 0.2 A·g^(1),which is much higher than 20%capacity retention of the cell containing the blank ZnSO_(4)electrolyte,and also greater than 59.6%capacity retention of the cell including the 10.0 wt.%TA/ZnSO_(4)electrolyte.By using 2.0 wt.%PTS/ZnSO_(4)electrolytes,the capacity retention of the Zn||MnO_(2)full cells even reached 65%after 2000 cycles at a higher current density of 1.0 A·g^(1).It is further demonstrated that the PTS was firmly adsorbed on the zinc anode surface to form a protective layer.

关 键 词：aqueous zinc-ion battery hydrophilic branched polyester Zn anode protection Zn dendrite adsorption 

分 类 号：TM912[电气工程—电力电子与电力传动]