化学
聚乙烯醇
电解质
水溶液
聚合物
法拉第效率
电导率
化学工程
复合数
电化学
材料科学
电极
复合材料
有机化学
物理化学
工程类
作者
Xin Zhong,Peishu Tian,Cong Chen,Xiangchao Meng,Haoyu Mi,Fengwei Shi
标识
DOI:10.1016/j.jelechem.2022.116968
摘要
Gel polymer electrolytes (GPE) endow zinc-ion batteries (ZIBs) with the properties of intrinsic safety, high performance, and promising applications for energy storage systems. However, the electrochemical performance of ZIBs with GPE is limited by low ion conductivity and poor interface contact. In this work, a novel sodium alginate/polyvinyl alcohol/polyvinyl pyrrolidone composite GPE were obtained by solution casting and solvent displacement methods. The optimized GPE exhibited high ion conductivity of 9.46 × 10−3 S cm−1 and excellent mechanical strength. The flexible ZIBs assembled with prepared GPE showed a specific capacity of 109.3 mAh g−1 and a capacity retention of 68.0 % after 1000 cycles at 1C. It also maintained perfect long-term cycling stability and high coulombic efficiency (CE) of nearly 100 %. The advantages of the prepared electrolyte could broaden the scope of applications of ZIBs.
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