动力学
离子
扩散
分子
水溶液
锌
化学
涂层
无机化学
材料科学
物理化学
有机化学
热力学
物理
量子力学
作者
Yunbo Li,Yuhong Jin,Hongyan Zhou,Qinghua Fan,Youzhong Dong,Quan Kuang,Yanming Zhao
标识
DOI:10.1016/j.jpowsour.2024.234434
摘要
Aqueous Zn-ion batteries (AZIBs) with excellent electrochemical performance are achieved by using small organic molecules VO(acac)2 (IV) as cathode. The surface area and electrical conductivity of IV are increased by coating wrinkled rGO, thereby improving the electrochemical sluggishness of IV cathode. The VO(acac)2@rGO (IV@rGO) aqueous battery can display a high capacity of 327.2 mAh g−1 at 100 mA g−1. The Zn2+ and H+ con-insertion/extraction reactions within IV@rGO are a joint control of pseudocapacitance and diffusion process. The in-situ XRD combinded with ex-situ Raman and XPS reveal that the multivalent transition of vanadium and coordination reaction of organic functional groups (VO), and no significant volume change of IV structure implying near-zero expansion characteristic during charging/discharging process.
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