超级电容器
材料科学
电容
阳极
阴极
电极
电化学
石墨烯
氧化物
化学工程
纳米技术
储能
光电子学
冶金
电气工程
化学
量子力学
物理
工程类
物理化学
功率(物理)
作者
Yaopeng Wu,Wei Yuan,Pei Wang,Xuyang Wu,Jinghong Chen,Yu Shi,Qianyi Ma,Dan Luo,Zhongwei Chen,Aiping Yu
标识
DOI:10.1002/advs.202308021
摘要
The severe Zn-dendrite growth and insufficient carbon-based cathode performance are two critical issues that hinder the practical applications of flexible Zn-ion micro-ssupercapacitors (FZCs). Herein, a self-adaptive electrode design concept of the synchronous improvement on both the cathode and anode is proposed to enhance the overall performance of FZCs. Polypyrrole doped with anti-expansion graphene oxide and acrylamide (PPy/GO-AM) on the cathode side can exhibit remarkable electrochemical performance, including decent capacitance and cycling stability, as well as exceptional mechanical properties. Meanwhile, a robust protective polymeric layer containing reduced graphene oxide and polyacrylamide is self-assembled onto the Zn surface (rGO/PAM@Zn) at the anode side, by which the "tip effect" of Zn small protuberance can be effectively alleviated, the Zn-ion distribution homogenized, and dendrite growth restricted. Benefiting from these advantages, the FZCs deliver an excellent specific capacitance of 125 mF cm
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