使用聚多巴胺/碳布基阴极可缝制和可切割的柔性锌离子混合超级电容器,ACS Sustainable Chemistry & Engineering

当前位置： X-MOL 学术 › ACS Sustain. Chem. Eng. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

使用聚多巴胺/碳布基阴极可缝制和可切割的柔性锌离子混合超级电容器
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-10-12 , DOI: 10.1021/acssuschemeng.0c06525
Cong Huang ₁ , Xin Zhao ₁ , Yali Xu ₁ , Yan Zhang ₁ , Yujie Yang ₁ , Aiping Hu ₁ , Qunli Tang ₁ , Xianyin Song ₁ , Changzhong Jiang ₁ , Xiaohua Chen ₁

Affiliation

便携式电子产品的蓬勃发展引起了人们对开发具有低成本和高操作安全性的柔性Zn离子混合超级电容器（Zn HSC）的极大兴趣。然而，由于阴极的低容量以及柔性集电器的无效重量，低能量密度极大地阻碍了Zn HSC的商业应用。在此，通过水热聚合工艺在多孔碳布基材上对具有丰富醌基的氧化还原活性聚多巴胺（PDA）进行构图，从而开发出独立式阴极。与传统的碳布基电极不同，此处采用的碳布通过空气煅烧过程激活，这有利于PDA的装载和Zn ²⁺离子的吸收。受益于锌的混合机制^{2+ –}醌基配位和双电层吸收，聚多巴胺涂层多孔碳布（PDA @ PCC）在电流10,000次循环后可提供1.25 mA h cm ^–2的高面积容量和100％的高容量保持率密度为10 mA cm ^–2。此外，当PDA @ PCC组装成柔性Zn HSC时，仍显示出0.92 mA h cm ^–2的高容量，并且在一些极端条件下的测试（例如切割和缝纫测试）也证明了其灵活性和操作安全性。这项工作可能会为下一代柔性锌HSC带来新的机会。

"点击查看英文标题和摘要"

Sewable and Cuttable Flexible Zinc-Ion Hybrid Supercapacitor Using a Polydopamine/Carbon Cloth-Based Cathode

The booming of portable electronics has stimulated great interest in developing flexible Zn-ion hybrid supercapacitors (Zn HSCs) that feature low cost and high operational safety. However, the commercial applications of Zn HSCs are greatly hindered by low energy density due to the low capacity of the cathode and also the invalid weight of the flexible current collector. Here, a free-standing cathode is developed by patterning redox-active polydopamine (PDA) with abundant quinone groups on the porous carbon cloth substrate via a hydrothermal polymerization process. Unlike the traditional carbon cloth-based electrode, the carbon cloth adopted here is activated by the air calcination process, which is beneficial for the loading of PDA and absorption of Zn²⁺ ions. Benefiting from the hybrid mechanism of Zn²⁺–quinone group coordination and electrical double layer absorption, the polydopamine-coated porous carbon cloth (PDA@PCC) delivers a high area capacity of 1.25 mA h cm^–2 and a high capacity retention of 100% after 10,000 cycles at a current density of 10 mA cm^–2. Moreover, when assembled into flexible Zn HSCs, PDA@PCC still displays a high capacity of 0.92 mA h cm^–2, and the flexibility and operation safety have also been demonstrated by several extreme condition tests, such as cutting and sewing tests. This work may promote new opportunities for next-generation flexible Zn HSCs.

更新日期：2020-10-12

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11