无粘结剂Co9S8/Ni7S6异质结构电极一步电沉积制备高性能共面微型超级电容器

IF 3.6 2区 物理与天体物理 Q2 PHYSICS, APPLIED
Chi Zhang, Weixuan Shao, Jujian Liao, Di Wu, Xiaoxia Yao, Guannan Peng, Bo Liang, Mohammadreza Shokouhimehr, Zhengchun Liu
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引用次数: 0

摘要

共面微型超级电容器(CMSCs)是发展可穿戴设备必不可少的能量供应元件。然而,能量密度不足阻碍了它们在柔性传感器和便携式电子器件中的广泛应用。本研究设计和制备了一种异质结构的无粘结剂Co9S8/Ni7S6电极,通过一步电沉积工艺实现,以纠正CMSCs存在的缺陷。通过电化学评价确定合适的硫引入量,然后将优化后的电极和活性炭组装成混合超级电容器。所得到的CMSC具有令人印象深刻的能量密度0.031 45 mW h cm−2,在8000次循环后容量保持率为93.4%。值得注意的是,即使折叠,CMSC的容量也基本保持不变,这证明了其卓越的机械稳定性和实用性。此外,密度泛函理论模拟表明,异质结构的产生促进了电极中电子传输的加速。本研究为CMSCs的制备技术和电极发展提供了有价值的观点。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Binder-free Co9S8/Ni7S6 heterostructure electrodes via one-step electrodeposition for high-performance coplanar micro-supercapacitors on paper
Coplanar micro-supercapacitors (CMSCs) are essential energy supply components for the development of wearable devices. However, inadequate energy density hinders their extensive utilization in flexible sensors and portable electronic gadgets. This study presents the design and preparation of a binder-free Co9S8/Ni7S6 electrode with a heterostructure, achieved by a one-step electrodeposition procedure to rectify existing deficiencies of CMSCs. Electrochemical evaluations are conducted to ascertain the appropriate amount of sulfur introduction, followed by the assembly of the optimized electrode and activated carbon into a hybrid supercapacitor. The resultant CMSC has an impressive energy density of 0.031 45 mW h cm−2 with 93.4% capacity retention after 8000 cycles. Notably, CMSC's capacity remains mostly unchanged even when folded, demonstrating its exceptional mechanical stability and usage. In addition, density functional theory simulations elucidate that the creation of heterostructures facilitates accelerated electron transportation in electrodes. This study provides a valuable viewpoint regarding fabrication techniques and electrode advancement of CMSCs.
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来源期刊
Applied Physics Letters
Applied Physics Letters 物理-物理:应用
CiteScore
6.40
自引率
10.00%
发文量
1821
审稿时长
1.6 months
期刊介绍: Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.
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