电极
材料科学
异质结
制作
光电子学
电化学
密度泛函理论
可穿戴计算机
纳米技术
电流密度
碳纤维
储能
能量密度
可穿戴技术
数码产品
设计要素和原则
晶体管
作者
Chi Zhang,Weixuan Shao,Jujian Liao,Di Wu,Xiaoxia Yao,Guannan Peng,Bo Liang,Mohammadreza Shokouhimehr,Zhengchun Liu
摘要
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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