Binder-Free Electrodes of CoAl Layered Double Hydroxide on Carbon Fibers for All-Solid-State Flexible Yarn Supercapacitors

作者：Jagadale, Ajay D.; Guan, Guoqing^*; Li, Xiumin; Du, Xiao; Ma, Xuli; Hao, Xiaogang; Abudula, Abuliti

来源：Energy Technology, 2016, 4(8): 997-1004.

DOI：10.1002/ente.201600018

• carbons
• charge storage
• electrodeposition
• layered double hydroxides
• supercapacitors

Yarn supercapacitors have received much attention because of their noticeable role in advanced technologies, such as microrobots, wearable electronic textiles, and implantable medical devices. They can be prepared with different carbon-based materials, but many devices suffer from low energy densities. Conformally loaded, Faradaically active CoAl-based layered double hydroxides (CoAl LDH) are loaded onto carbon fiber (CF) yarns to prepare supercapacitors with enhanced capacitance and energy density, avoiding the need for binding agents. The effect of different CoAl LDH loading amounts on morphological, structural, and electrochemical properties is studied, and a loading amount of 2.3mgcm(-2) is found to achieve the maximum specific capacitance of 634.3Fg(-1) at a current density of 1Ag(-1). Flexible all-solid-state supercapacitor based on CoAl LDH@CF yarns offers excellent areal capacitance (195mFcm(-2)) and volumetric energy density (1.6mWhcm(-3)) with 94% cyclic stability after 4000 galvanostatic charge-discharge (GCD) cycles. The energy density and flexibility of this CoAl LDH@CFs yarn-based all-solid-state supercapacitor offer great potential for energy management in flexible electronics.

• 出版日期2016-8
• 单位太原理工大学