超级电容器
材料科学
佩多:嘘
电容
电极
电容感应
导电体
储能
复合材料
功率密度
多孔性
纱线
光电子学
纳米技术
电气工程
功率(物理)
聚合物
化学
物理
物理化学
工程类
量子力学
作者
Young-Jung Heo,Jong Hoon Lee,Seong-Hwang Kim,Seong-Jun Mun,Sang Soo Lee
标识
DOI:10.1021/acsami.2c10746
摘要
Solid-state supercapacitors have shown extraordinary promise for flexible and wearable electronics. To date, they are still limited by relatively poor energy volumetric performances, which are largely determined by the pore structures and physicochemical properties of electrode materials. Moreover, the poor mechanical properties afforded because of the intrinsic shortcomings of electrode materials need to be resolved. Herein, we designed a flexible and solid-state yarn electrode with high porosity and high affinity toward electrolytes using poly(3,4-ethylenedioxythiophene) (PEDOT) and Korean heritage paper (KHP). To maximize the volumetric capacitive energy storage, PEDOT-loaded conductive KHP sheets (two-dimensional) were transformed into a biscrolled yarn (one-dimensional) via simple twisting. The volumetric capacitance of the biscrolled yarn supercapacitors with 1 mm cell diameter exhibited a volumetric specific capacitance of ∼6576 mF/cm3 at a scan rate of 25 mV/s, which is attributable to the high mass loading of PEDOT as a conductive support and increased packing density. Moreover, multiple optimized yarn supercapacitors can be connected to yield a total length of 1 m, demonstrating enormous potential as a portable and wearable power supply for operating smartwatches.
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