Hierarchically Designed Electron Paths in 3D Printed Energy Storage Devices

Abstract

Three-dimensional (3D) microsupercapacitors (MSC) have been spotlighted, because they overcome limited areal capacitance of two-dimensional planar MSCs. Specially, 3D printing technology offers numerous advantages to generate 3D electrodes for MSCs, which includes time-saving, cost-effective manufacturing, and realization of tailorable complex electrode designs. In this paper, we report novel hierarchical 3D designs of conductive 3D electrodes for MSC by digital light processing (DLP)-based 3D printing. Photocurable composite resin with silver nanowires was optimized for DLP printing for the hierarchical design of high aspect ratio in 3D electrodes. The hierarchical 3D electrodes showed unique patterns on the structure corresponding to stacking of layers in the direction of 3D printing. The fabricated 3D MSCs demonstrated low electrical resistance to be used as feasible MSC electrodes. Energy storage from silver redox reactions was demonstrated in hierarchical 3D electrodes designed with mechanically durable 3D octet trusses.

3D Structural Strengthening Urchin‐Like Cu(OH)2‐Based Symmetric Supercapacitors with Adjustable Capacitance

“…Nevertheless, octet‐truss electrode shows the smallest R s value as well as the lowest R ct value among them which can be mainly attributed to the largest active surface area and thus the most ions/electrons transfer pathways, consistent with the abovementioned CV and GCD results. In addition, the steep slope of the curve of octet‐truss electrode observed at low frequency indicates a good capacitor characteristic …”

3D Printing of Electrochemical Energy Storage Devices: A Review of Printing Techniques and Electrode/Electrolyte Architectures

“…With the high controllability of 3D printing, the width of the gap and thickness of electrolyte can also be adjusted. Compared with the EES devices with traditional sandwich structure, the hierarchical 3D interdigitated electrodes provide large surface area for ion diffusion and offer a pathway for fast electron transfer, resulting in increased efficiency and performance of EES devices …”

Advances on three‐dimensional electrodes for micro‐supercapacitors: A mini‐review

“…Thus, technological operation needs further to be simplified to achieve accurate, efficient, cost‐effective, and high‐yield production. For instance, recent emerged 3D‐printing technology offers new hope in realizing 3D electrodes with more miniaturization, large‐scale, and efficiency in a highly accurate controlled way …”

“…For instance, recent emerged 3D-printing technology offers new hope in realizing 3D electrodes with more miniaturization, large-scale, and efficiency in a highly accurate controlled way. [90][91][92][93][94][95][96][97] 2. Packaging considerations: Packaging plays a role in sealing and well conserving the electrolyte in practically usage process.…”