Robust, Conductive, and High Loading Fiber-Shaped Electrodes Fabricated by 3D Active Coating for Flexible Energy Storage Devices.
basic_science · Level V
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- Record sourced from PubMed, PMID 35820175.
- Also identified by DOI 10.1021/acs.nanolett.2c01290.
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Abstract
Flexible power sources are critical to achieve the wide adoption of portable and wearable electronics. Herein, a facile and general strategy of fabricating a fibrous electrode was developed by 3D active coating technology, in which a stepping syringe with electrode paste was synchronously injected onto a rotating conductive wire, distinguished from the conventional direct-write 3D printing without a current collector. A series of such electrodes with different coating weight can be fabricated accurately and efficiently by adjusting critical process parameters following a set of derived equations. The demonstrated fibrous Zn-MnO<sub>2</sub> battery with a high commercial ε-MnO<sub>2</sub> loading of 14.9 mg cm<sup>-2</sup> onto a stainless steel wire shows a reasonable energy density of 108 mWh cm<sup>-3</sup>, while the fiber-shaped supercapacitor with commercial porous graphene exhibits a high capacitance of 142.9 F g<sup>-1</sup> and good durability for bending 10,000 cycles. This work constructs a bridge between materials and fiber-shaped electrodes for flexible energy storage devices.