An All‐Solid‐State Fiber‐Shaped Aluminum–Air Battery with Flexibility, Stretchability, and High Electrochemical Performance

Abstract

Owing to the high theoretical energy density of metal-air batteries, the aluminum-air battery has been proposed as a promising long-term power supply for electronics. However, the available energy density from the aluminum-air battery is far from that anticipated and is limited by current electrode materials. Herein we described the creation of a new family of all-solid-state fiber-shaped aluminum-air batteries with a specific capacity of 935 mAh g(-1) and an energy density of 1168 Wh kg(-1) . The synthesis of an electrode composed of cross-stacked aligned carbon-nanotube/silver-nanoparticle sheets contributes to the remarkable electrochemical performance. The fiber shape also provides the aluminum-air batteries with unique advantages; for example, they are flexible and stretchable and can be woven into a variety of textiles for large-scale applications.

Stabilizing Lithium into Cross‐Stacked Nanotube Sheets with an Ultra‐High Specific Capacity for Lithium Oxygen Batteries

“…Theuniform deposition of Li onto the 3D-CSC was further confirmed by atomic force microscopy and showed both as mooth morphology and al ower surface potential ( Figure S26). [28,29] The von-Mises stress distribution demonstrated atensile tolerance in the 3D-CSC enhanced by about 60 %c ompared to other CNT-based scaffolds (Figure 4e-g), indicating the necessity of the cross-stacked structure.T he above combined advantages of the Li/3D-CSC contribute to the beneficial specific capacity of 3656 mAh g À1 (or 1923 mAh cm À3 ,F igure 3e and Supporting Information, Figure S28 and Table S2). One CNT bundle could be restricted by neighboring ones,avoiding the contraction of the scaffold upon electrolyte soaking,t hereby enabling ah igher durability to decrease the SEI breakage and Li protrusion from the recurring volume change during cycling.…”

The Recent Advance in Fiber‐Shaped Energy Storage Devices

“…Zinc-air battery Zn spring and cross-stacked CNT layer coated with RuO 2 -based catalyst [87] Coaxial 6 Ah L −1 at 1 A g −1 Bendable and stretchable Aluminum-air battery Al wire and CNT sheet incorporated with Ag nanoparticles [89] Coaxial 935 mAh g −1 at 0.5 mA cm −2 Little influence at varying bending states www.advelectronicmat.de cathode plates closely face each other, which facilitates a fast working ion migration. Due to the curvature of the fiber electrodes, fiber-shaped devices usually exhibit a longer working ion migration length between the two electrodes, deteriorating mass transportation.…”

Recent Progress in Flexible Fibrous Batteries

“…The theoretical value of the energy density of the aluminum air battery is as high as 2796 W h kg −1 , which is much higher than that of commercial LIBs. Therefore, these batteries have been widely studied ,. Xu et al.…”

“…Xu et al. designed a fibrous aluminum‐air battery based on carbon nanotube sheets and silver nanoparticles (Figure a) . Xu et al.…”