Toward Tailorable Zn‐Ion Textile Batteries with High Energy Density and Ultrafast Capability: Building High‐Performance Textile Electrode in 3D Hierarchical Branched Design

Abstract

Rechargeable Zn-ion batteries are promising candidates for wearable energy storage devices. However, their performance is severely restricted by the low conductivity and inferior mass loading. Herein, a new type of the textile based electrodes with 3D hierarchical branched design is reported. Both Ni nanoparticles and carbon nanotubes are used to build conductive coatings on the textiles. The 3D hierarchical nanostructures, consisting of the vertical-aligned nanosheets and the fluffy-like small flakes, grow on the conductive textiles to form the self-supported electrodes. It ensures fast electron/ion transport and high mass loading, and maintains the structure stability during cycling. Two textile electrodes with the NiCo hydroxide and MnO self-branched nanostructures are constructed. Their faster kinetics, higher capacity and better rate capability than the solitary nanosheets based counterpart demonstrate the superiority of the hierarchical architecture. Moreover, the solid-state Zn-MnO and Zn-NiCo batteries are fabricated based on the textile electrodes and the polymer electrolytes. The high energy density, superior power density and good long-term cycling stability confirm their excellent energy storage ability and fast charge/discharge capability. Particularly, the high safety under various conditions enable them promising candidates for wearable electronics.

Unlocking the Door of Boosting Biodirected Structures for High‐Performance VNxOy/C by Controlling the Reproduction Mode

“…In addition, the energy/power densities of the cells are investigated. As displayed in the Figure 7b, the cells based on different structured biocomposites achieve superior volumetric energy and power densities than the other electrochemical devices, such as the Zn//Ni@textile, [33] Zn// MnO 2 @textile, [33] Zn//Zn 2 V 2 O 7 @C and Zn//V 2 O 5 @C fiber, [34] Zn/Ni yard, [35] ZnO//NiO@carbon cloth, [36] NiO//Fe 3 O 4 , [37] Li thin-film battery, [38] and so on. The superior high volumetric power densities of the prepared cells are even comparable to commercial supercapacitors, such as TiO 2 //MnO 2 [39] and AC//AC.…”

Recent Advances in Polymer Electrolytes for Zinc Ion Batteries: Mechanisms, Properties, and Perspectives

“…Under different bending angles, the device still performed well (Figure 7c), demonstrating the favorable stretchability of the PVA. A Zn-Ni batteries based on PVA/KOH as electrolyte were fabricated by Zhao et al [131] revealing a capacity retention of 94% after 1000 cycles at 1 C. Li et al [101] assembled a fiber-sharped Zn-Co battery utilizing CC-ZnO@C-Zn functioning as anode, Co(CO 3 ) 0.5 (OH) x •0.11H 2 O@CoMoO 4 (CC-CCH@CMO) serving as cathode and PVA/KOH-based gel as electrolyte, as shown in Figure 7d. According to Figure 7e, a capacity retention of 82% is revealed at 250 mA cm −3 over 1600 cycles.…”

Dendrites issues and advances in Zn anode for aqueous rechargeable Zn‐based batteries

“…The directly synthesized 3D Zn electrode has no need to consider the affinity issues. Novel Zn sponge, 53 Zn foam, 54 and Zn nanosheet 55 were devoted to eliminating the dendrite issues. All 3D structures should pay special attention to the larger electroactive sites for side reaction comparing with the planar structure.…”