Crystal phase and morphology engineering of ω-Li₃V₂O₅nanospheres for high-rate lithium-ion capacitors

Abstract

Lithium ion capacitors (LICs) as promising energy storage devices are receiving lots of attention recently. However, anodes with high rate performance are urgently needed to balance the thermodynamics and kinetics...

Facile Synthesis and Electrochemical Analysis of Zn-Doped V2O5 Anode Materials for High-Rate Li Storage

“…Figures 5(a) and 5(b) show the CV results of the Li 3 V 2 O 5 and Zn-Li 3 V 2 O 5 electrodes, respectively. The CV curves of both the electrodes exhibit distinct peaks at approximately 0.3-0.8 V (vs. Li + /Li), which can be attributed to the processes of Li insertion and extraction [37]. Notably, the shapes and positions of these CV curves remain consistent, irrespective of the presence of the Zn dopants or variations in the scan rate.…”

“…Notably, the shapes and positions of these CV curves remain consistent, irrespective of the presence of the Zn dopants or variations in the scan rate. According to the power law, the relationship between peak current and scan rate can be expressed using the following equation [37,[46][47][48]:…”

“…Recently, V 2 O 5 has been repurposed as an anode material through an electrochemical prelithiation process, demonstrating impressive long-term cycling and excellent rate capabilities [35]. The Li 3 V 2 O 5 material produced through the electrochemical prelithiation process has been further investigated [36][37][38]. Lan et al exhibited the superior low-temperature performance of the full cell incorporating the Li 3 V 2 O 5 anode [36].…”

“…Lan et al exhibited the superior low-temperature performance of the full cell incorporating the Li 3 V 2 O 5 anode [36]. Ren et al utilized the Li 3 V 2 O 5 material in Li-ion capacitors, demonstrating exceptional rate capability and remarkable cycling stability [37]. However, improving the limited Li-ion diffusion coefficients and electrical conductivities of V 2 O 5 remains challenging.…”

Compact aqueous zinc–carbon capacitors with high capacity and ultra-long lifespan

“…Electrochemical capacitors, known for their high-power output and long cycle life, are employed for peak load management and frequency regulation on the grid side. [1][2][3] Recently, there has been a proposal for zinc-carbon capacitors (ZCCs) that utilize low-cost activated carbon as the cathode, zinc metal as the anode, and water as the electrolyte solvent to maximize the benets of electrochemical capacitors in terms of energy, safety, and cost. 4,5 ZCCs consist of an aqueous electrolyte, zinc metal anode and carbon-based cathode.…”