Vanadium Metaphosphate V(PO₃)₃ Derived from V‐MOF as a Novel Anode for Lithium‐Ion Batteries

Abstract

Electrode material is a decisive component that affects the overall performance of lithium-ion batteries (LIBs). Therefore, many researchers are committed to developing electrode materials with better performance. Metal-organic frameworks (MOFs) can provide a metal source for phosphate synthesis due to its composition. In this work, a new conversion anode material, vanadium (III) metaphosphate V(PO 3 ) 3 , is successfully prepared by adding red phosphorus into the synthesized V-MOF and calcination. V(PO 3 ) 3 can reach a high initial discharge capacity of 1068 mA h g À 1 and a high reversible capacity of 475 mA h g À 1 at a current density of 100 mA g À 1 . Remarkably, the reversible capacity of 430 mA h g À 1 was still maintained after the current density returned from 2000 to 100 mA g À 1 .

Constructing novel hydrated metal molten salt with high self-healing as the anode material for lithium-ion batteries

“…5d and e, the values of b are calculated as 0.68, 0.76, 0.94, 0.87, 0.78, 0.96, 1.13, and 0.86, respectively, which indicates that the lithium-ion storage during the charging/discharging process is mainly dominated by capacity contribution. The specific contribution rate at different scanning rates can be calculated by eqn (3), where k 1 v and k 2 v represent the current contributions of capacity-dominated and diffusiondominated, respectively. With the increase in the scanning rate (from 0.2 mV s −1 to 1.0 mV s −1 ), the contribution ratio of capacity of FeCl 3 -NMP increases from 56% to 76% (Fig.…”

“…The shortage of coal, oil, natural gas and other non-renewable energy sources as well as the increasing environmental pollution have prompted people to speed up the search for new energy systems 1,2 that are environmentally friendly, low cost, and can meet the needs of economic development with high energy density and excellent cycle stability. 3,4 Under the current background, lithium-ion batteries (LIBs), as a new energy system, have a broad application prospect and potential huge economic benefits because of their advantages of high voltage, high energy, good cycle performance, small self-discharge and no memory effect, 5,6 thus becoming a research and development hotspot all over the world. 7,8 LIBs are widely used in devices as small as electric toothbrushes and mobile phones and large as electric cars and airplanes.…”

Recent advances of transition‐metal metaphosphates for efficient electrocatalytic water splitting

“…In fact, the phosphorus source used during solid‐state synthesis is not limited to dihydric phosphate. Li et al 67 mixed V‐based metal organic framework (V‐MOF) and red phosphorus at a mass ratio of 1:1 evenly, and V(PO 3 ) 3 was obtained after calcining the mixed powder at 750°C for 5 h. Unfortunately, during phosphorylation at a high temperature, the nanosphere structure of V‐MOF was not maintained. Furthermore, after mixing Co 3 O 4 and (NH − ) 2 H 2 PO 4 thoroughly in acetone, followed by sintering at different temperatures, the ash was collected as a precursor for further thermal treatment after grinding.…”

Recent Progress in MOF‐Derived Porous Materials as Electrodes for High‐Performance Lithium‐Ion Batteries

“…synthesized V‐MOF by hydrothermal method. [ 239 ] It was mixed with red phosphorus as a V source and calcined under vacuum conditions to synthesize a new electrode material, vanadium hexametaphosphate. It shows good electrochemical properties when used as an electrode for LIBs.…”