In/Ce Co-doped Li₃VO₄ and Nitrogen-modified Carbon Nanofiber Composites as Advanced Anode Materials for Lithium-ion Batteries

Abstract

Li 3 VO 4 (LVO) is considered as a novel alternative anode material for lithium-ion batteries (LIBs) due to its high capacity and good safety. However, the inferior electronic conductivity impedes its further application. Here, nanofibers (nLICVO/NC) with In/Ce co-doped Li 3 VO 4 strengthened by nitrogen-modified carbon are prepared. Density functional theory calculations demonstrate that In/Ce co-doping can substantially reduce the LVO band gap and achieve orders of magnitude increase (from 2.79 × 10 −4 to 1.38 × 10 −2 S cm −1 ) in the electronic conductivity of LVO. Moreover, the carbon-based nanofibers incorporated with 5LICVO nanoparticles can not only buffer the structural strain but also form a good framework for electron transport. This 5LICVO/NC material delivers high reversible capacities of 386.3 and 277.9 mA h g −1 at 0.1 and 5 A g −1 , respectively. Furthermore, high discharge capacities of 335 and 259.5 mA h g −1 can be retained after 1200 and 4000 cycles at 0.5 and 1.6 A g −1 , respectively (with the corresponding capacity retention of 98.4 and 78.7%, respectively). When the 5LICVO/NC anode assembles with commercial LiNi 1/3 Co 1/3 Mn 1/3 O 2 (NCM111) into a full cell, a high discharge capacity of 191.9 mA h g −1 can be retained after 600 cycles at 1 A g −1 , implying an inspiring potential for practical application in high-efficiency LIBs.

One-step uniform rotation solvothermal synthesis of a Li3VO4@rGO anode material with superior cycling and rate performance

“…4,50 The reduction peaks moving to about 0.6 and 1.0 V after three cycles resulted from the electrochemical activation of the Li 3 VO 4 @rGO–R electrode. 51 Correspondingly, the oxidation peaks at 1.05 and 1.32 V during the anodic scan correlate with the deintercalation of Li + from Li 3 VO 4 . 38 The galvanostatic discharge/charge (GCD) profiles of Li 3 VO 4 @rGO–R at 0.1 A g −1 are shown in Fig.…”

Prominent long-life and high-rate performance rendered by crystallized Li3VO4 embedded in amorphous carbon nanoflakes

“…4i). 18,26,[46][47][48][49][50][51][52][53][54][55] The EIS tests of these electrodes were also measured aer 10 000 cycles as shown in Fig. S15a.…”

Progress on Bifunctional Carbon‐Based Electrocatalysts for Rechargeable Zinc–Air Batteries Based on Voltage Difference Performance

“…[127,128] Li et al reported a simple strategy to fabricate nitrogen, sulfur, and dual metal (Fe/Ni) co-doped carbon nanocomposite as an effective bifunctional catalyst for RZABs. [96] First, 1,4-bis(1-hexy-1Himidazo-[4,5-f ] [1,10] phenanthroline-2-yl) benzene (HIPB) compounds were synthesized and used as organic ligands to generate TM-mediated imidazole-o-phenanthroline derivatives (labeled as HIPB-M). HIPB-M was mixed with trithiocyanuric acid (TTCA) and pyrolyzed at a high temperature to obtain FeNi/NS-C electrocatalyst.…”

“…Lithium‐ion batteries (LIBs) have been the most successful portable energy storage technology since they were first reported in 1990. [ 1,2 ] Despite the great commercial success of LIB technology, it still suffers from insufficient energy density (typically less than 350 Wh kg −1 ) the high cost of anode materials, and potential safety issues. [ 3,4 ] Therefore, there is a need to find safer, more efficient, and cost‐effective solutions for energy conversion and storage.…”