Cr₂O₃/carbon nanosheet composite with enhanced performance for lithium ion batteries

Abstract

A Cr2O3/carbon nanosheet composite is directly synthesized by solution combustion synthesis using chromium nitrate as the chromium source and glucose as the carbon source. As anode materials for LIBs, the composite shows superior performance than pure Cr2O3.

Cr2O3nanosheet/carbon cloth anode with strong interaction and fast charge transfer for pseudocapacitive energy storage in lithium-ion batteries

“…2d) shows two peaks at 586.5 and 576.7 eV which could be ascribed to Cr 2p 1/2 and Cr 2p 3/2 , respectively. 28 The high-resolution O 1s spectrum ( Fig. 2e) has two peak at 530.3 and 531.8 eV corresponding to the O-Cr and O]C bonds, respectively, whereas the C 1s spectrum (Fig.…”

“…These issues have been resolved by introducing conductive carbon substrates to enhance the electronic conductivity and accommodate the volume changes occurring during the charge/discharge cycles. [26][27][28][29][30][31] For example, the mesoporouse carbon-Cr 2 O 3 composite exhibited an initial reversible capacity of 710 mA h g À1 and good cyclic stability. 26 Ultrasmall Cr 2 O 3 nanoparticles were incorporated in a carbon nanocapsule conguration by a surfactant-free solvothermal route with renewable furfural as the carbon source, achieving 568 mA h g À1 aer more than 200 cycles at a current density of 100 mA g À1 .…”

“…27 Cr 2 O 3 /carbon nanosheet composites were synthesized by a solution combustion method, which exhibited an initial capacity of 1680 mA h g À1 . 28 Although the electrochemical performance of the Cr 2 O 3 anodes greatly improved, there remain critical issues that need to be resolved. For example, the carbon content in the composite electrode was typically more than 25 wt%, which is excessive.…”

Electrodeposited Nickel/Chromium(III) Oxide Nanostructure-Modified Pencil Graphite Electrode for Enhanced Electrocatalytic Hydrogen Evolution Reaction Activity

“…Chromium­(III) oxide (Cr 2 O 3 ), the most stable oxide of chromium, naturally occurs as eskolaite mineral . Cr 2 O 3 is a rigid and fragile material that has a hexagonal crystal structure, which has been used in many applications, such as lithium-ion batteries, supercapacitors, gas sensors, and magnetoelectric data storage. − Several studies have shown that Cr 2 O 3 exhibits high electrocatalytic activity and long-term stability for HER. − According to previous reports, nanostructured Cr 2 O 3 materials are prepared using various methods, such as chemical vapor deposition, the sol–gel method, physical vapor deposition, the microwave oven method, electrostatic spray deposition, and the precipitation technique. ,− The electrochemical technique, among other applications, is advantageous because it is inexpensive, straightforward, and applicable under ambient conditions. No studies have reported on the electrochemical synthesis of Cr 2 O 3 nanostructures directly on the electrode surface via potentiometric deposition using a three-electrode cell system.…”

Reversible High Capacity and Reaction Mechanism of Cr2(NCN)3 Negative Electrodes for Li‐Ion Batteries

“…However, the low electrical conductivity, the unstable SEI film, and the large volume change during cycling have hindered its possible application as an anode material. To overcome these issues, many researchers have turned to more sophisticated and therefore expensive approaches such as surface‐modified Cr 2 O 3 and also Cr 2 O 3 /carbon composites to improve its electrochemical performance . This work shows that the electrochemical mechanism of the reaction of Cr 2 (NCN) 3 with lithium is completely different from that of its oxide analogue, and how this difference influences its performances in lithium batteries.…”