Ultrahigh reversible lithium storage of hierarchical porous Co–Mo oxides via graphene encapsulation and hydrothermal S-doping

Abstract

The construction of a complex structure and component adjustment are effective strategies for improving volume expansion and conductivity of transition metal oxides, which serve as promising anode materials in lithium-ion...

Low-Dimensional Nanomaterial Systems Formed by IVA Group Elements Allow Energy Conversion Materials to Flourish

“…The authors concluded that the oxidative etching reaction initiates and propagates mainly in oxygen-deficient regions, preferentially removing oxygen-containing carbon atoms, generating carbon vacancies, and eventually forming nanopores in the GO nanosheets. A simple metal-organic framework production strategy was proposed by Zhu et al [ 31 ] Layered porous CoMoO 4 -CoO/S@rGO nanopolyhedra were synthesized by hydrothermal S-doping, as shown in Figure 2 b. The preparation process can be divided into two parts; the first step synthesizes dodecahedral-shaped ZIF-67 crystal as the initial precursor.…”

“…Reprinted with permission from Ref. [ 31 ]. Copyright 2022 American Association for the Journal of Materials Chemistry A.…”

Low volume expansion hierarchical porous sulfur-doped Fe2O3@C with high-rate capability for superior lithium storage

“…Compositing with carbon materials has been proved to be an effective method to enhance electrical conductivity, increase structural stability, and relieve volume variation, such as graphene oxide (GO) encapsulation, carbon coating, and carbon fiber. [21][22][23][24][25] Ingenious morphology design is also one of the commonly adopted strategies. 26,27 Novel structural designs, such as porous, hollow, and core-shell structures, provide larger specific surface area and ample volume space, which means that the electrode material offers more lithium storage sites and alleviates volume expansion, thereby acquiring higher specific capacity and enhanced cycle stability.…”

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

“…6 Nevertheless, the slow kinetics and relatively low theoretical capacity (372 mA h g −1 ) of the most common insertion anode material, graphite, are no longer able to meet the growing demand for energy density. 7,8 In addition, the working potential of graphite (<0.1 V vs. Li + /Li) is close to the growth potential of lithium dendrite, which poses serious safety issues. 9,10 Although conversion and alloy type anode materials possess higher theoretical capacity, 11 the severe volume expansion during lithiation and delithiation prevent them from achieving long cycles.…”