Synthesis of MoO₂ hierarchical peony-like microspheres without a template and their application in lithium ion batteries

Abstract

Hierarchical peony-like MoO 2 microspheres are fabricated via a simple template-free solvothermal method and evaluated as anode materials.

Hierarchy Design in Metal Oxides as Anodes for Advanced Lithium‐Ion Batteries

“…MoO 2 microspheres via a simple, template-free solvothermal method. [55] The hierarchical MoO 2 microspheres with structural, morphological, and porous hierarchy offered a high reversible specific capacity of 757 mAh g −1 after 100 cycles at 200 mA g −1 , good cycling performance, high capacity retention, and good rate performance in the 0.01-3.0 V range. During the discharge/charge process, the reactions of the MoO 2 electrode can be attributed to intercalation reaction and conversion reaction as follows: MoO 2 ↔ Li x MoO 2 ↔ Mo + Li 2 O.…”

“…Metal oxides for LIBs based on intercalation reaction include titanium dioxide (TiO 2 ) based materials, monoclinic MoO 2 , orthorhombic Nb 2 O 5 , VO x , etc. These intercalated hosts (possessing conductive 1D paths or 2D planes) are favorable for Li + insertion/extraction with excellent structural stability and low volume expansion during the cycling process .…”

“…Designing hierarchical micro/nanostructures of MoO 2 can overcome these drawbacks by improving the insertion/extraction kinetics. For instance, Tang et al prepared hierarchical peony flower‐like MoO 2 microspheres via a simple, template‐free solvothermal method . The hierarchical MoO 2 microspheres with structural, morphological, and porous hierarchy offered a high reversible specific capacity of 757 mAh g −1 after 100 cycles at 200 mA g −1 , good cycling performance, high capacity retention, and good rate performance in the 0.01–3.0 V range.…”

MoS2‐Based Nanocomposites for Electrochemical Energy Storage

“…[55,56] First, the severe volume expansion of the anode material is inevitable, which can cause electrode pulverization and loss of contact with current collectors during long-term cycles. [57] Second, overcharge occurs with the possibility of shortcut inside of LIB. Third, the passivating solid electrolyte interface has irreversible effects on the LIB cycling capability in the first few cycles, resulting in low Coulombic efficiency.…”

Electrospun MoO2@NC nanofibers with excellent Li+/Na+ storage for dual applications

“…MoO 2 , as a layered transition-metal oxide, has obtained intensive attention due to its good electrical conductivity and high theoretical capacity [7][8][9][10]. However, MoO 2 suffers from mechanical degradation owing to large volume variations during the ion insertion and extraction processes.…”