Si@MXene/graphene crumbled spherical nanocomposites

Summary The great interest to develop the elevated capacity of silicon (Si)‐based anode material is the future necessitate for Li‐ion batteries. The three‐dimensional (3D) microsphere Si@MX‐RG nanocomposite was synthesized employing the facile spray drying method. Moreover, silicon (Si) with sponge‐...

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Published in:International journal of energy research 2022-12, Vol.46 (15), p.21548-21557
Main Authors: Thirumal, Vediyappan, Yuvakkumar, Rathinam, Kumar, Ponnusamy Senthil, Ravi, Ganesan, Velauthapillai, Dhayalan
Format: Article
Language:English
Subjects:
Analytical methods
Anodes
Batteries
Charge transfer
Chemical etching
Electrical conductivity
Electrical resistivity
Electrochemical impedance spectroscopy
Electrochemistry
Electrode materials
energy storage
Etching
Graphene
Lithium-ion batteries
Li‐ion
microsphere
Microspheres
Morphology
MXene
MXenes
Nanocomposites
Oxidation
Silicon
Specific capacity
Spectroscopy
spray dry
Spray drying
Two dimensional materials
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Summary:Summary The great interest to develop the elevated capacity of silicon (Si)‐based anode material is the future necessitate for Li‐ion batteries. The three‐dimensional (3D) microsphere Si@MX‐RG nanocomposite was synthesized employing the facile spray drying method. Moreover, silicon (Si) with sponge‐like few‐layer 2D materials (MXene/reduced graphene [MX‐RG])‐based nanostructure composite has been prepared using a spray dryer. As‐prepared MX and graphene are correspondingly derived from (LiF‐HCl) chemical etching and chemical oxidation, respectively. The FE‐SEM surface morphological views explored highly crumbled pure MX, Si@MX, Si@MX‐RG spray‐dried microsphere particle size ranges from 500 nm to 1 μm. The observed morphology results explored novel crumbled 3D nature morphology. The electrochemical performances of pure MX, Si@MX, Si@MX‐RG microsphere measured employing cyclic voltammetry (CV) revealed good anodic and cathodic peaks at 0.01–1.5 V, and electrochemical impedance spectroscopy (EIS) was analyzed for charge transfer resistance (Rct) of 42 Ω. The galvanostatic charge‐discharge (GCD) profile for Si@MX‐RG microsphere explored 2723 mAh/g anode capacity for the initial cycle, and its initial columbic efficiency (ICE) is 89.1% and it is greatly improved with the second cycle (96.8%). A high reversible 1422 mAh/g specific capacity at 3 C is revealed at 200 cycles. The excellent cycle stability and better rate capability explored exclusive structural devices of novel microspheres. Hence, we confirmed the MX and RG sheets wrapped by silicon cores are having superior conductive MX‐RG and efficiently improve electrical conductivity.
ISSN:0363-907X
1099-114X
DOI:10.1002/er.7743