Efficient preparation and characterization of graphene based …

For the preparation of graphene by ball milling, flake graphite is the primary raw material, aluminum powder is used as a grinding aid to help peel off the carbon layer, and …

A Study on High-Rate Performance of Graphite …

The prolonged ball milling of graphite leads to a drop in the specific capacity of the electrodes, which can be attributed to the high surface area of the ball-milled graphite leading to intense (electro)chemical reactions …

Edge-carboxylated graphene nanosheets via ball milling

In a typical experiment, ball milling was carried out in a planetary ball-mill machine (Pulverisette 6, Fritsch; Fig. S1A) in the pre-sence of graphite (5.0 g, Fig. 1A), dry ice (100 g, Fig. 1B) and stainless steel balls (Fig. S1B). Detailed experimental conditions for the ball milling can be found in the Materials and Methods

Amorphous Si/TiC/Graphite Composite Fabricated by High-Energy Ball

Amorphous silicon/titanium carbide/graphite (a-Si/TiC/G) composite anodes were successfully prepared by multi-step high-energy ball-milling. x-ray diffraction and high-resolution transmission electron microscopy analyses demonstrated that the Si was completely transformed into an amorphous phase mixed with TiC after prolonged milling. TiC was gradually converted …

Preparation of Nitrogen-doped Holey Multilayer Graphene …

The high-energy "shock" mode of ball milling of graphite in presence of melamine induced the formation of multilayer defective graphene as an intermediate product before being converted into N-doped multilayer holey graphene after the removal of the in-plane defects during the milling process. The characterization of the final product ...

Graphene-based lithium-ion battery anode materials …

The graphite was first unzipped by ball milling, then the SnSb 2 Te 4 nanodots (≈10 nm) coupled with few-layered graphene with further milling. The fabricated electrode exhibits a high capacity of 373 mAh g −1 even at 10 A g −1 and promising cycling performance of 478 mAh g −1 at 1 A g −1 after 1000 cycles.

In-plane defects produced by ball-milling of expanded graphite

Fig. 1 is the typical XRD patterns of EG at various milling times. It can be seen that the diffraction of the original EG is dominated by the super strong (0 0 2) peak.The (1 0 1*) peak at 43.7° is attributed to the rhombohedral phase of graphite which is present with the hexagonal phase.The main difference between the two phases relates to the stacking order of …

Scalable high yield exfoliation for monolayer nanosheets

Exfoliation of graphite. The feasibility of this technique was first exemplified by graphite exfoliation. In a typical operation, graphite and PEI were mixed in milling jars and milled at 500 rpm ...

Ball milling : a green mechanochemical approach for …

Our results showed ball milling of graphite in nitrogen could distort the graphitic structure and reduce the size of the (0 0 2) plane. As graphite is an anisotropic material, which has significant anisotropic electro-conductivity, the distorted graphitic structure and the tailored (0 0 2) plane may lead to an increased electronic resistance ...

(PDF) Recent Advances in Ball-Milling-Based Silicon

Recent Advances in Ball-Milling-Based Silicon Anodes for Lithium-Ion Batteries. March 2023; Energies 16(7):3099; ... 0, 25, and 50 wt% graphite was added to Si during ball milling. Although.

Graphite functionalization by ball milling with sulfur

Graphite functionalization by ball-milling of graphite with gases (CO 2, N 2, F 2 and Cl 2), liquids (SO 3, Br 2) and solids (I 2, maleic anhydride and elemental sulfur) have been described by many reports.

Ball-milling: the behavior of graphite as a function of the …

The ball milling of graphite in the presence of a liquid leads to very thin, well-crystallized and anisometric particles. In the presence of water, the graphite particles are covered by γ Fe 2 O 3 (maghemite) formed by the oxidation of the ferrous alloy coming from the milling tools. This composite presents interesting electrochemical properties.

Nitrogen-doped graphene by all-solid-state ball-milling …

All-solid-state ball-milling is developed for N-doped graphene from graphite. N-doped graphene shows enhanced lithium-ion storage behavior than undoped graphene. Low …

Nitrogen-doped graphene by ball-milling graphite with …

indicates the occurrence of the ball-milling-induced edge-doping of graphite/graphene [14]. Figure 2(b) shows Raman spectra of the graphite before and afterballmilling.Ascanbeseen,ball-millingdramati-cally increased the D band with respect to the G band, indicating a significantly increased number of defect sites induced by the ball-milling ...

Breaking graphite through a ball-milling process: the …

Experimentally, zirconia ball beads with different ball diameters were selected. The tangential friction and lateral self-lubrication of graphite were developed when the ball beads with different particle diameters were rotated at high speed. In the presence of ODA, the scaled GP was mechanically exfoliated by planetary ball-milling.

A Study on High-Rate Performance of Graphite …

In this study, an effective ball-milling process has been set up by which graphite nanostructures with a high surface area are produced. An in-depth investigation into the effect of ball milling on graphite structure as well as …

Preparation of graphene via wet ball milling and in situ …

Functionalized graphene (G-MA) was prepared by a facile wet ball milling strategy, which achieved exfoliation and functionalization of graphite simultaneously. The G-MA showed excellent dispersion in water and polar solvents. Thus, a G-MA coating was prepared from G-MA in mixed solvents (H2O–ethanol) without

Synthesis of graphene oxide from graphite by ball milling

Oxidation of the graphite by the ball milling method was achieved adding potassium perchlorate and deionized water as a medium. Moreover, by ball milling energy was possible to get graphene oxide. This can be considered as an effective and enhanced method compared with Hummer's method due to processing time. Raman and FTIR studies revealed the ...

Directly ball milling red phosphorus and expended graphite …

From the LSV curves of ball-milled EG with ball-milling of 72 and 120 h, the overpotentials of EG-120, EG-72 and neat EG at j = 10 mA cm −2 are 508, 622 and 712 mV (Fig. S3), demonstrating the defects in the structures of graphite could provide more active sites and favors the improvement of OER catalytic performance.

Breaking graphite through a ball-milling process: the thermal

Exfoliated graphite platelets (EGPs) have attracted extensive attention owing to their exceptional combinations of thermal conductivity and mechanical properties. Mechanical …

Edge-carboxylated graphene nanosheets via ball …

In a typical experiment, ball milling was carried out in a planetary ball-mill machine (Pulverisette 6, Fritsch; Fig. S1A) in the presence of graphite (5.0 g, Fig. 1A), dry ice (100 g, Fig. 1B) and stainless steel balls (Fig. …

Chemical synthesis of single‐layer graphene by using ball milling

Ball-milling is the most common process for graphene synthesis. In several studies, the mill was run in different features [,, ]. Edge-carboxylate graphite (ECG) was produced by ball milling and analysed by using a finite-element method. The ball-mill machine runs 48 times at 500 rpm, each time with 50 min of ball-milling and 10 min of rest.

Frontiers | Si@SiOx/Graphene Nanosheets Composite: Ball Milling

Two economic ways have been explored to prepare GNS on large scale. One is exfoliation of graphite using ball milling, and another way is to treat the expandable graphite with high temperature (Zhao et al., 2010a; León et al., 2011; Xiang et al., 2011; Yan et al., 2012).