2D titanium carbide (MXene) electrodes with lower-F surface for high performance lithium-ion batteries

High performance columnar-like Fe2O3@carbon composite anode via yolk@shell structural design

“…For decades, lithium-ion batteries have been the best option to power portable electronics and electric vehicles due to their high energy density, large power density and long lifespan [1][2][3][4][5][6][7][8][9][10][11][12][13][14] . However, the need for higher energy and power density is causing commercial graphitic anodes to be inadequate due to their relatively low theoretical specific capacity ( ∼370 mAh g −1 ) and slow lithium ion diffusivity (less than 10 −6 cm 2 s −1 ) [15][16][17][18][19][20][21] . The need for greater performance has forced the exploration of alternative anode materials [15,[22][23][24][25][26] .…”

Tremella‐shaped TiCN Nanosheets as Anode mAterials of Lithium‐Ion Batteries

“…There is a concerning carbide at the weak C1s peak at 283.99 eV, indicating the formation of a TiC phase during the synthesis of the products. [25] The morphology and structure of TiCN-5 mol and 10 mol were further characterized by scanning electron microscope. As shown in Figure 3a, TiCN-5 mol is intertwined into a belt-like structure.…”

“…And there are two peaks from Ti 2p3/2 appearing at the binding energies of 456.39 and 458.14 eV, which are both higher than those from metallic Ti 2p peaks (459.8 and 453.9 eV). There is a concerning carbide at the weak C1s peak at 283.99 eV, indicating the formation of a TiC phase during the synthesis of the products [25] …”

Employing MXene as a matrix for loading amorphous Si generated upon lithiation towards enhanced lithium-ion storage

“…2 (d) compares the EIS spectra of the Si electrode and the MXene&Si hybrid electrode. A larger slope in the low-frequency region of the MXene&Si electrode's curve, indicates a smaller Warburg impedance ( W s ) [29] . Compared to the depressed semicircle in the high-to-medium frequency region for the two electrodes, the MXene&Si hybrid electrode has a smaller diameter corresponds to a decreased charge transfer resistance ( R ct ).…”