Sn-C bonding anchored SnSe nanoparticles grown on carbon nanotubes for high-performance lithium-ion battery anodes

Stabilizing Intermediate Phases via Efficient Entrapment Effects of Layered VS4/SnS@C Heterostructure for Ultralong Lifespan Potassium‐Ion Batteries

“…Additionally, for the S 2p spectrum (Figure 6f), except from the recovered S 2p 3/2 and S 2p 1/2 peaks, S 2 2– bond is still observed to exist in the VS 4 /SnS@C electrode, confirming that the existence of polar S 2 2– bond with strong chemical adsorption exhibits significant influence on the enhancement of conversion reaction reversibility, which ensures the robust chemical durability during K + intercalation‐extraction processes. [ 64 ] Whereas, the compared Sn 3d spectra of SnS@C (Figure S23, Supporting Information) presents obvious peaks shift to low valence state, while the initial S 2p spectra is nearly disappeared, confirming the poor reaction reversibility.…”

Fabrication of MnSe/SnSe@C heterostructures for high-performance Li/Na storage

“…The high capacity was associated with the carbon encapsulation and the existence of Se-C and Sn-C bonds, leading to improved Lidiffusion kinetics. 21,22,26 Due to the formation of Sn-C and Se-C polar bonds, electron transfer occurred from the carbon layer to the MnSe/SnSe nanograins and a lot of charge accumulated at the interface, which demonstrated the efficient charge transfer between the carbon layer and the MnSe/SnSe through Sn-C and Se-C chemical bonds. Notably, MnSe/SnSe (after 240 cycles), MnSe/SnSe@C-L (after 59 cycles), and MnSe/ SnSe@C-H (after 100 cycles) showed capacities of 383, 693, and 447 mA h g À1 (see Fig.…”

“…[15][16][17][18][19][20] Among the Se-based materials, SnSe has aroused widespread interest, attributed to its promising specific capacity (847 mA h g À1 ) as well as other practical advantages, such as low cost and great abundance. [21][22][23] The reaction mechanism for Li/Na storage can be exhibited as follows: 24 SnSe + 2Na + /2Li + + 2e À -Sn + Na 2 Se/Li 2 Se (1) Sn + xNa + /xLi + + xe À -Na x Sn/Li x Sn (2) On the basis of previous reports, SnSe is generally considered an outstanding anode material when applied for LIBs and NIBs. Nevertheless, SnSe is unfavorable to commercialize due to its poor structural stability and low electrical conductivity.…”

Metal-Complex-Assisted Synthesis of SnSe Nanorods for Lithium-Ion-Battery Anodes

“…The pristine state of the electrode corresponds to the diffraction peak of SnSe. During discharge, the XRD peak of SnSe disappeared and was replaced by the Li 2 Se and Sn phases at 1.17 V. In the deeply discharged state (0.11 V), only a peak of near 38° corresponding to the Li 4.4 Sn phase was detected (Figure b,c), and the peak of Li 2 Se still exists. − During the charge-transfer process, the XRD peak of Li 4.4 Sn vanished, and the Sn phase reappeared (0.6 V). Finally, in the further charged states (1.79 and 3.0 V), the XRD peak of the SnSe phase was observed. − On the basis of these observations, the following reaction mechanism of the SnSe electrode is proposed. …”