Three-dimensional (3D) flower-like MoSe2/N-doped carbon composite as a long-life and high-rate anode material for sodium-ion batteries

Facile Synthesis of Ultra‐Small Few‐Layer Nanostructured MoSe2 Embedded on N, P Co‐Doped Bio‐Carbon for High‐Performance Half/Full Sodium‐Ion and Potassium‐Ion Batteries

“…For the successive oxidation processes, only as ingle anodic peak appeared at 1.70 Vi na ll the three CV curves, which corresponds to the conversion reaction of Mo to MoSe 2 (2Na 2 Se + Mo!MoSe 2 + 4Na + + e À ). [52,78] These CV profiles overlap very well after the initial cycle, illustrating the admirabler eversibility and cyclic stability during the cycling process. Galvanostatic charge/dischargec urves for the first, second, third, 50th, and 100th cycles of the MoSe 2 /NP-C-2 composite at 100 mA g À1 are exhibited in Figure 4b.C learly,t he discharge/charge plateauss tabilize at 1.70/1.34Vin the second and subsequentc ycles, which is consistent with the cathode and anode curvesi nt he CV curves, implying ar eversible insertion/extraction of sodium ions in the MoSe 2 /NP-C-2 nanocomposite.…”

Hierarchical Tubular‐Structured MoSe2 Nanosheets/N‐Doped Carbon Nanocomposite with Enhanced Sodium Storage Properties

“…The peaks at 0.53 and 0.20 Vw ere attributed to Na + insertion into the MoSe 2 interlayer to form Na x MoSe 2 and ac onversion reactiont of orm Mo nanocrystals and the Na 2 Se matrix, as well as the formationo fasolid-electrolytei nterphase (SEI) layer,r espectively. [21][22][23]40] The peak at 0.01 Vw as attributedt oN a + insertion into NC. [25,64,65] In the first anodic scan, three peaks at 0.10, 1.77, and 2.17 were observed.…”

“…[6][7][8] Var-ious strategies have been proposed to address these issues. [4,[9][10][11] The incorporation of MoSe 2 into conductive carbon materials has been demonstrated as an effective method to address the aforementioned disadvantages; [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] this enhances the electrical conductivity and inhibits volumec hange of the electrode materials and stackingb etween interlayers. In addition, the introduction of nitrogen into the carbon materialc an modulate the electronic structure and increase chemical activity,w hich can further enhancet he sodium storage properties of the electrode materials.…”

“…In addition, the introduction of nitrogen into the carbon materialc an modulate the electronic structure and increase chemical activity,w hich can further enhancet he sodium storage properties of the electrode materials. [3,6,23,[25][26][27][28][29] Another effective strategy is the use of hollow and/or porousM oSe 2 -based electrode materials. The empty space in such structures could shorten the diffusion length of Na + and accommodate the mechanical stress upon cycling, thereby improvingt he cycling stability and rate capability.…”

“…[34][35][36][37][38] Recently,s everal research groups have attempted to maximize the sodium-ion storage properties of anodesb yi ntegrating the two strategiesm entioned above. [18][19][20][21][22][23][24][25][26][27][28][39][40][41][42][43] This could significantly improve the structural and physicalp ropertieso f electrode materials to achieve high electrochemical performance. For example, Tu and co-workersp repared 3D carbon-MoSe 2 -reducedg raphene oxide composites through a facile hydrothermalm ethod.…”