A novel SnS2 nanomaterial based on nitrogen-doped cubic-like carbon skeleton with excellent lithium storage

Nitrogen-Doped Porous Ag–C@Co3O4 Nanocomposite for Boosting Lithium Ion Batteries

“…The SEI surface resistance ( R s ) corresponds to a compressed semicircle in the high-frequency region, and the semicircle in the mid-frequency domain corresponds to the charge transfer resistance ( R ct ) of the unit system. The diagonal line in the low-frequency domain corresponds to the Warburg diffusion impedance ( Z w ) of the ion diffusion velocity of the unit system. , A complete impedance test is based on high-frequency semicircles (phase-to-phase resistance R ct ) and low-frequency diagonal (Warburg impedance Z W of the lithium ion diffusion process). For two cells, the single depressed semicircle with charge-transfer resistance within Ag–C@Co 3 O 4 and Co 3 O 4 /Ag–C is identified by the diameter R ct .…”

“…The diagonal line in the low-frequency domain corresponds to the Warburg diffusion impedance (Z w ) of the ion diffusion velocity of the unit system. 49,50 A complete impedance test is based on high-frequency semicircles (phaseto-phase resistance R ct ) and low-frequency diagonal (Warburg impedance Z W of the lithium ion diffusion process). For two cells, the single depressed semicircle with charge-transfer resistance within Ag−C@Co In particular, as shown in Figure S3, the minor pore size (0−4 nm) and higher surface area (94.9 m 2 g −1 ) of Ag−C@Co 3 O 4 means that there is an effective loading space of lithium ions compared with Co 3 O 4 / Ag−C (0−6 nm, 72.3 m 2 g −1 ) in the cycling process, and it also provides a repression of volume expansion.…”

MoP2/C@rGO synthesised by phosphating the molybdenum-based metal organic framework and GO coating with excellent lithium ion storage performance

“…5b). 11,52,53 Furthermore, the contribution of the surface capacitance to the current response can be calculated according to the formula (5): i (V) = k 1 (V) v + k 2 (V) v 1/2 .…”

Facile and Scalable Fabrication of Sub‐Micro MnS@Nitrogen‐Sulfur‐Codoped‐Carbon Composites for High‐Performance Lithium‐Ion Half and Full‐Cell Batteries

“…The desperate demands for rechargeable lithium-ion batteries (LIBs) in various energy storage devices greatly promote the constant pursuit of new electrode materials, especially anode materials with high specific capacity and long-life. [1][2][3] Constrained by the low specific capacity of only 372 mAh g À 1 for conventional graphite, transition metal sulfides (TMSs, e. g. MoS 2 , [4] CoS 2 , [5][6][7] CuS, [8][9][10] SnS 2 [11,12] ) have been studied insensitively because of their intrinsic safety, high capacity, especially the superior electrical conductivity and mechanical stability compared with their metal oxide counterparts. [13][14][15][16] Among the TMSs group, manganese sulfide (MnS), typically the stable αphase, has been deemed as a prospective anode material for its merits of almost twice the theoretical capacity of graphite (616 mAh g À 1 ), cheaper manganese resource and environmentally-friendliness.…”