Preparation of a nanoporous CuO/Cu composite using a dealloy method for high performance lithium-ion batteries

Abstract

A nanoporous CuO/Cu composite material was prepared using a dealloy method, and exhibited excellent cycling stability when evaluated as an anode for lithium-ion batteries.

Supported Heterostructured MoC/Mo2C Nanoribbons and Nanoflowers as Highly Active Electrocatalysts for Hydrogen Evolution Reaction

“…The Cu 2p 3/2 and Cu 2p 1/2 binding energies can be observed at 932.8 and 952.7 eV for the pristine Cu foam, and somewhat negatively shifted to 932.2 and 952.1 eV for Mo x C/Cu-2 (Table S2), suggesting charge transfer from Mo x C to Cu substrate since the work function of the former is lower than the latter (4.5 eV vs 3.4 eV) . The shakeup Cu satellite at 941.4, 943.9, and 962.3 eV observed with the Mo x C/Cu series indicate oxidized copper species. − The subpeaks for oxidized Cu 2p 3/2 and 2p 1/2 were observed at 933.8 and 953.7 eV for the precursor and Mo x C/Cu-1, and apparently positively shifted to 934.6 and 954.5 eV for Mo x C/Cu-2 and Mo x C/Cu-3. However, the signal of CuO overwhelmed that of Cu in Mo x C/Cu-3, possibly because of deep oxidation of copper at high temperatures.…”

Synthesis and superior electrochemical properties of shaggy hollow Zn-doped Fe2O3nanospheres for high-performance lithium-ion batteries

“…Recently, nanostructured transition metal oxides, such as Fe 3 O 4 , Fe 2 O 3 , Co 3 O 4 , SnO 2 , MnO 2 , TiO 2 , and so on, have been widely studied as anode materials for LIBs. [6][7][8][9][10][11][12][13][14][15] In particular, Fe 2 O 3 is considered as a promising anode for LIBs because of its high theoretical capacity (1007 mA h g −1 ), higher density (5.18 g cm −3 ) than that of graphite (2.27 g cm −3 ), nontoxicity, environmental friendliness and low cost. [16][17][18] However, the cycling performance and rate capability are still not satisfactory due to the low intrinsic conductivity and large volume change during discharge/charge cycles.…”

Fast‐Charging and High Volumetric Capacity Anode Based on Co3O4/CuO@TiO2 Composites for Lithium‐Ion Batteries

“…Cycling voltammetry (CV) profiles show a prominent cathodic peak at 0.95 V in the discharge direction at the first cycle, which can be attributed to the combination of the sequential reduction of Co 3 O 4 and CuO to metallic Co and Cu embedded in the Li 2 O matrix with formation of a solid electrolyte interphase (SEI) (Figure a, and see the CV details of single Co and Cu in TiO 2 or just TiO 2 itself in Figure S4). From the second/third scan of Co 2 Cu 1 @TNAs, the two main peaks located at 1.25 and 0.98 V are ascribed to overlapped multiple reduction of CuO/Cu 2 O/Cu and Co 3 O 4 /CoO/Co . Reasonably, the CV peaks of Co 2 Cu 1 @TNAs are predominantly affected by the reaction of Co 3 O 4 with Li + , shading the peak originated from the reaction of CuO with Li + since a relatively higher amount of Co 3 O 4 exists in Co 2 Cu 1 @TNAs.…”

“…From the second/ third scan of Co 2 Cu 1 @TNAs, the two main peaks located at 1.25 and0 .98 Va re ascribed to overlapped multiple reduction of CuO/Cu 2 O/Cu and Co 3 O 4 /CoO/Co. [34,[37][38][39] Reasonably,t he CV peaks of Co 2 Cu 1 @TNAs are predominantly affectedb yt he reaction of Co 3 O 4 with Li + ,s hading the peak originated from the reaction of CuO with Li + since ar elativelyh igher amount of Co 3 O 4 exists in Co 2 Cu 1 @TNAs. Moreover,i ti sc learly seen that the reduction peak for Co in Co 2 Cu 1 @TNAs is shiftedt o0 .95 V from 0.88 V( Co@TNAsi nt he first cycle) and the gap between multi-step reductions in the second/thirdc ycle is slightly reduced, which might be attributedt ot he synergistic effect between Co 3 O 4 and CuO.…”