Binder free Cu2O/CuO/Cu/Carbon-polymer composite fibers derived from metal/organic hybrid materials through electrodeposition method as high performance anode materials for lithium-ion batteries

The Synergetic Effect Induced High Electrochemical Performance of CuO/Cu2O/Cu Nanocomposites as Lithium-Ion Battery Anodes

“…As is shown in Figure 6, The electrochemical impedance spectroscopy (EIS) of CuO/Cu 2 O/Cu nanocomposites and CuO nanowires were measured between 10 -2 Hz and 10 5 Hz before and after cycling to further understand the reaction kinetics and the enhanced electrochemical performance (Yuan et al, 2017;Yuan et al, 2019;Wang et al, 2021b). Two semicircles and a straight line were found in the Nyquist plots (scatters) (Murphin Kumar et al, 2020;Wang et al, 2020b;Li et al, 2021c;Wang et al, 2021b), which are well fitted by the equivalent circuit (fitting lines). The equivalent circuit is shown in Figure 6A inset, and the parameters of R s represents the ohmic resistance, R cf signifies the impedance of the SEI layer, R ct denotes the charge transfer resistance, W 1 designates the Warburg impedance (Wang t al., 2020b;Murphin Kumar et al, 2020;Wang et al, 2021b;Li et al, 2021c).…”

“…The characteristic peaks at 38.7 °and 61.5 °signify ( 111) and ( 113) crystal plane of monolithic CuO phase (PDF No. 48-1548) (Huang et al, 2011;Chen et al, 2015;Shi et al, 2016;Yuan et al, 2017;Wu et al, 2018;Xu et al, 2019;Trukawka et al, 2021), and the peaks at 29.6 °, 36.4 °, and 42.3 °index to ( 110 (Yu et al, 2007;Hu et al, 2013;Zhou et al, 2014;Meng et al, 2015;Kim et al, 2016;Xu et al, 2019;Li et al, 2021c).…”

“…x O 1−x/2 (0 ≤ x ≤ 0.4) solid-solution mixed-phase (Huang et al, 2011;Yuan et al, 2019;Zhang et al, 2021), formation of Cu 2 O phase (Zhang et al, 2013;Wu et al, 2018;Zhang et al, 2021), and the following transformation into Cu phase as well as the formation of solid electrolyte interface (SEI) (Shi et al, 2016;Yuan et al, 2017;Li et al, 2021c). The three reduction peaks increase to 2.34, 1.32, and 0.83 V and overlap in the following cycles (Xu et al, 2019), which indicates the excellent reversible cycle stability (Huang et al, 2011;Chen et al, 2015;Shi et al, 2016;Yuan et al, 2017;Trukawka et al, 2021).…”

“…To make sure the thorough penetration of the electrolyte, all cells were left to stand for 12 h before being measured. 110), ( 111), ( 111), ( 202), ( 020), ( 202), ( 113), ( 311), ( 220), (311), and (004) crystal plane of monolithic CuO phase respectively, which indicates the good crystallinity of CuO (Huang et al, 2011;Chen et al, 2015;Shi et al, 2016;Yuan et al, 2017;Wu et al, 2018;Xu et al, 2019;Murphin Kumar et al, 2020;Li et al, 2021c;Trukawka et al, 2021). From the XRD patterns of CuO/Cu 2 O/ Cu nanocomposites shown in Figure 2B, we can see that the asprepared sample comprises CuO, Cu 2 O, and Cu phases.…”

Facile Synthesis of Micro CuO Crystals for Li Ion Full Battery

“…CuO as a kind of a p-type semiconductor material is environmentally friendly, cheap and rich in resources for the energy storage. Many researcher have focused on the CuO/Cu composite [5], CuO/Cu/TiO 2 NT/Ti [6], CuO nano ake arrays [7], mesocarbon microbead/CuO/Cu [8] and their carbon or organic polymer composites such as C@SnO 2 /Cu 2 O nanosheet [9], Cu 2 O/CuO/Cu/Carbon-polymer composite bers [10], and polypyrrole coated Cu/Cu 2 O [11]. However, the discharge capacity of most of CuO-Li half batteries decays rapidly due to the so-called dead lithium (formed solid electrolyte interphase (SEI) [12]), especially when the amount of CuO is large the Li pulverization is more serious, thus the anode lithium far from commercial battery requirements.…”