Hydrothermal synthesis and electrochemical performance of CuS@Sisal fiber carbon composite Lithium- ion battery anodes

CuS and Cu2S as Cathode Materials for Lithium Batteries: A Review

“…For example, Ren et al [43b] reported "double-sandwich-like" CuS@reduced graphene oxide, in which CuS nanoparticles were homogeneously dispersed on the surfaces of reduced graphene oxide (rGO) nanosheets via a hydrothermal method. There have also other similar studies [42][43][44][49][50] using rGO, graphene, and carbon materials for CuS and Cu 2 S for nanocomposites and they all showed improved electrochemical performance in LiÀ Cu x S cells. Ren et al [43b] attributed this to the synergistic effect between CuS nanoparticles and rGO nanosheets in CGS hybrids.…”

“…It was believed that the rGO nanosheets have improved the electrical conductivity and structural stability of CSG. There have also other similar studies [42][43][44][49][50] using rGO, graphene, and carbon materials for CuS and Cu 2 S for nanocomposites and they all showed improved electrochemical performance in LiÀ Cu x S cells.…”

“…In their study, a CuS powder was used and the electrolyte was 1 M LiPF 6 in 1 : 1 EC (ethylene carbonate) : DMC (dimethyl carbonate). The researchers clearly noticed that, at 2.1 V, peaks characteristic of Li 2 S slowly emerged and grew rapidly up to the 1.7 V. Copper metal peaks were only found at the lower voltage of 1.7 V. Various low-intensity scattered peaks were observed around the 2.1 V. The researchers assigned these peaks to copper sulfides but did not explicitly identify any of them except for the stronger peak at 2θ = 63°to chalcocite-Cu 2 S. Debart et al [44] further utilized highresolution TEM (HRTEM) and SAED to confirm their findings. The study also revealed two distinct discharge plateaus at 2 V and 1.5 V for CuS.…”

“…In investigating the discharging and charging mechanism for CuS, Debart et al [28] utilized an in situ XRD technique. The researchers clearly noticed that, at 2.1 V, peaks characteristic of Li 2 S slowly emerged and grew rapidly up to the 1.7 V. Copper metal peaks were only found at the lower voltage of 1.7 V. Various low-intensity scattered peaks were observed around the 2.1 V. The researchers assigned these peaks to copper sulfides but did not explicitly identify any of them except for the stronger peak at 2θ = 63°to chalcocite-Cu 2 S. Debart et al [44] Good electronic conductivity of this phase allows Cu nuclei to form away from the carbon current collector (f). [14] Reprinted with permission from Ref.…”

“…Many different nanostructures have been reported for CuS and its composites, such as monoliths (Figure 9a), [40] nanoflakes, [41] hierarchical porous CuS/graphene composites (Figure 9b), [42] CuS nanoparticle/graphene composites (Figure 9c), [43] CuS@sisal fiber carbon composites, [44] nanowires, [45] nanorods (Figure 9d), [38b] and hollow CuS@Mo 2 S microcubes (Figure 9e,f). [46] Similarly, there also have various nanostructures reported for Cu 2 S and its composites as well, such as Figure 8.…”