Stacked Cu2−xSe nanoplates with 2D nanochannels as high performance anode for lithium batteries

Hetero-Phase MoO2/Cu2–xSe Nanocomposites Distributed in Porous Octahedral Carbon Networks for High-Performance Lithium Storage

“…The peak at 0.6 V is ascribed to the solid electrolyte interphase (SEI) film generated during the reaction process, which inevitably leads to an initial capacity loss. In subsequent cycles, two pairs of redox peaks at 1.24/1.43 and 1.65/1.90 V represent reversible conversion reactions in MoO 2 and Li x MoO 2 , and corresponding reaction equations are MoO 2 + 4Li + + 4e – → Mo + 2Li 2 O and Li x MoO 2 + (4 – x )­Li + + (4 – x )­e – → 2Li 2 O + Mo. , Besides, another two pairs of redox peaks at 1.48/1.74 and 2.00/2.23 V illustrate reversible conversion reactions in Cu 2– x Se, and the corresponding reaction equations are Cu 2– x Se + y Li + y e – → Li y Cu 2– x Se and Li y Cu 2– x Se + (2 – y )­Li + + (2 – y )­e – → (2 – x )Cu + Li 2 Se. , The peak transfer in subsequent scanning cycles is probably ascribed to the structural changes of the active components during the first cycle. However, the CV curves coincide well in the second and third cycles, and the peak at 0.6 V disappears, indicating the excellent reversibility and cyclic stability of the MoO 2 /Cu 2– x Se@C composite as the LIB anode.…”

“…Here, we also use NENU-800 as an example to analyze the cyclic voltammetry (CV) and voltage-capacity curves. As shown in Figure a, the CV curves for the initial three cycles were measured under the conditions of a scanning speed of 0.1 mV s –1 and a voltage window of 0.01–3.00 V. In the first cathodic scan, broad peaks at 1.96 and 1.35 V correspond to the insertion of Li + into MoO 2 to form Li x MoO 2 and subsequent conversion to Mo, , while a broad peak at 2.04 V and a shoulder peak at 1.47 V can be attributed to phase transformation from Cu 2– x Se to Li x Cu 2– x Se and further conversion to Cu . The peak at 0.6 V is ascribed to the solid electrolyte interphase (SEI) film generated during the reaction process, which inevitably leads to an initial capacity loss.…”

Smart Fibers and Textiles for Personal Thermal Management in Emerging Wearable Applications

“…While among various semiconductor compounds, copper chalcogenide compounds (Cu 2‐ x e, e = S, Se, Te) have fine‐tuning local surface plasmon resonance effect and high absorption capacity in NIR region. It is reported that heavily doped Cu 2‐ x Se nanocrystals [ 84–88 ] show strong NIR absorption ability. Cheng et al.…”

“…While among various semiconductor compounds, copper chalcogenide compounds (Cu 2-x e, e = S, Se, Te) have fine-tuning local surface plasmon resonance effect and high absorption capacity in NIR region. It is reported that heavily doped Cu 2-x Se nanocrystals [84][85][86][87][88] show strong NIR absorption ability. Cheng et al prepared anionic waterborne polyurethane (WPU)/Cu 2-x Se nanocomposites for multifunctional cotton fabrics by coating and hot pressing.…”

A mini-review focusing on ambient-pressure chemical vapor deposition (AP-CVD) based synthesis of layered transition metal selenides for energy storage applications

“…[27][28][29][30][31][32][33][34][35] Therefore, these materials are used in electronics, catalysis, photovoltaics, and batteries. [36][37][38][39][40][41][42][43][44] Often, layered TMDCs have different polymorphs, such as 1T, 2H, and 3R (trigonal, hexagonal, and rhombohedral phases, respectively, as shown in Fig. 1(a)-(c)).…”