Facile hydrothermal synthesis of ternary Ni–Co–Se/carbon nanotube nanocomposites as advanced electrodes for lithium storage

Abstract

Ternary Ni-Co-Se/carbon nanotube nanocomposites have been successfully prepared via a one-step hydrothermal strategy. When used as electrode materials for lithium-ion batteries, the Ni-Co-Se/CNT composite exhibits good lithium storage performances including excellent cycling stability and outstanding specific capacity, good cycling stability, and high initial coulombic efficiency. A high specific capacity of 687.8 mA h g À1 after 100 charge-discharge cycles at a current density of 0.5 A g À1 with high cycling stability is achieved. The excellent battery performance of Ni-Co-Se/CNT should be attributed to the synergistic effect of Ni and Co ions and the formed network structure.

Fabrication of Nonmetal-Modulated Dual Metal–Organic Platform for Overall Water Splitting and Rechargeable Zinc–Air Batteries

“…The peaks at 2θ = 33.9, 45.1, 51.1, and 53.8° can be indexed to (202), (204), (020), and (002) crystalline plane of NiSe (JCPDS card no. 00-041-1495), respectively . The XRD pattern of Fe-doped MOF ZnNiCoSe@CC compared to pure ZnSe, NiSe, and CoSe, small peak shifts, and intensity changes occur in Fe-doped MOF ZnNiCoSe@CC owing to the presence of Co, Ni, and Fe atoms in the MOF ZnNiCoPBA@CC and their sequential transformation into a new phase.…”

“…00-041-1495), respectively. 51 The XRD pattern of Fe-doped MOF ZnNiCoSe@CC compared to pure ZnSe, NiSe, and CoSe, small peak shifts, and intensity changes occur in Fe-doped MOF ZnNiCoSe@ CC owing to the presence of Co, Ni, and Fe atoms in the MOF ZnNiCoPBA@CC and their sequential transformation into a new phase. This causes only a small change in the crystalline structure with the introduction of the Fe atom because the atomic radii are very similar.…”

“…Meanwhile, CoSe XRD peaks are located at 2θ = 30.6, 34.3, 36.2, 43.8, 47.9, 53.2, and 63.6° corresponding to (101), (111), (200), (121), (211), (031), and (122) planes of CoSe (JCPDS card no. 00-053-0449), respectively . The peaks at 2θ = 33.9, 45.1, 51.1, and 53.8° can be indexed to (202), (204), (020), and (002) crystalline plane of NiSe (JCPDS card no.…”

“…00-053-0449), respectively. 51 The peaks at 2θ = 33.9, 45.1, 51.1, and 53.8°c an be indexed to (202), ( 204), (020), and (002) crystalline plane of NiSe (JCPDS card no. 00-041-1495), respectively.…”

Constructing CNT@NiCo Texture Anchoring Pt Nanoparticle Catalyst for Highly Efficient Methanol Electrocatalytic Oxidation**

“…Figure S4 shows the TEMs of CNT (A), CNT@NiCo‐s (B), and CNT@NiCo‐g (C), and no obvious NiCo particles are seen in the TEM. In addition, among the carbonaceous materials, carbon nanotubes (CNT) have been recognized as a promising candidate as the anodes of carrier material due to their benefits, including high electrical conductivity, chemical stability and large specific surface area [18] . From Figure 3(A1), (B1) and (C1), the loading of Pt on the untreated carbon nanotubes is very small, but the Pt/CNT@NiCo composite shows excellent loading capacity and also shows a good plum blossom morphology.…”