MOF-derived bi-metal embedded N-doped carbon polyhedral nanocages with enhanced lithium storage

Abstract

Co–Zn/N–C polyhedral nanocages: porous bimetallic Co/Zn embedded N-doped carbon (Co–Zn/N–C) polyhedral nanocages have been synthesized through annealing a ZIF-8@ZIF-67 precursor for the first time. The excellent lithium-storage ability is attributed to the unique structure of Co–Zn/N–C.

Construction of Nitrogen‐Doped Carbon‐Coated MoSe2 Microspheres with Enhanced Performance for Lithium Storage

“…Currently,t here are several works focused on synthesis of MoSe 2 nanostructures including nanosheets, nanotubes, and microspheres. [32][33][34][35][36][37][38][39] However, to date, there are few reports on the combination of N-C layer and MoSe 2 microspheres. According to the research in recent years, the single nanostructure design of MoSe 2 could not improvet he performance comprehensively.I tn eeds to mutually cooperate with conductive design, which can enhance the transfer of electron further boosting the electrochemical performance.…”

Carbon Necklace Incorporated Electroactive Reservoir Constructing Flexible Papers for Advanced Lithium–Ion Batteries

“…To further study the chemical states of metals, spectra of Co 2p and Fe 2p were also analyzed. As shown in Figure c, three notable peaks at 795.9, 781.4, and 776.6 eV in the Co 2p spectrum indicate the presence of Co as Co (0) . Besides, the peak at 779.1 eV is ascribed to CoN bond with ignorable deviation .…”

“…The chemical composition and oxidization states of the as‐prepared ZCNP and MCNP were examined by X‐ray photoelectron spectroscopy (XPS). The N1s region spectrum of the carbon necklace paper ZCNP was analyzed ( Figure a), displaying three resolved peaks in the form of pyridinic‐N (398.4 eV), pyrrolic‐N (399.8 eV), and graphitic‐N (a broad weak) peak at 400.8 eV . Among them, N‐containing functional groups such as pyridinic‐N and pyrrolic‐N in N‐doped carbon fibers act as active sites in various electrochemical applications .…”

Unusual Formation of CoO@C “Dandelions” Derived from 2D Kagóme MOLs for Efficient Lithium Storage

“…[5][6][7] However, the undesired volume expansion of cobalt oxides leads to the destruction of electrodes, accompanied by rapid capacity fading during repeated lithium ion insertion/extraction processes; additionally, their poor electrical conductivity causes weak rate capability. [13][14][15][16][17][18] As a Despite great breakthroughs, the search for anode materials with high performance for lithium-ion batteries (LIBs) remains challenging. [4,[10][11][12] To this end, one of the most effective strategies is confining or embedding TMOs into a carbonaceous matrix to form hybrids, which can accommodate large volume changes, improve electrical conductivity, and maintain the integrity of the electrode.…”

“…[13][14][15][16][17][18] As a Despite great breakthroughs, the search for anode materials with high performance for lithium-ion batteries (LIBs) remains challenging. They serve as precursors for facile transformation into hybrid structures including composites of metal oxides/carbon, metal phosphides/carbon, or metal sulfides/carbon after thermal treatment under appropriate atmospheres.…”