Atomic Co/Ni active sites assisted MOF-derived rich nitrogen-doped carbon hollow nanocages for enhanced lithium storage

Single metal atoms catalysts—Promising candidates for next generation energy storage and conversion devices

“…In the work conducted by Lei and colleagues, LIB with carbonsupported Co/Ni dual SAs serving as the anode showed a remarkable reversible capacity of 462.1 mAh/g at 0.5 A/g after 500-cycle operations, and a good rate capability from 0.1 to 2 A/g with a slow capacity decay. 144 Detailed characterizations revealed the outstanding performance (I) Rate performance of Fe-NC@S, Pt-NC@S, Ru-NC@S, Ni-NC@S, Ge-NC@S, and Mn-NC@S. Source: Reproduced with permission. 116 Copyright 2020, Wiley-VCH originated from the atomic Co and Ni dual active sites that promoted Li insertion/extraction by strengthening Li affinity and optimizing the Li absorption behavior.…”

“…With the new synthesis strategies flourishing, a series of SMACs have been discovered in succession and identified to exhibit excellent performance for versatile catalytic reactions, such as ORR, 81,133–135 FAOR, 52 MOR, 136 CO 2 RR, 137–139 and oxygen evolution reaction (OER) 140 as well as the polysulfides or polyselenides conversion 141,142 . Moreover, a number of SMACs have been reported to show unconventionally excellent alkali metal storage behavior, 143 thus enabling them great potential for applications 144 in energy devices, including but not limited to fuel cells, metal‐ion batteries, metal‐air batteries, metal‐CO 2 batteries, metal‐sulfur batteries, metal‐selenium batteries, and supercapacitors. Although the rapid development in the past few years has witnessed the advantages of SMACs in energy devices, there are several challenges that need to be solved on timely basis, such as the detestable aggregation during the electrochemical reactions causing severe activity loss, the undesirable side reactions (like Fenton reactions giving rise to poor durability), the lack of in‐depth understanding on catalytic mechanisms of SMACs and the role of their coordination microenvironment in catalytic reactions as well as the precise modulation for SMACs active sites, together with the requirement of advanced techniques to integrate SMACs with other materials to form a stable electrode, and so forth.…”

“…With the new synthesis strategies flourishing, a series of SMACs have been discovered in succession and identified to exhibit excellent performance for versatile catalytic reactions, such as ORR, 81,[133][134][135] FAOR, 52 MOR, 136 CO 2 RR, [137][138][139] and oxygen evolution reaction (OER) 140 as well as the polysulfides or polyselenides conversion. 141,142 Moreover, a number of SMACs have been reported to show unconventionally excellent alkali metal storage behavior, 143 thus enabling them great potential for applications 144 in energy devices, including but not limited to fuel cells, metal-ion batteries, metal-air batteries, metal-CO 2 batteries, metal-sulfur batteries, metal-selenium batteries, and supercapacitors. Although the rapid development in the past few years has witnessed the advantages of SMACs in energy devices, there are several challenges that need to be solved on timely basis, such as the detestable aggregation during the electrochemical reactions causing severe activity loss, the undesirable side reactions (like Fenton reactions giving rise to poor Abbreviations: AAS, atomic absorption spectra; BDC, terephthalic acid; COF, covalent organic framework; EDX, energy dispersive X-ray spectroscopy; ICP, inductively coupled plasma; ICP-AES, inductively coupled plasma atomic emission spectroscopy; ICP-MS, inductively coupled plasma mass spectrometry; ICP-OES, inductively coupled plasma optical emission spectrometer; NBP, N-doped Black Pearl; STEM, scanning transmission electron microscopy; STEM-EELS, scanning transmission electron microscopy-electron energy-loss spectroscopy; XPS, X-ray photoelectron spectrum; ZSM-5, zeolite socony mobil-5.…”

Recent Advances in Antimony Sulfide-Based Nanomaterials for High-Performance Sodium-Ion Batteries: A Mini Review

“…The final obtained composites were denoted as SS/Sb@C. When evaluated as electrode materials for SIBs ( Supplementary Figure S2F ), SS/Sb@C delivered a reversible capacity of 474.6 mA h g −1 and a capacity retention rate of 97.1% after 200 cycles at 0.1 A g −1 , showing better cyclic stability and superior rate capability than those of the Sb 2 S 3 anodes without heteroatoms (38.6 mA h g −1 ). This was due to the double control synergy of Sb-shell structure and S-doped carbon structure, which effectively expanded the polysulfide diffusion path, enhanced the reversibility of conversion reaction, and thus improved the Na-storage capacity of SIBs ( Yu et al, 2020 ; Wang et al, 2021b ). This kind of reasonable design was expected to bring bright prospects for the design of metal sulfides as advanced anodes of SIBs.…”

Metal–organic framework-derived MCF/PPy/MoS2 hybrid nanocomposites as an anode for lithium-ion batteries

“…18,19 The organic ligands in MOFs also usually contain N heteroatoms that enable in situ doping of carbon and nitrogen elements, thus improving the conductivity of MOF-based materials. 20,21 However, MOFs typically suffer from low intrinsic conductivities and poor structural stabilities. 22,23 As such, MOFs decorated with conductive carbon sources, such as polymers 24,25 and graphene, 26,27 have been employed as carbon matrixes to improve the lithium-ion and charge transfer efficiencies.…”