Long-Lasting Zinc–Iodine Batteries with Ultrahigh Areal Capacity and Boosted Rate Capability Enabled by Nickel Single-Atom Electrocatalysts

Nano Letters, Journal Year: 2023, Volume and Issue: 23(11), P. 5272 - 5280

Published: June 1, 2023

Zinc-iodine (Zn-I2) batteries have garnered significant attention for their high energy density, low cost, and inherent safety. However, several challenges, including polyiodide dissolution shuttling, sluggish iodine redox kinetics, electrical conductivity, limit practical applications. Herein, we designed a highly efficient electrocatalyst Zn-I2 by uniformly dispersing Ni single atoms (NiSAs) on hierarchical porous carbon skeletons (NiSAs-HPC). In situ Raman analysis revealed that the conversion of soluble polyiodides (I3- I5-) was significantly accelerated using NiSAs-HPC because remarkable electrocatalytic activity NiSAs. The resulting with NiSAs-HPC/I2 cathodes delivered exceptional rate capability (121 mAh g-1 at 50 C), ultralong cyclic stability (over 40 000 cycles C). Even under 11.6 mg cm-2 iodine, still exhibited an impressive capacity retention 93.4% 141 after 10 C.

Language: Английский

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Single‐atom materials: The application in energy conversion

Interdisciplinary materials, Journal Year: 2024, Volume and Issue: 3(1), P. 74 - 86

Published: Jan. 1, 2024

Abstract Single‐atom materials (SAMs) have become one of the most important power sources to push field energy conversion forward. Among main types energy, including thermal electrical solar and biomass SAMs realized ultra‐high efficiency show an appealing future in practical application. More than high activity, uniform active sites also provide a convincible model for chemists design comprehend mechanism behind phenomenon. Therefore, we presented insightful review application single‐atom material conversion. The challenges (e.g., accurate synthesis application) directions machine learning efficient design) applications are included, aiming guidance research next step.

Language: Английский

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Energizing Robust Sulfur/Lithium Electrochemistry via Nanoscale-Asymmetric-Size Synergism

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 28, 2025

Sluggish redox kinetics and dendrite growth perplex the fulfillment of efficient electrochemistry in lithium–sulfur (Li–S) batteries. The complicated sulfur phase transformation sulfur/lithium diversity necessitate an all-inclusive approach catalyst design. Herein, a compatible mediator with nanoscale-asymmetric-size configuration by integrating Co single atoms defective CoTe2–x (CoSA-CoTe2–x@NHCF) is elaborately developed for regulating synchronously. Substantial theoretical analyses reveal that exhibits higher catalytic activity long-chain polysulfide Li2S decomposition, while monodispersed sites are more effective boosting reduction to regulate deposition. Such cascade catalysis endows CoSA-CoTe2–x@NHCF all-around service "trapping-conversion-recuperation" species during whole reaction. Furthermore, it demonstrated situ transmission electron microscopy initially formed electronic-conductive ionic-conductive Li2Te provide sufficient lithiophilic homogeneous Li plating stripping markedly suppressed growth. Consequently, coupling interlayer Li@CoSA-CoTe2–x@NHCF anode, constructed Li–S full batteries deliver superior cycling stability rate performance, flexible pouch cell stable performance at 0.3 C. gained insights into synergistic effect asymmetric-size structures pave way integrated design advanced systems.

Language: Английский

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Co single-atom catalyst on ordered macro–microporous structure as separator for Li-S battery

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 684, P. 189 - 196

Published: Jan. 11, 2025

Language: Английский

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Structural Regulation Strategies of Atomic Cobalt Catalysts for Oxygen Electrocatalysis

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Abstract Oxygen electrocatalysis is a core reaction in renewable energy devices, greatly promoting the transformation and upgrading of structure. Nonetheless, performance conversion devices hindered by large overpotential slow kinetics oxygen electrocatalytic reactions. Recently, single‐atom catalysts (SACs) have emerged as promising contenders field because their exceptional metal atom utilization, distinctive coordination environment, adjustable electronic properties. This review presents latest advancements design Co‐based SACs for electrocatalysis. First, OER ORR mechanisms are introduced. Subsequently, strategies regulating structure summarized three aspects, including centers, support carriers. A particular emphasis given to relationship between properties catalysts. Afterward, applications explored. Ultimately, challenges prospects prospected.

Language: Английский

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Designing metal sulfide-based cathodes and separators for suppressing polysulfide shuttling in lithium-sulfur batteries

Nano Research, Journal Year: 2023, Volume and Issue: 17(4), P. 2574 - 2591

Published: Nov. 3, 2023

Language: Английский

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Theory-guided optimization of coordination sites via d-band modulation for efficient single-atomic Li–S catalysis

Energy storage materials, Journal Year: 2024, Volume and Issue: 70, P. 103458 - 103458

Published: May 10, 2024

Language: Английский

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Understanding the chemistry of mesostructured porous nanoreactors

Nature Reviews Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 23, 2024

Language: Английский

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Rational Design of Janus Metal Atomic‐Site Catalysts for Efficient Polysulfide Conversion and Alkali Metal Deposition: Advances and Prospects

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(25)

Published: Feb. 1, 2024

Abstract Although metal–sulfur batteries (M–S batteries, M = Li, Na, K) are promising next‐generation energy‐storage devices because of ultrahigh theoretical energy density, low cost, and environmentally friendliness, their practical applications significantly hindered by the shuttle effect polysulfides growth alkali metal dendrites. These issues can be mitigated using Janus atomic‐site catalysts, which possess maximum atom utilization efficiency (≈100%), adjustable electronic structures, tailorable catalytic sites, thereby effectively improving electrochemical performance M–S batteries. In this review, recent progress development atomic‐sites on properties, synthesis, characterizations reviewed. Then, advances in catalysts intended for accelerating polysulfide conversion regulating deposition, briefly introducing working principles systematically summarized. Furthermore, a high emphasis is placed effective regulation strategies rational design Finally, current challenges future research directions also presented to develop high‐efficiency high‐energy

Language: Английский

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Coordinatively Unsaturated Co Single-Atom Catalysts Enhance the Performance of Lithium–Sulfur Batteries by Triggering Strong d–p Orbital Hybridization

ACS Nano, Journal Year: 2024, Volume and Issue: 18(45), P. 31123 - 31134

Published: Oct. 28, 2024

The catalytic activities displayed by single-atom catalysts (SACs) depend on the coordination structure. SACs supported carbon materials often adopt saturated structures with uneven distributions because they require high-temperature conditions during synthesis. Herein, bisnitrogen-chelated Co that are coordinatively unsaturated prepared integrating a complex into conjugated microporous polymer (CMP-CoN2). Compared analogues, i.e., tetranitrogen-chelated (denoted as CMP-CoN4), CMP-CoN2 exhibits higher electrocatalytic activity in polysulfide conversions due to an enhanced hybridization between 3d orbitals of atoms and 3p S polysulfide. As result, sulfur cathodes CoN2 deliver outstanding performance metrics, including high specific capacity (1393 mA h g–1 at 0.1 C), superior rate (673.2 6 low decay (of only 0.045% per cycle 2 C over 1000 cycles). They also outperform contain CMP-CoN4 or CMPs devoid SACs. This work reveals how is affected their structures, rules underpin structure–activity relationship may be extended designing electrocatalysts for use other applications.

Language: Английский

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