Exciton Dissociation into Charge Carriers in Porphyrinic Metal‐Organic Frameworks for Light‐Assisted Li‐O₂ Batteries

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(32)

Published: May 27, 2024

Abstract Light‐assisted Li‐O 2 batteries exhibit a high round‐trip efficiency attributable to the assistance of light‐generated electrons and holes in oxygen reduction evolution reactions. Nonetheless, excitonic effect arising from Coulomb interaction between impedes carrier separation, thus hindering efficient utilization photo‐energy. Herein, porphyrinic metal‐organic frameworks with (Fe Ni)O(COO) 6 clusters are used as photocathodes accelerate exciton dissociation into charge carriers for light‐assisted batteries. The coupling Ni 3d Fe orbitals boosts ligand‐to‐metal cluster transfer, hence drives activates O superoxide ( • − ) radicals, rather than singlet 1 under photoexcitation. These enable low total overvoltage 0.28 V 92% light irradiation 100 mW cm −2 . This work highlights photoelectrochemical processes provides insights photocathode design

Language: Английский

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Superoxide Radical Capture Agent for a Stable and Efficient Li-CO₂ Battery: Experimental and Density Functional Theory Studies

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(11), P. 10324 - 10332

Published: May 24, 2024

The lithium carbon dioxide (Li-CO2) battery is regarded as an attractive electrochemical energy storage system on account of its high density (∼1876 Wh kg–1) and utilization "greenhouse gas" CO2. main discharge product carbonate (Li2CO3) decomposed along with the inevitable formation superoxide radicals (O2•–), it results in irreversible side reactions, such deterioration electrolytes oxidation cathode, which lead to unfavorable cycle life. Herein, sodium lignosulfonate (LSS) introduced a radical capture agent reduce reactivity generated O2•– Li-CO2 battery. Combined adsorption calculation, found that can be preferentially adsorbed LSS. It favors suppression reactions between cathode/electrolyte during charge. discharge/charge voltage gap significantly reduced by 0.23 V long lifespan over 200 cycles. This investigation demonstrates manipulation essential construct stable efficient

Language: Английский

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Recent Advances and Perspectives of High-Entropy Alloys as Electrocatalysts for Metal-Air Batteries

Energy & Fuels, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 29, 2024

Language: Английский

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Unlocking fast kinetics of n–p-type heterostructured MoS₂@PANI photocathode toward robust low-overpotential Li–O₂ batteries

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(12), P. 3538 - 3547

Published: Jan. 1, 2024

Li–O 2 batteries have attracted much attention due to its ultra-high theoretical energy density; however, an overpotential of large charging/discharging limits development.

Language: Английский

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Recent Advances and Practical Challenges in Organic Electrolytes of Sodium-Ion Batteries

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(14), P. 12472 - 12486

Published: June 29, 2024

Sodium-ion batteries (SIBs) are expected to become attractive large-scale energy storage technologies owing their abundant resources and low cost. However, sluggish reaction kinetics at the interface poor thermodynamic stability of organic electrolytes lead inferior cycle/rate performance a density SIBs. The electrolyte engineering, including salt concentration adjustment, molecule design, additive utilization, has been demonstrated effectively optimize solvation structures construct stable interfaces, resulting in accelerated Na+ transport suppressed decomposition. This review focuses on recent advances fundamental design principles terms sodium salts, solvents, functional additives. Furthermore, crucial challenges for SIBs, high operating voltage, wide working temperature range, fast charge rate, discussed. corresponding solution strategies introduced desired high-performance Finally, several perspectives future development presented practical

Language: Английский

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Mechanistic understanding of CO₂ reduction and evolution reactions in Li–CO₂ batteries

Nanoscale, Journal Year: 2024, Volume and Issue: 16(37), P. 17324 - 17337

Published: Jan. 1, 2024

Reaction mechanisms of CO 2 reduction and evolution at cathode/electrolyte interface are discussed, highlighting the relationship between electrochemical performance Li–CO batteries properties different discharge products.

Language: Английский

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Anionic Solvation Transition at Low Temperatures for Reversible Anodes in Lithium–Oxygen Batteries

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 11, 2024

Li-O

Language: Английский

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Cycle Issue and Failure Analysis of Li–N₂ Batteries

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

Language: Английский

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Heavy Atom-Induced Spin–Orbit Coupling to Quench Singlet Oxygen in a Li–O₂ Battery

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

Published: March 19, 2025

Li-O2 batteries have aroused considerable interest due to high theoretical energy density; however, the singlet oxygen (1O2) generated in both discharge and charge processes induces severe parasitic reactions leads their low round-trip efficiency poor rechargeability. Herein, a universal heavy atom-induced quenching mechanism is proposed suppress 1O2 related side reactions. Br tris(4-bromophenyl)amine (TBPA) strong spin-orbit coupling (SOC), enhancing interaction between spin angular momentum orbital of electron. It enables TBPA capture electrophilic form complex then effectively drives spin-forbidden spin-flip process triplet complex. This accelerates conversion ground-state 3O2 through intersystem crossing mechanism, it efficiently eliminates its attack on organic solvents carbon cathodes. These endow battery with reduced overvoltages prolonged lifespan for over 350 cycles when coupled RuO2 catalyst. work highlights SOC quench evolution reaction-related devices.

Language: Английский

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A Redox Mediator Containing Reversible Dynamic Boron–Oxygen Bonds to Construct an Adaptive SEI Layer for Advanced Li–O₂ Batteries

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

Lithium–oxygen (Li–O2) batteries have high theoretical energy density, but the discharge product Li2O2 of Li–O2 is difficult to decompose, resulting in undesirably charging potential. The use soluble redox mediators (RMs) can usually reduce potential batteries, RM on cathode side diffuse Li metal anode and react with it, leading continuous loss causing damage fragile interface. So, it necessary develop a bifunctional mediator (BRM) that simultaneously protect anode. Herein, we introduced 4-bromomethyl-phenylboronic acid (BPLA) as BRM. Br– ions be dissociated from BPLA during cycling serve an effective component RM, thereby significantly facilitating reduction batteries. Meanwhile, boronic groups capability engage cross-linking reactions Li-metal surface, forming flexible solid-electrolyte interphase (SEI) layer. More importantly, SEI layer contains reversible dynamic B–O covalent bond, which possesses characteristic dissociation rearrangement. Thereby shape adaptability, inhibits growth dendrites, suppresses reaction between Li. Consequently, our BPLA, serving BRM, enable achieve stable cycle life 180 cycles under low charge up 4.0 V.

Language: Английский

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