Pyridinic N‐Dominated Hard Carbon with Accessible Carbonyl Groups Enabling 98% Initial Coulombic Efficiency for Sodium‐Ion Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 5, 2024

Abstract Hard carbon (HC) has been widely regarded as the most promising anode material for sodium‐ion batteries (SIBs) due to its decent capacity and low cost. However, poor initial Coulombic efficiency (ICE) of HC seriously hinders practical application in SIBs. Herein, pyridinic N‐doped hard polyhedra with easily accessible carbonyl groups situ coupled nanotubes are rationally synthesized via a facile pretreated zeolitic imidazolate framework (ZIFs)‐carbonization strategy. The comprehensive ex/in techniques combined theoretical calculations reveal that synergy pyridinic‐N promoted by pretreatment carbonization process would not only optimize Na + adsorption energy but also accelerate desorption , significantly suppressing irreversible loss. As result, as‐synthesized an can deliver unprecedented high ICE 98% large reversible 389.4 mAh g −1 at 0.03 A . This work may provide effective strategy structural design ICE.

Language: Английский

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Rational manipulation of electrolyte to induce homogeneous SEI on hard carbon anode for sodium-ion battery

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: 94, P. 414 - 429

Published: March 9, 2024

Language: Английский

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Molecular‐Level Design of High Flash Point Solvents Enables High‐Safety and Dual‐Function Chemical Presodiation of Hard Carbon and Alloy Anodes for High‐Performance Sodium‐Ion Batteries

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(24)

Published: April 1, 2024

Abstract Hard carbon (HC) is subjected to low initial Coulombic efficiency (ICE) and unsteady solid electrolyte interphase (SEI), which limits the energy density cycling performance. Meanwhile, studies related emerging chemical presodiation have specifically focused on proper redox potential overlooked its safety hazard. To address these drawbacks of HC presodiation, a series high‐safety solutions based tetraethylene glycol dimethyl ether (TEGDME) are proposed for uniform fast Bi anodes. Among them, Na‐4‐methylbiphenyl in TEGDME solution exhibits lowest (0.146 V vs Na + /Na), achieves inhibition irreversible sodium uptake. Meantime, potential‐driven decomposition fluoroethylene carbonate endows presodiated (pNa‐HC) fast‐ion conducting robust F‐rich SEI. Accordingly, pNa‐HC delivers an ideal ICE 99.1% compared (65.28%). significantly enhanced rate performance life (193.39 mAh g −1 after 2300 cycles at 1000 mA ) benefiting from reduced kinetic barriers. When pairs with 3 2 (PO 4 cathode, full cell demonstrates desirable 91.25%. This work provides novel universal solvent design strategy realize pre‐metallation.

Language: Английский

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Performance degradation mechanisms and mitigation strategies of hard carbon anode and solid electrolyte interface for sodium-ion battery

Nano Energy, Journal Year: 2024, Volume and Issue: 128, P. 109920 - 109920

Published: June 28, 2024

Language: Английский

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Pore Structure in Hard Carbon: from Recognition to Regulation

Energy storage materials, Journal Year: 2025, Volume and Issue: unknown, P. 104068 - 104068

Published: Jan. 1, 2025

Language: Английский

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Lignin derived hard carbon for sodium ion batteries: Recent advances and future perspectives

Progress in Materials Science, Journal Year: 2025, Volume and Issue: unknown, P. 101452 - 101452

Published: Feb. 1, 2025

Language: Английский

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Bacteria‐Derived Carbon Composite Anode for Highly Durable Lithium‐Ion Storage Enabled by Heteroatom Doping and Pore Construction

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

Published: Feb. 12, 2025

Abstract Bacteria‐derived carbon anode materials have shown appealing potential for advanced energy storage applications due to their low cost and good sustainability. However, the few intrinsic defects, sluggish transmission dynamics, capacity become main bottleneck further development. Herein, study designs a highly B, N co‐doped mesoporous (BNMC)/staphylococcus aureus‐derived (SAC) composite via facile assembly route, followed by boron‐doping. Enabled heteroatom doping pore construction, resulting BNMC/SAC lithium‐ion batteries demonstrates high reversible of 621.77 mAh g −1 at 200 mA even after 500 cycles, an excellent rate performance 405.14 2 A . Importantly, in situ/ex situ characterizations theoretical simulation results unveil that co‐doping along with small amount P can significantly increase defects BNMC/SAC, thus providing more active sites storage. Furthermore, these structural features are conducive improving interfacial stability whole electrode, achieving thin uniform SEI film. The multi‐component strategy engineering presents scalable approach enhancing transfer dynamics carbon‐based electrode low‐cost

Language: Английский

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Multi boron-doping effects in hard carbon toward enhanced sodium ion storage

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 1, 2024

Language: Английский

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Precise control of the resin-based hard carbon pseudo graphite and closed pores structure to enhance sodium storage capacity

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 686, P. 136 - 150

Published: Jan. 29, 2025

Language: Английский

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Redefining closed pores in carbons by solvation structures for enhanced sodium storage

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: April 16, 2025

Closed pores are widely accepted as the critical structure for hard carbon negative electrodes in sodium-ion batteries. However, lack of a clear definition and design principle closed leads to undesirable electrochemical performance electrodes. Herein, we reveal how evolution pore mouth sizes determines solvation thereby redefine pores. The precise uniform control is achieved by using molecular sieves model material. We show when inaccessible N2 but accessible CO2 probes, only portion solvent shells removed before entering contact ion pairs dominate inside When namely smaller than 0.35 nm, mostly sieved dominated anion aggregates produce thin inorganic NaF-rich solid electrolyte interphase accordingly redefined, initial coulombic efficiency, cycling low-temperature largely improved. Furthermore, that intrinsic defects redefined effectively shielded from interfacial passivation contribute increased low-potential plateau capacity.

Language: Английский

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