Construction of a Fluoride‐Free and High‐Voltage Lithium Metal Battery with a Li₃N/Li₂O Heterostructure Solid Electrolyte Interface

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

Published: Feb. 13, 2025

Abstract Currently, the design of lithium metal batteries primarily focuses on improving cycling stability by increasing fluoride (LiF) content in interfacial layer. However, extensive use fluorides poses severe environmental concerns. In this study, a novel strategy is proposed to construct Li 3 N/Li 2 O heterostructure via situ decomposition perchlorate (LiClO 4 ) and nitrate (LiNO ), replacing role LiF SEI. This unique combines excellent lithium‐ion transport capability with robust electronic insulation properties, effectively preventing electron tunneling phenomena. When paired NCM811 cathode, Li||NCM811 full cell exhibits exceptional electrochemical performance, including outstanding charge–discharge capabilities under extreme temperatures. At 60 °C 1C conditions, battery retains 82.11% its capacity after 500 cycles; at 25 1C, it maintains retention rate 80.61% 800 cycles. Furthermore, practical application conditions (100 µm anode, N/P ratio 3.09, 1.5 Ah pouch cell), fluorine‐free (LMB) 77.93% 100 cycles, demonstrating superiority value strategy.

Language: Английский

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Engineering an Inorganic-Rich Interphase with Versatile Nonflammable Electrolytes toward Stable Alkali Metal Batteries

ACS Materials Letters, Journal Year: 2025, Volume and Issue: unknown, P. 1127 - 1134

Published: Feb. 21, 2025

Language: Английский

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Lattice Reconstruction Engineering Boosts the Extreme Fast Charging/Discharging Performance of Nickel-Rich Layered Cathodes

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 27, 2025

The low specific capacity and the poor retention at extreme fast charging/discharging limit nickel-rich layered cathode commercialization in electric vehicles, root causes are interface instability loss induced by birth defects irreversible phase transition. In this work, we propose a lattice reconstruction strategy combining polyvinylpyrrolidone-assisted wet chemistry calcination to prepare aluminum-modified LiNi0.83Co0.11Mn0.06O2 (ANCM). Our method offers distinct advantages tailoring (residual alkali rocksalt phase), reducing Li vacancies oxygen vacancies, exhibiting gradient Ni concentration distribution, suppressing Li/Ni intermixing defects, lowering strain before after recycling, inhibiting microcracks. ANCM constructs robust crystal lattices delivers an initial discharge of 155.3 mAh/g with 89.2% 200 cycles 5 C. This work highlights importance synthesis design structural modification for materials.

Language: Английский

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LiF‐Rich Cathode Electrolyte Interphases Homogenizing Li⁺ Fluxes toward Stable Interface in Li‐Rich Mn‐Based Cathodes

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

Published: March 5, 2025

Constructing a stable cathode-electrolyte interphase (CEI) is crucial to enhance the battery performance of Li-rich Mn-based oxide (LMO) cathodes. To achieve an ideal CEI, gas-phase fluorination technique proposed pre-structure robust LiF layer (≈1 nm) on LMO surface. The designed effectively modulates electric field distribution electrode surface and mitigates undesirable side reactions between electrolyte, thereby promoting formation uniform LiF-rich CEI LMO-F-1. optimized facilitates homogeneous Li+ fluxes across enhances diffusion in during (de)intercalation, contributing electrode-electrolyte interface. Moreover, suppresses decomposition lithium salts electrolyte reduces autocatalytic triggered by by-products. In addition, it improves structural stability increasing energies oxygen manganese vacancies. As result, modified with retains 95% its initial capacity after 100 cycles, demonstrating remarkable electrochemical stability. flux homogenization strategy offers promising avenue for enhancing interface high-voltage cathode materials storage.

Language: Английский

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Molecule polarity and steric hindrance design to nominate organosilicon additive for high-voltage LiCoO2

Energy storage materials, Journal Year: 2025, Volume and Issue: unknown, P. 104177 - 104177

Published: March 1, 2025

Language: Английский

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