Sieving pore design enables stable and fast alloying chemistry of silicon negative electrodes in Li-ion batteries DOI Creative Commons
Jiaxing He, Yuanxin Deng,

Junwei Han

и другие.

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Май 25, 2025

Ideal silicon negative electrodes for high-energy lithium-ion batteries are expected to feature high capacity, minimal expansion, long lifespan, and fast charging. Yet, engineered materials face a fundamental paradox associated with particle deformation charge transfer, which hinders the industrial use of advanced electrode materials. Here we show sieving-pore design carbon supports that overcomes these mechano-kinetic limitations enable stable, (de)alloying chemistries electrodes. Such structure features an inner nanopore body reserved voids accommodate high-mass-content outer sub-nanopore entrance induce both pre-desolvation intrapore transport ions during cycling. Importantly, sieving effect yields inorganic-rich solid electrolyte interphases mechanically confine in-pore silicon, producing stress-voltage coupling mitigates formation detrimental crystalline Li15Si4. As result, this enables low expansion (58% at specific capacity 1773 mAh g-1 areal 4 cm-2), initial/cyclic Coulombic efficiency (93.6%/99.9%), decay (0.015% per cycle). A practical pouch cell such delivers 80% retention over 1700 cycles 2 as well 10-min charging capability.

Язык: Английский

High‐Performance Silicon Anodes Enabled by Multifunctional Ultrafine Silica Nanoparticle‐Embedded Carbon Coatings for Lithium‐Ion Batteries DOI Open Access
Zhefei Sun,

Quanzhi Yin,

Shenghui Zhou

и другие.

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 17, 2025

Abstract Silicon (Si) holds immense promise as viable anode for next‐generation high‐energy‐density Li‐ion batteries (LIBs). However, its poor ionic/electronic conductivity and significant volumetric changes during cycling lead to rapidly deteriorated LIB performance. Here, a novel multifunctional coating featuring ultrafine SiO 2 nanoparticles (<7 nm) embedded carbon on Si (termed Si@uSiO ‐C) resolve these challenges is proposed. This unique uSiO ‐C provides high‐efficient electron ion transport pathways, while also improves interfacial stability mitigates volume cycling, thereby enhancing the structural integrity of ‐C, corroborated by extensive experimental computational studies. In addition, abundant interfaces in facilitate Li + evenly distributed impart high electrochemical reactivity mechanical robustness. Consequently, achieves reversible capacity 2093 mAh g −1 at 0.2 A , with initial Coulombic efficiency 88.3%, superior rate capability durability (1000 cycles, 928 1.0 75% retention). Full cells paired commercial LiFePO 4 cathodes demonstrate cyclability, maintaining 80% retention over 500 cycles C. work highlights vital role promoting performance Si‐based anodes high‐performance LIBs.

Язык: Английский

Процитировано

4
Co‐Assembly of Polyoxometalates and Porphyrins as Anode for High‐Performance Lithium‐Ion Batteries DOI
Yanchun Liu, Xianggang Zhou, Tianyu Qiu

и другие.

Advanced Materials, Год журнала: 2024, Номер 36(35)

Опубликована: Июнь 25, 2024

Polyoxometalates (POMs) have been considered one of the most promising anode candidates for lithium-ion batteries (LIBs) in virtue their high theoretical capacity and reversible multielectron redox properties. However, poor intrinsic electronic conductivity, low specific surface area, solubility organic electrolytes hinder widespread applications LIBs. Herein, a novel hybrid nanomaterial is synthesized by co-assembling POMs porphyrins (PMo

Язык: Английский

Процитировано

13
The future of carbon anodes for lithium-ion batteries: The rational regulation of graphite interphase DOI Creative Commons

Bin Cao,

Mengjiao Du,

Zirong Guo

и другие.

Carbon Future, Год журнала: 2024, Номер unknown, С. 9200017 - 9200017

Опубликована: Авг. 1, 2024

Язык: Английский

Процитировано

10
Electrolyte design weakens lithium-ion solvation energy for a fast-charging and long-cycling Si anode DOI Creative Commons
Min Li, Shuai Li, Yan Dong

и другие.

Chemical Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Silicon (Si) is considered a promising anode material for next-generation lithium-ion batteries due to its high theoretical specific capacity and earth-abundancy. However, challenges such as significant volume expansion, unstable solid electrolyte interphase (SEI) formation in incompatible electrolytes, slow transport lead poor cycling rate performance. In this work, it demonstrated that superior cyclability capability of Si anodes can be achieved using ethyl fluoroacetate (EFA) fluoroethylene carbonate (FEC) solvents with low binding energy Li+ but sufficiently relative dielectric constants. By weakening the interaction between solvent, barrier desolvation process lowered, while ensuring conductivity diffusion Li+. As result, silicon-carbon optimized exhibits excellent performance, work reversibly 1709.1 mAh g-1 proceeds over 250 cycles retains 85.2% at 0.2C. Furthermore, Si/C‖LiFePO4 (LFP) full cell shows an extended service life more than 500 cycles. This offers valuable insights into design weakly solvating electrolytes high-performance Si-based batteries.

Язык: Английский

Процитировано

1
Enhancement Mechanism of Photo‐Induced Artificial Boundary on Ultrastable Hybrid Solid‐electrolyte Interphase of Si Anodes DOI Open Access
Zeyu Xu,

Z.‐D. LIU,

Haibo Shao

и другие.

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 26, 2025

Abstract Unstable solid‐electrolyte interphase (SEI) film resulting from chemically active surface state and huge volume fluctuation limits the development of Si‐based anode materials in lithium‐ion batteries. Herein, a photo‐initiated polypyrrole (PPy) coating is manufactured on Si nanoparticles to guide situ generation PPy‐integrated hybrid SEI (hSEI). The hSEI shows excellent structure stability optimized component composition for lithium storage. More promisingly, precursor with more uniform thickness, stronger interaction inner particles, higher mechanical strength further enables structural integrity film. highly ordered interchain can maintain effective Li + transport during electrochemical cycling. Consequently, SiNPs@hSEI‐L maintains reversible capacity 1044.7 mAh g −1 after 500 cycles at 2 A , manifesting superior This work proposes novel polymer‐integrated formation provides an reference optimization semiconductor materials.

Язык: Английский

Процитировано

1
Binder-enabled cross-scale stabilization of high-areal-capacity micro-sized silicon anodes for high-voltage lithium-ion batteries DOI

Kangjia Hu,

Jiaxin Chen, Jiahui Zhang

и другие.

Energy storage materials, Год журнала: 2025, Номер unknown, С. 104029 - 104029

Опубликована: Янв. 1, 2025

Язык: Английский

Процитировано

1
Integrating robust SEI on recycled micro-sized silicon scrap for stable lithium ion battery DOI
Haoyu Ma,

Baogang Zhao,

Zhuobin Han

и другие.

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160149 - 160149

Опубликована: Фев. 1, 2025

Язык: Английский

Процитировано

1
A Stress‐Buffering Hierarchically Porous Silicon/Carbon Composite for High‐Energy Lithium‐Ion Batteries DOI Open Access

Zhongling Cheng,

Huanhao Lin,

Yueming Liu

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 21, 2025

Abstract The electrochemical performance of Si anodes for lithium‐ion batteries (LIBs) is primarily influenced by the stress–strain and transport dynamics. However, traditional Si/carbon composites often fail to well balance these two factors. Herein, a hierarchically porous silicon/carbon composite (denoted as pSi@void@NMC) with high lithium storage capacity developed under guidance finite element analysis, where (pSi) nitrogen‐doped mesoporous carbon (NMC) used yolk shell, respectively. internal external cultivation design endows pSi@void@NMC fast transfer kinetics, effective stress‐buffering, low volume expansion, superior mechanical stability. Compared core–shell pSi@NMC bare pSi electrodes, resulting anode demonstrates reversible 1769.8 mAh g −1 after 300 cycles at 0.2 A exceptional cycling stability only 0.016% decay rate per cycle. In situ ex characterization results further confirm its reversibility Li + insertion/extraction during reactions benefiting from formation inorganic LiF‐rich SEI film. Moreover, also shows good potential full‐cell applications. These findings provide facile concept research strategy addressing stress fractures inadequate kinetics Si‐based materials high‐performance LIBs.

Язык: Английский

Процитировано

1
Understanding and Regulating the Mechanical Stability of Solid Electrolyte Interphase in Batteries DOI Open Access
Jialin Li, Yanan Wang,

Shu‐Yu Sun

и другие.

Advanced Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 19, 2024

Abstract The unstable interface between reactive anodes and electrolytes in batteries has been identified as a critical factor limiting the long‐cycle stability of batteries. An effective solution is to build solid electrolyte interphase (SEI) that acts passivation layer mitigate side reactions electrolytes. mechanical SEI important because with poor cannot survive volume topography fluctuation anode upon cycling. stress built‐up would cause failure SEI, resulting exposure fresh surface electrolyte, consuming limited active materials electrolytes, inducing rapid battery decay. Therefore, understanding regulating imperative for improving cycle life. In this review, properties are discussed. Then, advanced characterization tools measure introduced. Additionally, recent progress on presented terms situ ex modifications SEI. Finally, an insightful outlook provided further understand regulate performance.

Язык: Английский

Процитировано

5
Designing Copolymeric SEI Layer Based on Click Reaction toward Ultralow N/P Ratio and Long Cycle Life Zinc Ion Batteries DOI Open Access
Baohua Liu, Xue Ma, Qinghong Wang

и другие.

Advanced Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 20, 2024

Abstract Balancing interfacial interactions is critical to the reversibility and cycle stability of Zn ion batteries, as severe chemical corrosion undesirable hydrogen evolution reaction (HER) are inevitable for anode in aqueous electrolytes during charge/discharge process. Herein, a multi‐functional copolymeric solid/electrolyte interface (SEI) layer, self‐assembling on based click between epoxy silane thioalcohol, employed eliminate these side reactions. The dense robust SEI layer can not only physically repel water from surface effectively inhibit HER but also facilitate desolvation 2+ accelerate kinetic Additionally, it regulate flux induce preferred plating with (002) crystallographic orientation, enabling dendrite‐free deposition. As result, stable long life ≈200 h at depth discharge (DoD) 60% achieved. Zn||V 2 O 5 full cell delivers high specific capacity 165.2 mAh g −1 after 600 cycles an ultralow N/P ratio (the negative electrode positive electrode) 2.5. construction this provides new pathway development practical batteries.

Язык: Английский

Процитировано

4