Interfacial‐Catalysis‐Enabled Layered and Inorganic‐Rich SEI on Hard Carbon Anodes in Ester Electrolytes for Sodium‐Ion Batteries

Advanced Materials, Год журнала: 2023, Номер 35(29)

Опубликована: Апрель 5, 2023

Abstract Constructing a homogenous and inorganic‐rich solid electrolyte interface (SEI) can efficiently improve the overall sodium‐storage performance of hard carbon (HC) anodes. However, thick heterogenous SEI derived from conventional ester electrolytes fails to meet above requirements. Herein, an innovative interfacial catalysis mechanism is proposed design favorable in by reconstructing surface functionality HC, which abundant CO (carbonyl) bonds are accurately homogenously implanted. The act as active centers that controllably catalyze preferential reduction salts directionally guide growth form homogenous, layered, SEI. Therefore, excessive solvent decomposition suppressed, Na + transfer structural stability on HC anodes greatly promoted, contributing comprehensive enhancement performance. optimal exhibit outstanding reversible capacity (379.6 mAh g −1 ), ultrahigh initial Coulombic efficiency (93.2%), largely improved rate capability, extremely stable cycling with decay 0.0018% for 10 000 cycles at 5 A . This work provides novel insights into smart regulation chemistry realize high‐performance sodium storage.

Язык: Английский

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In situ formed uniform and elastic SEI for high-performance batteries

Energy & Environmental Science, Год журнала: 2023, Номер 16(3), С. 1166 - 1175

Опубликована: Янв. 1, 2023

A uniform and elastic SEI was constructed by in situ electro-polymerization of functionalized ionic liquid electrolyte to passivate the electrode surface, thus making potassium or lithium based batteries exhibit excellent electrochemical performance.

Язык: Английский

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Revival of Microparticular Silicon for Superior Lithium Storage

Advanced Energy Materials, Год журнала: 2023, Номер 13(24)

Опубликована: Май 5, 2023

Abstract The development of high‐performance electrode materials is a long running theme in the field energy storage. Silicon undoubtedly among most promising next‐generation anode material for lithium batteries. Of particular note, use nano‐Si, as milestone advance, has opened door commercialization silicon, but still hindered by issues related to cost, side reactions, and volumetric performance. Micro‐Si, competed unsuccessfully with nano‐Si ago, now returned its natural strengths low high tap density, interfacial reaction, regaining attention both from academia industry. In this review, promises micro‐Si anodes are first clarified then their pain points presented followed summary potential remedies such carbon encapsulation, binder design, electrolyte modifications improved mechanical electrochemical stability. Finally, toward practical future batteries, major prospective directions discussed. Carbon coatings desired properties combined stable solid highlighted along significance exploit anodes.

Язык: Английский

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Carbon Nanotube‐Reinforced Dual Carbon Stress‐Buffering for Highly Stable Silicon Anode Material in Lithium‐Ion Battery

Small, Год журнала: 2023, Номер 19(30)

Опубликована: Апрель 8, 2023

Silicon (Si) anode suffers from huge volume expansion which causes poor structural stability in terms of electrode material, solid electrolyte interface, and electrode, limiting its practical application high-energy-density lithium-ion batteries. Rationally designing architectures to optimize the stress distribution Si/carbon (Si/C) composites has been proven be effective enhancing their cycling stability, but this remains a big challenge. Here, metal-organic frameworks (ZIF-67)-derived carbon nanotube-reinforced framework is employed as an outer protective layer encapsulate inner carbon-coated Si nanoparticles (Si@C@CNTs), features dual stress-buffering enhance Si/C composite prolong lifetime. Finite element simulation proves advantage through significantly relieving concentration when lithiation. The also accelerates charge transfer efficiency during charging/discharging by improvement diffusion electron transport. As result, Si@C@CNTs exhibits excellent long-term lifetime good rate capability, showing specific capacity 680 mAh g-1 even at high 1 A after 1000 cycles. This work provides insight into design robust for optimization.

Язык: Английский

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Si-Based Anodes: Advances and Challenges in Li-Ion Batteries for Enhanced Stability

Electrochemical Energy Reviews, Год журнала: 2024, Номер 7(1)

Опубликована: Март 10, 2024

Язык: Английский

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Physicochemical Dual Cross‐Linking Conductive Polymeric Networks Combining High Strength and High Toughness Enable Stable Operation of Silicon Microparticle Anodes

Advanced Materials, Год журнала: 2023, Номер 35(29)

Опубликована: Апрель 8, 2023

The poor interfacial stability and insufficient cycling performance caused by undesirable stress hinder the commercial application of silicon microparticles (µSi) as next-generation anode materials for high-energy-density lithium-ion batteries. Herein, a conceptionally novel physicochemical dual cross-linking conductive polymeric network is designed combining high strength toughness coupling stiffness poly(acrylic acid) softness carboxyl nitrile rubber, which includes multiple H-bonds, introducing highly branched tannic acid physical cross-linker. Such design enables effective dissipation folded molecular chains slipping sequential cleavage thus stabilizing electrode interface enhancing cycle stability. As expected, resultant (µSi/PTBR) delivers an unprecedented capacity retention ≈97% from 2027.9 mAh g-1 at 19th to 1968.0 200th 2 A . Meanwhile, this unique strategy also suitable SiOx anodes with much lower loss ≈0.012% per over 1000 cycles 1.5 Atomic force microscopy analysis finite element simulations reveal excellent stress-distribution ability network. This work provides efficient energy-dissipation toward practical high-capacity energy-dense

Язык: Английский

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Challenges and opportunities towards silicon-based all-solid-state batteries

Energy storage materials, Год журнала: 2023, Номер 61, С. 102875 - 102875

Опубликована: Июль 1, 2023

Язык: Английский

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Building better solid‐state batteries with silicon‐based anodes

Interdisciplinary materials, Год журнала: 2023, Номер 2(4), С. 635 - 663

Опубликована: Июль 1, 2023

Abstract Silicon (Si)‐based solid‐state batteries (Si‐SSBs) are attracting tremendous attention because of their high energy density and unprecedented safety, making them become promising candidates for next‐generation storage systems. Nevertheless, the commercialization Si‐SSBs is significantly impeded by enormous challenges including large volume variation, severe interfacial problems, elusive fundamental mechanisms, unsatisfied electrochemical performance. Besides, some unknown processes in Si‐based anode, electrolytes (SSEs), anode/SSE interfaces still needed to be explored, while an in‐depth understanding solid–solid chemistry insufficient Si‐SSBs. This review aims summarize current scientific technological advances insights into tackling promote deployment First, differences between various conventional liquid electrolyte‐dominated lithium‐ion (LIBs) with discussed. Subsequently, mechanical contact model, chemical reaction properties, charge transfer kinetics (mechanical–chemical kinetics) anode three different SSEs (inorganic (oxides) SSEs, organic–inorganic composite inorganic (sulfides) SSEs) systemically reviewed, respectively. Moreover, progress SSE‐based on aspects electrode constitution, three‐dimensional structured electrodes, external stack pressure highlighted, Finally, future research directions prospects development proposed.

Язык: Английский

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Strategies toward the development of high-energy-density lithium batteries

Journal of Energy Storage, Год журнала: 2024, Номер 88, С. 111666 - 111666

Опубликована: Апрель 16, 2024

Язык: Английский

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Covalent Coating of Micro‐Sized Silicon With Dynamically Bonded Graphene Layers Toward Stably Cycled Lithium Storage

Advanced Energy Materials, Год журнала: 2023, Номер 13(28)

Опубликована: Июнь 9, 2023

Abstract State‐of‐the‐art carbon coatings are sought to protect high‐capacity silicon anodes, which suffer from low conductivity, large volume change and fast degradation. However, this approach falls short when handling physical–electrical disconnections between shells microparticulate (SiMP) with drastic size variations. Here, a strategy of covalent coating is developed establish robust encapsulation structure. The obtained SiC bonds enable an effectively dynamic connection the electrochemically deforming SiMP sliding graphene layers, preventing evolution gaps shell maintaining persistent electrical connections as well mechanical toughness. As result high structure reversibility, cycling stability thick anodes greatly improved, up areal capacity 5.6 mAh cm −2 volumetric 2564 −3 . This interface bonding effect demonstrates great potential for suppressing deformation involved degradation materials through strategies.

Язык: Английский

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