Consecutive Covalent Bonds Reconstruct Robust Dual-Interfaces by Carbonized Binder to Enable Conductive-Additive-Free Durable Silicon Anode

Nano Energy, Journal Year: 2024, Volume and Issue: 130, P. 110108 - 110108

Published: Aug. 15, 2024

Language: Английский

---

Recent Status, Key Strategies, and Challenging Prospects for Fast Charging Silicon-Based Anodes for Lithium-Ion Batteries

Carbon, Journal Year: 2024, Volume and Issue: 230, P. 119615 - 119615

Published: Sept. 8, 2024

Language: Английский

---

Hierarchical Yolk‐Shell Silicon/Carbon Anode Materials Enhanced by Vertical Graphene Sheets for Commercial Lithium‐Ion Battery Applications

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

Published: Sept. 14, 2024

Abstract Yolk‐shell structured silicon/carbon (YS‐Si/C) anode materials show promise for commercial lithium‐ion batteries (LIBs) because of their high specific capacity and excellent cycling life. However, commercialization has not been realized despite nearly a decade research, primarily due to poor mechanical strength, limited rate capability, low energy density. This study reports hierarchical YS‐Si/C material synthesized via thermal chemical vapor deposition the growth vertical graphene sheets (VGSs), polymer self‐assembly, one‐step carbonization, which establishes connections between Si core carbon shell through VGSs, enhancing electrochemical characteristics material. The unique outperforms VGSs‐free composites, presents 1683.2 mAh g −1 at 0.1 C, performance 552.2 10 superior retention 80.1% after 1000 cycles. When matched with LiNi 0.8 Co Mn O 2 cathodes, ampere‐hour‐level pouch cell delivers gravimetric volumetric densities 429.2 Wh kg 1083 L , respectively. Finite element analysis shows that VGSs reduce stress concentration on shell, helping hollow withstand industrial electrode calendaring. work demonstrates potential application in practical LIBs.

Language: Английский

---

Nano-Silicon Encased in a S, N Co-doped Carbon Shells Anode Delivers High Lithium-Ion Storage Performance

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(33), P. 12542 - 12552

Published: Aug. 3, 2024

Nano-silicon (Si) integrating carbonous material has been recognized as a viable approach for restraining the intrinsic serious volume change and enhancing poor conductivity, finally resulting in improved electrochemical properties, including capacity, rate performance, cycling life-span. Nevertheless, it remains huge challenge via straightforward strategy to obtain homogeneous Si@C composite with an exceptional Li+ storage performance. Herein, novel Si S, N co-doped carbon shell graphite (Si@C/SN@Graphite) have prepared through combining situ coating liquid-phase ball milling method, which thiourea was used dopant, poly(ethylene glycols) were precursor, utilized matrix. The combined effect of S co-doping layer sheet is sufficient efficiently restrain expansion, enhance electronic provide numerous rooms anode. Furthermore, theoretical simulation testing carried out further demonstrate superiority layer. As result, as-prepared Si@C/SN anode delivers notable initial Coulombic efficiency (ICE) 91%, high reversible capacity 1213 mAh/g at 2 A/g within 0–1.0 V coupled 92.8% retention 400 cycles. Moreover, Si@C/SN@Graphite exhibits outstanding capacities 690 379 0.05 1 0–2 along 90% 500 Additionally, full cell assembled by using LiFePO4 cathode presents 176.5 137.9 0.2 3 C, respectively, considerable ICE 92% well 200 This work provides facile cost-effective obtaining composites Li-ion capabilities LIBs.

Language: Английский

---

The Synergistic Effect of Aramid Nanofibers and Carbon Nanotubes on Micro‐Silicon Anodes for Improved Stability and Conductivity

Small, Journal Year: 2024, Volume and Issue: unknown

Published: July 28, 2024

Abstract Despite the continuous development of energy storage, challenges faced by micro‐silicon anode pulverization have yet to be effectively addressed. In this work, aramid nanofibers (ANFs) are in situ protonated on surface silicon micro‐particles (SMPs), and also act as surfactants bundle carbon nanotubes (CNTs) form ANF/CNT networks SMPs (ANF/CNT/SMPs) at same time. The results demonstrate that dual‐coating not only inhibits expansion enhances structural stability but improves conductivity, thereby promoting cycling anodes. ANF/CNT/SMP shows 454 mAh g −1 0.2 A after 200 cycles. thickness electrode can reduced 51.5% 100 cycles compared with SMP electrode. findings provide a novel approach for mitigating anodes through combined coating ANFs CNTs.

Language: Английский

---

Preparation of WSi@SiOx/Ti3C2 from photovoltaic silicon waste as high-performance anode materials for lithium-ion batteries

iScience, Journal Year: 2024, Volume and Issue: 27(9), P. 110714 - 110714

Published: Aug. 13, 2024

Silicon anodes hold promise for future lithium-ion batteries (LIBs) due to their high capacity, but they face challenges such as severe volume expansion and low electrical conductivity. In this study, we present a straightforward scalable electrostatic self-assembly method fabricate WSi@SiO

Language: Английский

---

Silicon-based nanosphere anodes for lithium-ion batteries: Features, progress, effectiveness, challenges, and prospects

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 99, P. 113371 - 113371

Published: Aug. 17, 2024

Language: Английский

---

Synthesis Methods of Si/C Composite Materials for Lithium-Ion Batteries

Batteries, Journal Year: 2024, Volume and Issue: 10(11), P. 381 - 381

Published: Oct. 28, 2024

Silicon anodes present a high theoretical capacity of 4200 mAh/g, positioning them as strong contenders for improving the performance lithium-ion batteries. Despite their potential, practical application Si is constrained by significant volumetric expansion (up to 400%) during lithiation/delithiation, which leads mechanical degradation and loss electrical contact. This issue contributes poor cycling stability hinders commercial viability, various silicon–carbon composite fabrication methods have been explored mitigate these challenges. review covers key techniques, including ball milling, spray drying, pyrolysis, chemical vapor deposition (CVD), mechanofusion. Each method has unique benefits; milling drying are effective creating homogeneous composites, whereas pyrolysis CVD offer high-quality coatings that enhance silicon anodes. Mechanofusion highlighted its ability integrate with carbon materials, showing potential further optimization. In light advancements, future research should focus on refining techniques Si-based The optimization compounding process addressing volume change low conductivity, while simultaneously cost-related concerns.

Language: Английский

---

Stacked hollow carbon nanospheres enhance the performance of micro silicon negative electrode in lithium-ion batteries

Materials Today Communications, Journal Year: 2025, Volume and Issue: unknown, P. 112530 - 112530

Published: April 1, 2025

Language: Английский

---

Enhancement Mechanism of Photo‐Induced Artificial Boundary on Ultrastable Hybrid Solid‐electrolyte Interphase of Si Anodes

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 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.

Language: Английский

---