Assembly: A Key Enabler for the Construction of Superior Silicon‐Based Anodes

Advanced Science, Год журнала: 2022, Номер 9(30)

Опубликована: Авг. 31, 2022

Silicon (Si) is regarded as the most promising anode material for high-energy lithium-ion batteries (LIBs) due to its high theoretical capacity, and low working potential. However, large volume variation during continuous lithiation/delithiation processes easily leads structural damage serious side reactions. To overcome resultant rapid specific capacity decay, nanocrystallization compound strategies are proposed construct hierarchically assembled structures with different morphologies functions, which develop novel energy storage devices at nano/micro scale. The introduction of assembly in preparation process silicon-based materials can integrate advantages both nanoscale microstructures, significantly enhance comprehensive performance prepared assemblies. Unfortunately, summary understanding still lacking. In this review, deepened terms driving forces, methods, influencing factors advantages. recent research progress anodes mechanism functional reviewed from aspects spatial confinement, layered construction, fasciculate structure assembly, superparticles, interconnected strategies. Various feasible improvement pointed out. Finally, challenges integrated summarized.

Язык: Английский

---

Recent progress and challenges in silicon-based anode materials for lithium-ion batteries

Industrial Chemistry and Materials, Год журнала: 2023, Номер 2(2), С. 226 - 269

Опубликована: Дек. 28, 2023

This review highlights the importance of silicon-based anodes in lithium-ion batteries, emphasizing their improved performance through modifications involving binders, coatings, composites, and electrolytes.

Язык: Английский

---

Emerging Multiscale Porous Anodes toward Fast Charging Lithium-Ion Batteries

ACS Nano, Год журнала: 2023, Номер 17(21), С. 20850 - 20874

Опубликована: Ноя. 3, 2023

With the accelerated penetration of global electric vehicle market, demand for fast charging lithium-ion batteries (LIBs) that enable improvement user driving efficiency and experience is becoming increasingly significant. Robust ion/electron transport paths throughout electrode have played a pivotal role in progress LIBs. Yet traditional graphite anodes lack ion channels, which suffer extremely elevated overpotential at ultrafast power outputs, resulting lithium dendrite growth, capacity decay, safety issues. In recent years, emergent multiscale porous dedicated to building efficient channels on multiple scales offer opportunities anodes. This review survey covers advances emerging It starts by clarifying how pore parameters such as porosity, tortuosity, gradient affect ability from an electrochemical kinetic perspective. We then present overview efforts implement both material levels diverse types anode materials. Moreover, we critically evaluate essential merits limitations several quintessential practical viewpoint. Finally, highlight challenges future prospects design associated with materials electrodes well crucial issues faced battery management level.

Язык: Английский

---

Advances in Carbon Nanotubes and Carbon Coatings as Conductive Networks in Silicon‐based Anodes

Advanced Functional Materials, Год журнала: 2024, Номер 34(48)

Опубликована: Июль 25, 2024

Abstract Silicon‐based anode has high theoretical capacity but suffers from poor electrical conductivity, large volume expansion, and unstable solid electrolyte interphase (SEI). Adding carbon nanotubes (CNTs) coatings are both very effective methods for addressing the above issues. The intrinsic sp 2 covalent structure endows CNTs with excellent mechanical strength, chemical stability, which makes them suitable various energy storage applications, such as in lithium‐ion batteries (LIBs). Apart conductive network, can serve current collectors, probes, frameworks, they have potential construction of next‐generation battery architectures. Carbon mixed ionic‐electronic conductors good stability that provide support mitigate expansion Si‐based materials. This review outlines advances networks anodes, well insights into their future development. It provides an in‐depth analysis percolation mechanism networks, highlights importance flexible long‐range decouples relationships between stress, interface electron/ion transfer.

Язык: Английский

---

Si/SiO₂@Graphene Superstructures for High‐Performance Lithium‐Ion Batteries

Advanced Functional Materials, Год журнала: 2022, Номер 33(8)

Опубликована: Дек. 12, 2022

Abstract The superstructure composed of various functional building units is promising nanostructure for lithium‐ion batteries (LIBs) anodes with extreme volume change and structure instability, such as silicon‐based materials. Here, a top‐down route to fabricate Si/SiO 2 @graphene demonstrated through reducing silicalite‐1 magnesium reduction depositing carbon layers. successful formation lies on the strong 3D network formed by bridged‐SiO matrix coated around silicon nanoparticles. Furthermore, mesoporous amorphous bridged SiO facilitates deposition graphene layers, resulting in excellent structural stability high ion/electron transport rate. optimized anode delivers an outstanding cycling life ≈1180 mAh g −1 at A over 500 cycles, rate capability ≈908 12 , great areal capacity ≈7 cm −2 0.5 mA extraordinary mechanical stability. full cell test using LiFePO 4 cathode manifests 134 after 290 loops. More notably, series technologies disclose that electrode can effectively maintain film between electrolyte LIBs. This design elucidates potential commercial application high‐performance

Язык: Английский

---

A review of existing and emerging binders for silicon anodic Li-ion batteries

Nano Research, Год журнала: 2023, Номер 16(5), С. 6736 - 6752

Опубликована: Фев. 14, 2023

Язык: Английский

---

Recent Progress on Electrolyte Boosting Initial Coulombic Efficiency in Lithium‐Ion Batteries

Advanced Functional Materials, Год журнала: 2023, Номер 34(5)

Опубликована: Июль 12, 2023

Abstract The initial Coulombic efficiency (ICE) of electrode materials is closely related to the energy density lithium‐ion batteries (LIBs). However, some promising for next generation LIBs suffer from low ICE, which inevitably hinders their practical application. Among discovered modified strategies LIBs, electrolyte optimization has attracted extensive attention due its facile operation process. Herein, role ICE in first analyzed. Subsequently, recent progress on effective boosting LIB summarized (including lithium salt, salt concentration, solvent, and additive). Finally, future research directions are proposed. This review provides valuable guidance developing advanced LIBs.

Язык: Английский

---

Rational Design of Ion‐Conductive Layer on Si Anode Enables Superior‐Stable Lithium‐Ion Batteries

Small, Год журнала: 2023, Номер 20(5)

Опубликована: Сен. 27, 2023

Abstract Silicon (Si) is considered a promising commercial material for the next‐generation of high‐energy density lithium‐ion battery (LIB) due to its high theoretical capacity. However, severe volume changes and poor conductivity hinder practical application Si anode. Herein, novel core–shell heterostructure, as core V 3 O 4 @C shell (Si@V @C), proposed by facile solvothermal reaction. Theoretical simulations have shown that in‐situ‐formed layer facilitates rapid Li + diffusion lowers energy barrier transport from carbon inner core. The 3D network structure constructed amorphous can effectively improve electronic structural stability. Benefiting rationally designed structure, optimized Si@V electrode exhibits an excellent cycling stability 1061.1 mAh g −1 at 0.5 A over 700 cycles (capacity retention 70.0%) with average Coulombic efficiency 99.3%. In addition, @C||LiFePO full cell shows superior capacity 78.7% after 130 C. This study opens way designing high‐performance silicon anode advanced LIBs.

Язык: Английский

---

Internal and External Cultivation Design of Zero‐Strain Columbite‐Structured MNb₂O₆ toward Lithium‐Ion Capacitors as Competitive Anodes

Advanced Energy Materials, Год журнала: 2023, Номер 13(38)

Опубликована: Авг. 17, 2023

Abstract Modest rate behaviors and structural collapse of battery‐type anodes limit the commercial application lithium‐ion capacitors (LICs). For this, rational design advanced with both stability high ionic/electronic conductivities becomes essential to LICs. Herein, a general avenue is developed construct series single‐crystal nano‐blocks assembled as “zero‐strain” columbite‐structured MNb 2 O 6 (M = Cd, Co, Zn, Mn, Mg, Ca) accordion frameworks toward The intrinsic Li + (de)insertion involves solid‐solution charge storage mechanism volumetric change <0.59% over (de)lithiation established systematical in(ex) situ analysis. exhibits M‐dependent electron/ion transport capabilities, along highest electronic diffusion rates smallest volume (0.32%) for CdNb . Thanks its robust structure superb originating from “internal (i.e., optimization) external design) cultivation” design, shows optimum electrochemical capacity 102.8 mAh g −1 at 10 A retention 80.3% after 20 000 cycles 5 ‐based LICs display high‐rate energy density long‐duration stability. More importantly, devised strategy provides meaningful guidance next‐generation

Язык: Английский

---

Tight Binding and Dual Encapsulation Enabled Stable Thick Silicon/Carbon Anode with Ultrahigh Volumetric Capacity for Lithium Storage

Small, Год журнала: 2023, Номер 19(48)

Опубликована: Июль 31, 2023

Silicon (Si) is regarded as one of the most promising anode materials for high-performance lithium-ion batteries (LIBs). However, how to mitigate its poor intrinsic conductivity and lithiation/delithiation-induced large volume change thus structural degradation Si electrodes without compromising their energy density critical practical application in LIBs. Herein, an integration strategy proposed preparing a compact micron-sized Si@G/CNF@NC composite with tight binding dual-encapsulated architecture that can endow it superior electrical deformation resistance, contributing excellent cycling stability good rate performance thick electrode. At ultrahigh mass loading 10.8 mg cm-2 , electrode also presents initial areal capacity 16.7 mA h (volumetric 2197.7 cm-3 ). When paired LiNi0.95 Co0.02 Mn0.03 O2 pouch-type full battery displays highly competitive gravimetric (volumetric) ≈459.1 Wh kg-1 (≈1235.4 L-1

Язык: Английский

---