Homogenizing Silicon Domains in SiOx Anode during Cycling and Enhancing Battery Performance via Magnesium Doping DOI
Jeongwoo Han, Sugeun Jo,

Ikcheon Na

et al.

ACS Applied Materials & Interfaces, Journal Year: 2021, Volume and Issue: 13(44), P. 52202 - 52214

Published: Nov. 2, 2021

SiOx (x ≈ 1) is one of the most promising anode materials for application in secondary lithium-ion batteries because its high theoretical capacity. Despite this merit, has a poor initial Coulombic efficiency, which impedes widespread use. To overcome limitation, work, we successfully demonstrate novel synthesis Mg-doped via mass-producible physical vapor deposition method. The solid-state reaction between Mg and produces Si electrochemically inert magnesium silicate, thus increasing efficiency. doping concentration determines phase silicate domains, size heterogeneity these two domains. Detailed electron microscopy synchrotron-based analysis revealed that nanoscale homogeneity silicates driven by cycling significantly affected lifetime. We found 8 wt % optimized enhanced cyclability MgSiO3, dominant composition, can be homogeneously mixed with silicon clusters, preventing their aggregation during suppressing void formation.

Language: Английский

SiOx Based Anodes for Advanced Li‐Ion Batteries: Recent Progress and Perspectives DOI

Guijuan Xie,

Xu Tan,

Zezhong Shi

et al.

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

Published: Sept. 26, 2024

Abstract SiO x with high theoretical capacity is regarded as a promising high‐performance anode material for lithium‐ion batteries. The main problem the dramatic volume expansion after lithiation and inherent poor conductivity. Tackling these problems, extensive strategies are proposed ‐based materials in order to pursue initial Coulombic efficiency, reversible capacity, long cycle stability. In this review, lithium storage mechanism, merits, disadvantages of will be introduced detail. Significant progress about recent years their detailed summarized. Finally, challenges potential solutions development application proposed. This review aims offer reference research associated good guide further improvements materials.

Language: Английский

Citations

9
Regulating Grafting Density to Realize High‐Areal‐Capacity Silicon Submicroparticle Anodes Under Ultralow Binder Content DOI
Zeheng Li,

Juncheng Qiu,

Weiting Tang

et al.

Small, Journal Year: 2024, Volume and Issue: 20(27)

Published: Feb. 2, 2024

Abstract Grafted biopolymer binders are demonstrated to improve the processability and cycling stability of silicon (Si) nanoparticle anodes. However, there is little systematical exploration regarding relationship between grafting density performance grafted binder for Si anodes, especially when particles exceed critical breaking size. Herein, a series guar gum polyacrylamide (GP) with different densities designed prepared determine optimal maximizing electrochemical submicroparticle (SiSMP) Among various GP binders, GP5 recommended demonstrates strongest adhesion strength, best mechanical properties, highest intrinsic ionic conductivity. These characteristics enable SiSMP electrodes sustain electrode integrity accelerate lithium‐ion transport kinetics during cycling, resulting in high capacity stable cyclability. The superior role enabling robust structure interface revealed through PeakForce atomic force microscopy situ differential mass spectrometry. Furthermore, cyclabilities high‐loading SiSMP@GP5 ultralow content (1 wt%) at areal as well good cyclability Ah‐level LiNi 0.8 Co 0.1 Mn O 2 /SiSMP@GP5 pouch cell strongly confirms practical viability binder.

Language: Английский

Citations

8
Investigating the failure mechanism of solid electrolyte interphase in silicon particles from an electrochemical-mechanical coupling perspective DOI Creative Commons
Junjie Ding, Xueyan Li,

Lili Gong

et al.

Advanced Powder Materials, Journal Year: 2024, Volume and Issue: 3(4), P. 100200 - 100200

Published: March 26, 2024

Silicon is considered one of the most promising anode materials owing to its high theoretical energy density, however, volume expansion/contraction during electrochemical lithiation/delithiation cycles leads instability solid electrolyte interphase (SEI), which ultimately results in capacity degradation. Herein, local stress and deformation evolution status an SEI layer on particle are investigated through a quantitative electrochemical-mechanical model. The impacts structural uniformity, mechanical strength, operating conditions stability detail. simulation demonstrate that when silicon radius decreases from 800 nm 600 400 nm, failure time increases 129% 165%, respectively, original time; When defect depth ratio reduced 0.6 0.4 0.2, 174% 237%, respectively; For discharge rate, extended 134% 239% at 0.2 C 0.3 C, compared with 0.1 C. This work provides insight into rational design stable layers sheds light possible methods for constructing silicon-based lithium-ion batteries longer cycling lives.

Language: Английский

Citations

8
Dual‐Design of Nanoporous to Compact Interface via Atomic/Molecular Layer Deposition Enabling a Long‐Life Silicon Anode DOI

Jia‐Bin Fang,

Yanqiang Cao, Shaozhong Chang

et al.

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 32(7)

Published: Nov. 5, 2021

Abstract The rapid and reversible lithiation/delithiation of silicon materials remains a challenging yet marvelous goal. Herein, harnessing the “nanoporous to compact” gradient design, dual‐film consisting flexible porous zincone rigid compact TiO 2 (zincone/TiO ) is controllably deposited onto electrode using molecular layer deposition atomic techniques. This can tailor stress ionic diffusion kinetics for anodes. That is, elastic acts as buffer dissipate inner through deformation pores, while (≈5 nm) provides particles satisfying mechanical strength protects from engulfing by solid electrolyte interphase. density functional theory galvanostatic intermittent titration technique results indicate fast Li + in Si@zincone/TiO electrode, resulting high initial Coulombic efficiency 81.9% an advantageous rate capability 1224 mAh g −1 at 4 A . More importantly, low capacity‐fading only 0.051% per cycle be achieved (discharge capacity 753 after 1000 cycles). Additionally, fractal verifies undergoes gentle evolutions during cycling with box dimension ( D B 1.73.

Language: Английский

Citations

53
Homogenizing Silicon Domains in SiOx Anode during Cycling and Enhancing Battery Performance via Magnesium Doping DOI
Jeongwoo Han, Sugeun Jo,

Ikcheon Na

et al.

ACS Applied Materials & Interfaces, Journal Year: 2021, Volume and Issue: 13(44), P. 52202 - 52214

Published: Nov. 2, 2021

SiOx (x ≈ 1) is one of the most promising anode materials for application in secondary lithium-ion batteries because its high theoretical capacity. Despite this merit, has a poor initial Coulombic efficiency, which impedes widespread use. To overcome limitation, work, we successfully demonstrate novel synthesis Mg-doped via mass-producible physical vapor deposition method. The solid-state reaction between Mg and produces Si electrochemically inert magnesium silicate, thus increasing efficiency. doping concentration determines phase silicate domains, size heterogeneity these two domains. Detailed electron microscopy synchrotron-based analysis revealed that nanoscale homogeneity silicates driven by cycling significantly affected lifetime. We found 8 wt % optimized enhanced cyclability MgSiO3, dominant composition, can be homogeneously mixed with silicon clusters, preventing their aggregation during suppressing void formation.

Language: Английский

Citations

45