Nanocrystalline silicon embedded in an alloy matrix as an anode material for high energy density lithium-ion batteries

Kim, Sang-Hyung; Lee, Dong Hoon; Park, Cheol-Ho; Kim, Dong-Won

doi:10.1016/j.jpowsour.2018.05.087

Cited by 36 publications

(10 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Si–Ti–Fe–Al alloy ribbons were produced by the graphite nozzle single roll method under an inert environment for preventing the oxidation of alloys. The resulting Si–Ti–Fe–Al alloy nanocomposite ribbons were mechanically crushed into powders …”

Section: Methodsmentioning

confidence: 99%

Real‐Time Dilation Observation of Si‐Alloy Electrode Using Thermally Treated Poly (Amide‐Imide) as a Binder for Lithium Ion Battery

Park

Lee

Chung

et al. 2019

Bulletin Korean Chem Soc

Self Cite

View full text Add to dashboard Cite

Real time dilation behaviors of a Si-Ti-Fe-Al alloy electrode adopting a poly (amide-imide) binder were investigated to understand the effects of thermal treatment temperature for PAI binder on the electrochemical performance of the Si-alloy electrode using an in-situ electrochemical dilatometer. In situ measurement of the electrode thickness showed that the changes in the volume of the Si electrode was suppressed by heat treatment greater than 300 C, which well agreed with the improved cycle performance of the Sialloy electrode thermally treated at the same temperature. Differential dilation plots of the Si-alloy electrodes were found to reveal more detailed changes in the volume of the Si-alloy electrode, thus showing that the enhanced mechanical strength of thermally treated PAI effectively could control the expansion and contraction of the Si-alloy electrode and ensuring a more stable cycle performance of the Si-alloy electrode.

show abstract

Section: Methodsmentioning

confidence: 99%

Real‐Time Dilation Observation of Si‐Alloy Electrode Using Thermally Treated Poly (Amide‐Imide) as a Binder for Lithium Ion Battery

Park

Lee

Chung

et al. 2019

Bulletin Korean Chem Soc

Self Cite

View full text Add to dashboard Cite

show abstract

“…Due to the growing requirements for Li-ion cells, extensive research is carried out on the development of new electrode materials that will ensure higher energy density, high efficiency and a longer cycle life [ 9 ]. One of them is carbon-based materials, such as carbon nanotubes [ 10 , 11 ] or graphene [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Functionalization Mechanism of Reduced Graphene Oxide Flakes with BF3·THF and Its Influence on Interaction with Li+ Ions in Lithium-Ion Batteries

et al. 2021

View full text Add to dashboard Cite

Doping of graphene and a controlled induction of disturbances in the graphene lattice allows the production of numerous active sites for lithium ions on the surface and edges of graphene nanolayers and improvement of the functionality of the material in lithium-ion batteries (LIBs). This work presents the process of introducing boron and fluorine atoms into the structure of the reduced graphene during hydrothermal reaction with boron fluoride tetrahydrofuran (BF3·THF). The described process is a simple, one-step synthesis with little to no side products. The synthesized materials showed an irregular, porous structure, with an average pore size of 3.44–3.61 nm (total pore volume (BJH)) and a multi-layer structure and a developed specific surface area at the level of 586–660 m2/g (analysis of specific surface Area (BET)). On the external surfaces, the occurrence of irregular particles with a size of 0.5 to 10 µm was observed, most probably the effect of doping the graphene structure and the formation of sp3 hybridization defects. The obtained materials show the ability to store electric charge due to the development of the specific surface area. Based on cyclic voltammetry, the tested material showed a capacity of 450–550 mAh/g (charged up to 2.5 V).

show abstract

“…Meanwhile, alloying with inactive elements, such as Fe, Ni, Co, and Ti (i.e., transition metal, TM) can reduce the overall alloy volume expansion, resulting in improved cycling performance. The inactive matrix phase buffers the volume expansion of the active Si phase and provides a continuous conduction pathway for electrons [19]. Fleischauer et al proposed that the specific capacity of a particular Si-TM alloy can be predicted from the effective heat of formation [20].…”

Section: Introductionmentioning

confidence: 99%

Optimal Synthesis and Application of a Si–Ti–Al Ternary Alloy as an Anode Material for Lithium-Ion Batteries

Lee

Kim

Kim³

et al. 2021

Materials

View full text Add to dashboard Cite

The development of novel anode materials for high energy density is required. Alloying Si with other metals is a promising approach to utilize the high capacity of Si. In this work, we optimized the composition of a Si–Ti–Al ternary alloy to achieve excellent electrochemical performance in terms of capacity, cyclability, and rate capability. The detailed internal structures of the alloys were characterized through their atomic compositions and diffraction patterns. The lithiation process of the alloy was monitored using real-time scanning electron microscopy, revealing that the mechanical stability of the optimized alloy was strongly enhanced compared to that of the pure silicon material.

show abstract

Nanocrystalline silicon embedded in an alloy matrix as an anode material for high energy density lithium-ion batteries

Cited by 36 publications

References 35 publications

Real‐Time Dilation Observation of Si‐Alloy Electrode Using Thermally Treated Poly (Amide‐Imide) as a Binder for Lithium Ion Battery

Real‐Time Dilation Observation of Si‐Alloy Electrode Using Thermally Treated Poly (Amide‐Imide) as a Binder for Lithium Ion Battery

Functionalization Mechanism of Reduced Graphene Oxide Flakes with BF3·THF and Its Influence on Interaction with Li+ Ions in Lithium-Ion Batteries

Optimal Synthesis and Application of a Si–Ti–Al Ternary Alloy as an Anode Material for Lithium-Ion Batteries

Contact Info

Product

Resources

About