Si-TiN alloy Li-ion battery negative electrode materials made by N2 gas milling

Wang, Y.; Cao, Simeng; Liu, Hui; Zhu, Min; Obrovac, M. N.

doi:10.1557/mrc.2018.178

Cited by 7 publications

(9 citation statements)

References 18 publications

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“…NM alloy formation mainly depends on the presence of additional elements and the atmosphere during the material preparation process. For example, nanocomposite Si/(NiTi) anodes could successfully be prepared by a consecutive two-stage high-energy mechanical ball milling process [119]. The double ball milling process results in a large number of defects and high porosity in the resultant material, which is beneficial for the permeation of electrolytes.…”

Section: Other Systemsmentioning

confidence: 99%

“…The double ball milling process results in a large number of defects and high porosity in the resultant material, which is beneficial for the permeation of electrolytes. NiTi alloys can well combine the advantages of Ti and Ni and show good electrical conductivity and mechanical strength [38,119]. The resultant material is composed of extremely fine NPs with Si active materials evenly dispersed throughout the inactive NiTi matrix, which shortens the transport path of electrons and Li + and enhances the rate capability of the anode.…”

Section: Other Systemsmentioning

confidence: 99%

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Review of silicon-based alloys for lithium-ion battery anodes

Feng

Peng

Wang

et al. 2021

Int J Miner Metall Mater

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Silicon (Si) is widely considered to be the most attractive candidate anode material for use in next-generation high-energy-density lithium (Li)-ion batteries (LIBs) because it has a high theoretical gravimetric Li storage capacity, relatively low lithiation voltage, and abundant resources. Consequently, massive efforts have been exerted to improve its electrochemical performance. While some progress in this field has been achieved, a number of severe challenges, such as the element's large volume change during cycling, low intrinsic electronic conductivity, and poor rate capacity, have yet to be solved. Methods to solve these problems have been attempted via the development of nanosized Si materials. Unfortunately, reviews summarizing the work on Si-based alloys are scarce. Herein, the recent progress related to Si-based alloy anode materials is reviewed. The problems associated with Si anodes and the corresponding strategies used to address these problems are first described. Then, the available Si-based alloys are divided into Si/Li-active and inactive systems, and the characteristics of these systems are discussed. Other special systems are also introduced. Finally, perspectives and future outlooks are provided to enable the wider application of Sialloy anodes to commercial LIBs.

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Section: Other Systemsmentioning

confidence: 99%

Section: Other Systemsmentioning

confidence: 99%

Review of silicon-based alloys for lithium-ion battery anodes

Feng

Peng

Wang

et al. 2021

Int J Miner Metall Mater

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“…Since high Si content alloys are brittle, ball milling typically results in the formation of submicron Si-alloy particles with high surface area. 6,7 It is well known that high surface area is detrimental for anode materials because higher surface areas result in greater electrolyte reactivity. This leads to poor cell performance due to the consumption of Li ions in electrolyte decomposition reactions and high polarization due to electrolyte depletion and excessive solid electrolyte interphase (SEI) formation.…”

mentioning

confidence: 99%

“…The Si-TiN alloy composition was identified previously as being promising for Li-ion batteries because of its good cycling characteristics and high thermal stability (making it amenable towards carbon coating by chemical vapor deposition). 5,6,14 Si-TiN alloys may be formed by reactive gas ball milling of Si and Ti powders in N 2 (g). Under these conditions, Si-TiN alloys are formed according to 2 consecutive reactions: 5,6,14…”

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confidence: 99%

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Preparation of Low Surface Area Si-Alloy Anodes for Li-Ion Cells by Ball Milling

Cao

Tahmasebi

Gracious

et al. 2022

J. Electrochem. Soc.

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A new and simple 2-step milling technique is utilized to produce Si–Ti–N alloys with significantly reduced surface area compared to conventional ball milling, while still attaining a full amorphous active Si phase. Surface area reductions of up to 100% were obtained by this method. Surprisingly, this did not result in significant differences in cycling stability compared to conventionally ball milled high surface area alloy materials. This is likely because cycling caused severe fracturing of the alloy surfaces, resulting in a high surface area, regardless of the initial surface area of the alloy. This suggests that, unlike other anode materials such as graphite, reducing the initial surface area of Si alloys does not translate into reduced electrolyte reactivity.

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