(Invited) Enhanced Cycle Capacity of Lithium Ion Batteries with Nanocomposite Si Anodes Produced by Rapid Co-Condensation in Plasma Spray PVD

Fukada, Kohei; Ohta, Ryoshi; Kambara, Makoto

doi:10.1149/07703.0041ecst

Cited by 7 publications

(8 citation statements)

References 16 publications

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“…Even so, the cell with [N-1] particles shows slightly higher capacity than the [S-1] after 100 cycles. This improvement is considered to be due to the epitaxially attached NiSi 2 that helps to reinforce Si particle and retain capacity, similarly to the report in [29].…”

Section: Effect On the Battery Performancesupporting

confidence: 53%

“…For LiB application, Si nanoparticles (Si-NP) are produced by PS-PVD from metallurgical-grade Si (mg-Si) raw powders, available commonly in Si foundries, by at rates of >6 g min −1 , and the batteries using the plasma-sprayed particles as anode exhibited a clear improvement in the cycle capacity [2]. By adding Ni to Si feedstock, composite Si nanoparticles, in which Ni particles are directly attached, can be produced through co-condensation during PS-PVD, and the battery using this powder shows even higher capacities [28,29]. Furthermore, if one uses SiO as feedstock, core-shell composite Si-NP can also be produced in a single process employing spontaneous disproportionation reaction of SiO [30,31].…”

Section: Introductionmentioning

confidence: 99%

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Effect of PS-PVD production throughput on Si nanoparticles for negative electrode of lithium ion batteries

Ohta

Fukada

Tashiro

et al. 2018

J. Phys. D: Appl. Phys.

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Silicon nanoparticles (Si-NPs) have been produced by plasma spray physical vapor deposition at throughput as high as 1 kg h−1 (17 g min−1) and the effect on the battery performance is investigated. When the Si powder feed-rate is changed from 1 to 17 g min−1, although the average primary particle size increases to 50 nm, the cycle capacity of the batteries using these Si-NPs is improved slightly owing to their less agglomerated structure. In contrast, when Ni is added to Si feedstock, the cycle capacity is improved at 1 g min−1 due to modified Si-NP structure having SiNi2 interface. Whereas, the batteries with the Si-NP produced at 17 g min−1 shows significant decrease in the cycle capacity because of the excess Ni silicide formation that is resulted from the elevated co-condensation point and the increased reaction area at high throughputs despite the constant Ni concentration in the feedstock.

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Section: Effect On the Battery Performancesupporting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Effect of PS-PVD production throughput on Si nanoparticles for negative electrode of lithium ion batteries

Ohta

Fukada

Tashiro

et al. 2018

J. Phys. D: Appl. Phys.

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“…In fact, Si nanoparticles are produced by PS-PVD from metallurgical grade Si (mg-Si), and an improved cycle capacity using these nanoparticles is confirmed [34,35]. Moreover, if one uses powder mixtures of Si with the secondary element as feedstock, uniquely-structured nanoparticles have been synthesized through co-condensation of vapor mixtures [35][36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Feasibility of silicon nanoparticles produced by fast-rate plasma spray PVD for high density lithium-ion storage

Ohta¹,

Tanaka²,

Takeuchi³

et al. 2021

J. Phys. D: Appl. Phys.

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Si nanoparticles with the averaged primary particle size ranging from 20 to 175 nm have been produced by plasma spray physical vapor deposition (PS-PVD) at different powder feed rates from 0.6 to 25.4 g min−1. High-order agglomerates as large as 10 µm are found to form especially at low powder feed rate, while such large agglomerates are suppressed when the particle size becomes greater than 100 nm at high powder feed rate. The electrochemical cells using Si nanoparticles smaller than 100 nm retain relatively high capacity with reasonable cycle stability, while the capacity drops rapidly for the cells with Si greater than 100 nm due partly to an increased charge transfer resistance. Moreover, ultrasonic particle breakup reveals that absence of large agglomerates as large as 10 µm are beneficial in reducing the charge-transfer resistance and in improving the cycle stability. Although oxygen content increases with decreasing the particle size, slow oxidation upon collection of the particles after PS-PVD successfully suppresses excessive oxidation, leading to negligible influence on the initial efficiency.

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“…[27][28][29][30][31] With proper control of nucleation during co-condensation, various composite Si nanoparticles are produced and appreciable improvements in the battery cyclability are confirmed by using these materials as anode. [32][33][34] Cathode LiMn 2 O 4 nanoparticles are also produced by PFE from two low-cost elemental powders as raw materials. 35,36) When optimizing the production of LLZ nanoparticles with PFE, one needs to grasp the high temperature phase relationships in the Li-La-Zr-O system.…”

Section: Introductionmentioning

confidence: 99%

Formation of the multi-component Li–La–Zr–O nanoparticles by co-condensation during plasma flash evaporation

Ohta

Dougakiuchi

Kambara

2021

Jpn. J. Appl. Phys.

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Plasma flash evaporation (PFE) has been attempted to produce nanoparticles of the multi-component Li7La3Zr2O12 (LLZ) in the Li–La–Zr–O system where high temperature phase relationship has not yet clarified. Various phase particles are formed by PFE, including LLZ, at different collection regions, as a result of different cooling histories. Combining the numerical flow simulation and the reaction model, the primary co-condensation path to form LLZ has been identified through the optimization of the associated reaction constants with the parametric regression using nonlinear programming. The formation temperature of LLZ is also estimated to be 2200 K, and the preferable process condition to promote the LLZ single phase formation is proposed. It is also important to note that the LLZ nanoparticles with cubic structure are formed directly by PFE from raw powder mixtures.

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(Invited) Enhanced Cycle Capacity of Lithium Ion Batteries with Nanocomposite Si Anodes Produced by Rapid Co-Condensation in Plasma Spray PVD

Cited by 7 publications

References 16 publications

Effect of PS-PVD production throughput on Si nanoparticles for negative electrode of lithium ion batteries

Effect of PS-PVD production throughput on Si nanoparticles for negative electrode of lithium ion batteries

Feasibility of silicon nanoparticles produced by fast-rate plasma spray PVD for high density lithium-ion storage

Formation of the multi-component Li–La–Zr–O nanoparticles by co-condensation during plasma flash evaporation

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