東京大学・大学院工学系研究科（工学部）・准教授

科学研究費助成事業　　研究成果報告書

様　式　Ｃ－１９、Ｆ－１９－１、Ｚ－１９ （共通）

機関番号：

研究種目：

課題番号：

研究課題名（和文）

研究代表者

研究課題名（英文）

交付決定額（研究期間全体）：（直接経費）

１２６０１

基盤研究(B)（一般）

2017～2015

次世代Liイオン電池負極用高次複合ナノ粒子創製

Development of composite nanoparticles for negative electrode of next generation lithium ion batteries

８０３５９６６１研究者番号：

神原　淳（Kambara, Makoto）

研究期間：

１５Ｈ０４１５２

平成 年 月 日現在３０ ６ ５

円 14,450,000

研究成果の概要（和文）：本研究課題は，プラズマスプレー物理蒸着（PS-PVD）によるナノ粒子の特徴的な構造を積極的に利用した独自の複合電極を開発し，リチウムイオン電池の高容量化と充放電サイクル安定性の向上両立を目指した。主要な成果は，Sn担持Siナノ粒子を利用した活物質ネットワークを有する負極によって飛躍的なサイクル特性の向上を見出すと共に，SiO負極の高効率還元によって高容量化と高サイクル性を実現し，ナノ粒子化に伴う不均化反応の高速化を初めて明らかにした。また，Siナノ粒子の1kg/hrの高スループット製造を実証し高速生成時の構造変調機構を明らかにして目的構造と高速製造の両立のための要件を明示した。

研究成果の概要（英文）：This project aims at the simultaneous attainment of increased capacity and enhanced cyclability of lithium-ion batteries by using the best of the characteristic composite nanoparticles designed by plasma spray PVD. As the major achievements, we have demonstrated significantly high capacity maintained after longer cycles with the active-material-network in the anode by using the best of the characteristic structure of Si:Sn nanoparticle produced by PS-PVD. The higher cycle capacities with SiO nanoparticles is also attained by the effective reduction during PS-PVD of SiO, along with the new finding that the disproportionation reaction can be accelerated in nanosized SiO. Furthermore, we have also achieved Si nanoparticle production as high as 1 kg/hr. The effect of throughput on the co-condensation process in PS-PVD is clarified and the optimal conditions to produce the optimal composite particles at greater throughputs are proposed.

研究分野： プラズマ材料工学

キーワード： リチウムイオン電池　ナノ粒子　プラズマスプレー

２版

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S 5 (1) R.Ohta, K. Fukada, T. Tashiro, M.

Dougakiuchi, M. Kambara, Effect of PS-PVD production throughput on Si nanoparticles for negative electrode of lithium ion batteries, J. Phys. D: Appl. Phys.,51 (2018)105501. Doi:10.1088/1361-6463/aaab37

(2) T. Tashiro, M. Dogakiuchi, M. Kambara, Instantaneous formation of SiOx nanocomposite for high capacity lithium ion batteries by enhanced disproportionation reaction during plasma spray physical vapor deposition, Sci. Technol. Adv. Mater., 17 (2016) 744-752. Doi:10.1080/14686996.2016.1240574

(3) K. Fukada, R. Ohta, M. Kambara, Enhanced cycle capacity of lithium ion batteries with nanocomposite Si anodes produced by rapid co-condensation in plasma spray PVD, ECS

Trans., 77 (2017) 41-47. Doi:10.1149/07703.0041ecst

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R. Ohta, Y. Ohta, T. Tashiro, M. Kambara, Production of composite Si nanoparticles by plasma spray PVD and CH4 annealing for negative electrode of lithium ion batteries, 68th GEC, 2015/10/12-16.

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Nanocomposite Si/SiOx particle formaition through enhanced disproportionation reaction during plasma spray PVD, MRS-J, 2015/12/8-10.

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153 1292016 12 9 M. Kambara, Enhanced cycle capacity of lithium ion batteries with Ni-epitaxially-attached Si nanoparticles as anode produced by plasma spray physical vapor deposition, 26th MRS-J, 2016/12/19-22 S. Hamazaki et al., (6 authors, 7th), Production of SiO nanoparticles with reduced oxygen content by pulse-modulated plasma spray PVD for an increase in capacity of LiBs, (poster) 26th MRS-J, 2016/19-22 PVD s Li ˚ Si

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LiB 652018 M. Kambara, T. Tohara, R. Ohta, Enhancement in capacity of lithium ion batteries with composite Si:Sn nanoparticulate anode produced through co-condensation in PS-PVD, MRS-J, 2017

Plasma Conference 2018 2017 M. Kambara, T. Tohara, R. Ohta, Enhanced cyclability with plasma sprayed Si-M canocomposite anodes for lithium ion batteries, AEPSE2017, 2017.

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) M. Kambara, K. Fukada, R. Ohta, T. Tohara, N. Gerile, Enhanced cycle capacity of lithium ion batteries with nanocomposite Si anodes produved by rapid co-condensation in plasma spray PVD, ECS 2017, 2017. ( M. Kambara, Nanocomposite Si particle production by plasma spray PVD for next generation high energy density lithium ion batteries, 22nd Korea-Japan Workshop, 2017. M. Kambara, R. Yamada, S. Wu, Nanocluster assisted mesoplasma epitaxial bridging, ICMCTF 2017, 2017.

S 1 M. Kambara, H. Hideshima, M. Kaga, T.

Yoshida, Plasma spray PVD: High throughput production of nanoparticles, Encyclopedia Plasma Technol., Taylor & Francis, (2017) 1176-1190.

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