Electrochemical properties of the Si thin-film anode deposited on Ti-Nb-Zr shape memory alloy in Li-ion batteries

Joo-Hyeon Bae; Oyunbayar Nyamaa; Jun-Seok Lee; Sang-du Yun; Seong-Min Woo; Jeong-Hyeon Yang; Min-Su Kim; Jung-Pil Noh

Electrochemistry Communications (Jul 2022)

Electrochemical properties of the Si thin-film anode deposited on Ti-Nb-Zr shape memory alloy in Li-ion batteries

Joo-Hyeon Bae,
Oyunbayar Nyamaa,
Jun-Seok Lee,
Sang-du Yun,
Seong-Min Woo,
Jeong-Hyeon Yang,
Min-Su Kim,
Jung-Pil Noh

Affiliations

Joo-Hyeon Bae: Department of Energy and Mechanical Engineering and Institute of Marine Industry, Gyeongsang National University, 2 Tongyeonghaean-ro, Tongyeong 53064, South Korea
Oyunbayar Nyamaa: Department of Energy and Mechanical Engineering and Institute of Marine Industry, Gyeongsang National University, 2 Tongyeonghaean-ro, Tongyeong 53064, South Korea
Jun-Seok Lee: Department of Energy and Mechanical Engineering and Institute of Marine Industry, Gyeongsang National University, 2 Tongyeonghaean-ro, Tongyeong 53064, South Korea
Sang-du Yun: Department of Mechanical System Engineering, Gyeongsang National University 2 Tongyeonghaean-ro, Tongyeong 53064, South Korea
Seong-Min Woo: Department of Energy and Mechanical Engineering and Institute of Marine Industry, Gyeongsang National University, 2 Tongyeonghaean-ro, Tongyeong 53064, South Korea
Jeong-Hyeon Yang: Department of Mechanical System Engineering, Gyeongsang National University 2 Tongyeonghaean-ro, Tongyeong 53064, South Korea
Min-Su Kim: Advanced Energy Materials and Components R&D Group, Dongnam Division, Korea Institute of Industrial Technology, 41, Mieumsandan 5-ro 41 beon-gil, gangseo-gu, Busan 46744, South Korea
Jung-Pil Noh: Department of Energy and Mechanical Engineering and Institute of Marine Industry, Gyeongsang National University, 2 Tongyeonghaean-ro, Tongyeong 53064, South Korea; Corresponding author.

Journal volume & issue: Vol. 140
p. 107315

Abstract

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Lithium-ion batteries (LIBs) are widely used, and extensive research has been conducted on new electrode materials. Silicon has been widely studied as an anode material. However, Si has a problem which is the large volume expansion. This study improved the electrochemical properties of Si thin films by employing a Ti-Nb-Zr SMA as a replacement candidate. The electrodes were prepared using two-step DC magnetron sputtering, followed by heat treatment to improve the adhesion between the Si thin film and the Ti-Nb-Zr film of the electrodes. X-ray diffraction confirmed that the SMA changed from the β (BCC) phase structure to the α (HCP) crystalline phase because of the volume changes arising from the Li-Si reactions during the lithiation/delithiation process. Additionally, the heat treatment significantly improved the adhesion between the active materials and substrate, improving the internal charge transfer bond and the martensite properties of the alloy allows it to work in the full sense. This study highlights a high-capacity, long cycle life, and free-standing electrode improvement by combining the shape-memory behavior recrystallization mechanism of heat-treated superelastic passive Ti-Nb-Zr for Si anode materials.

Published in Electrochemistry Communications

ISSN: 1388-2481 (Print); 1873-1902 (Online)
Publisher: Elsevier
Country of publisher: United States
LCC subjects: Technology: Chemical technology: Industrial electrochemistry; Science: Chemistry
Website: https://www.journals.elsevier.com/electrochemistry-communications

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