Electrochemical lithiation of silicon with varied crystallographic orientation
- Авторлар: Astrova E.1, Rumyantsev A.1, Li G.1, Nashchekin A.1, Kazantsev D.1, Ber B.1, Zhdanov V.1
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Мекемелер:
- Ioffe Physical–Technical Institute
- Шығарылым: Том 50, № 7 (2016)
- Беттер: 963-969
- Бөлім: Physics of Semiconductor Devices
- URL: https://journals.rcsi.science/1063-7826/article/view/197492
- DOI: https://doi.org/10.1134/S1063782616070022
- ID: 197492
Дәйексөз келтіру
Аннотация
The anisotropy of lithium intercalation into the silicon anodes of Li-ion batteries is studied on microstructures having the form of a grid with 0.5-μm-thick vertical walls and on silicon wafers of varied orientation. Electrochemical lithiation is performed at room temperature in the galvanostatic mode. The charging curves of the microstructure and flat Si anodes are examined. Secondary-ion mass spectroscopy is used to determine the distribution of intercalated Li atoms across the wafer thickness. The experimental data are analyzed in terms of the two-phase model in which the lithiation process is limited by the propagation velocity of the front between the amorphous alloy with a high Li content and the crystalline Si substrate. The relationship between the rates of Li intercalation into different crystallographic planes: (110), (111), and (100), is found to be V110: V111: V100 = 3.1: 1.1: 1.0. It is demonstrated that microstructure anodes with (110) walls have the highest cycle life and withstand ~600 cycles when charged and discharged at a rate of 0.36 C.
Авторлар туралы
E. Astrova
Ioffe Physical–Technical Institute
Хат алмасуға жауапты Автор.
Email: east@mail.ioffe.ru
Ресей, St. Petersburg, 194021
A. Rumyantsev
Ioffe Physical–Technical Institute
Email: east@mail.ioffe.ru
Ресей, St. Petersburg, 194021
G. Li
Ioffe Physical–Technical Institute
Email: east@mail.ioffe.ru
Ресей, St. Petersburg, 194021
A. Nashchekin
Ioffe Physical–Technical Institute
Email: east@mail.ioffe.ru
Ресей, St. Petersburg, 194021
D. Kazantsev
Ioffe Physical–Technical Institute
Email: east@mail.ioffe.ru
Ресей, St. Petersburg, 194021
B. Ber
Ioffe Physical–Technical Institute
Email: east@mail.ioffe.ru
Ресей, St. Petersburg, 194021
V. Zhdanov
Ioffe Physical–Technical Institute
Email: east@mail.ioffe.ru
Ресей, St. Petersburg, 194021