High-rate and low-temperature performance of germanium nanowires anode for lithium-ion batteriesстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 17 июня 2021 г.
Аннотация:The original version of a negative electrode of lithium-ion battery is prepared. To this end the arrays of Genanowires were electrodeposited from an aqueous solution onto a titanium substrate with drop-like indiumcrystallization centers. The nanowires were characterized by SEM, TEM, EDX, XPS, galvanostatic cycling,CV, and EIS. Electrochemical tests were carried out in a wide temperature range with using the propylene-carbonate-based electrolyte. The electrochemical performances of the nanowires were shown to be dependent onthe current density upon electrodeposition. The nanowires with diameter 20 to 40 nm and length up to 0.5 μmare covered with a thin oxide layer, consisting of both stoichiometric and non-stoichiometric germaniumoxides. The electrodes demonstrate excellent features, namely room-temperature specific capacity ca.1300 mAh g−1 at 1C and 4C rate, and about 850 mAh g−1 at 24C, as well as good low-temperatureperformance, 255 mAh g−1 at −50 °C.