Engineering high reversibility and fast kinetics of Bi nanoflakes by surface modulation for ultrastable nickel-bismuth batteries.
作者： Yinxiang Zeng , Mengying Wang , Wanyi He , Pingping Fang , Mingmei Wu
DOI: 10.1039/C8SC04967J
关键词:
摘要: The exploration of a stable and high-rate anode is pivotal importance for achieving advanced aqueous rechargeable batteries. Owing to the beneficial properties high conductivity, suitable negative working voltage, three-electron redox, bismuth (Bi) considered as promising material, but it suffers from poor stability. Here, we successfully endow Bi nanoflakes (NFs) with prominent cycling performance by one-step surface oxidation approach remarkably boost its reversibility. As result, partially oxidized NFs (BiOx) show an admirable capacity (0.38 mA h cm−2 at 2 cm−2), good rate capability superior long-term stability (almost no decay after 20 000 cycles). Furthermore, durable Ni//Bi battery constructed based on optimized BiOx anode, which exhibits excellent durability 96% retention 5000 cycles. This study could open new avenue rational design efficient anodes eco-friendly reliable
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