Journal
CHEMICAL SCIENCE
Volume 10, Issue 12, Pages 3602-3607Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8sc04967j
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Funding
- National Natural Science Foundation of China [21822509, U1810110, 31530009, 51672315]
- Guangdong Natural Science Funds for Distinguished Young Scholar [2014A030306048]
- Tip-top Scientific and Technical Innovative Youth Talents of Guangdong Special Support Program [2015TQ01C205]
- Pearl River Nova Program of Guangzhou [201610010080]
- Science and Technology Planning Project of Guangzhou City for International Cooperation Program [20170430020]
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The exploration of a stable and high-rate anode is of pivotal importance for achieving advanced aqueous rechargeable batteries. Owing to the beneficial properties of high conductivity, suitable negative working voltage, and three-electron redox, bismuth (Bi) is considered as a promising anode material, but it suffers from poor stability. Here, we successfully endow Bi nanoflakes (NFs) with prominent cycling performance by a one-step surface oxidation approach to remarkably boost its reversibility. As a result, the partially oxidized Bi NFs (BiOx) show an admirable capacity (0.38 mA h cm(-2) at 2 mA cm(-2)), good rate capability and superior long-term stability (almost no capacity decay after 20000 cycles). Furthermore, a durable aqueous Ni//Bi battery is constructed based on the optimized BiOx anode, which exhibits excellent durability with 96% capacity retention after 5000 cycles. This study could open a new avenue for the rational design of efficient anodes for eco-friendly and reliable aqueous rechargeable batteries.
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