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Oxygen Vacancies Boost δ-Bi2O3 as a High-Performance Electrode for Rechargeable Aqueous Batteries
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-12-13 00:00:00 , DOI: 10.1021/acsami.8b19575 Tingting Qin 1 , Xiaoyu Zhang 1 , Dong Wang 1 , Ting Deng 1 , Haoxiang Wang 1 , Xiaofei Liu 1 , Xiaoyuan Shi 1 , Zhengming Li 1 , Hong Chen 1 , Xiangmin Meng 2 , Wei Zhang 1, 3, 4 , Weitao Zheng 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-12-13 00:00:00 , DOI: 10.1021/acsami.8b19575 Tingting Qin 1 , Xiaoyu Zhang 1 , Dong Wang 1 , Ting Deng 1 , Haoxiang Wang 1 , Xiaofei Liu 1 , Xiaoyuan Shi 1 , Zhengming Li 1 , Hong Chen 1 , Xiangmin Meng 2 , Wei Zhang 1, 3, 4 , Weitao Zheng 1
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Metal oxides as electrode materials are of great potential for rechargeable aqueous batteries. However, they suffer from inferior cycle stability and rate capability because of poor electronic and ionic conductivities. Herein, taking vertically orientated Bi2O3 nanoflakes on Ti substrates as examples, we find that the δ-Bi2O3 electrode with plenty of positively charged oxygen defects show remarkably higher specific capacity (264 mA h g–1) and far superior rate capability than that of α-Bi2O3 with less oxygen vacancies. Through pinpointing the existence form and the role of oxygen vacancies within the electrochemical processes, we demonstrate that oxygen vacancies in δ-Bi2O3 can not only promote electrical conductivity but also serve as central entrepots collecting OH– groups via electrostatic force effect, which has boosted the oxidation reaction and enhanced the electrochemical properties. Our work merits an excellent Bi2O3 negative electrode material via giving full play to the role of oxygen vacancies in electrochemical energy storage.
中文翻译：
氧空位加速δ碧2 Ø 3作为高性能电极的可充电电池水
金属氧化物作为电极材料对于可充电水性电池具有巨大的潜力。然而，由于不良的电子和离子电导率，它们具有较差的循环稳定性和速率能力。这里，服用垂直定向的Bi 2 ö 3个上的Ti基片作为例子纳米薄片，我们发现，δ-Bi系2 ö 3用大量正电荷的氧缺陷的电极显示出显着更高的比容量（264毫安汞柱-1）和远优于率能力比的α-Bi系2 ö 3氧空位少。通过精确定位的存在形式和氧空位的电化学过程中的作用，我们证明在氧空位δ-Bi系2 ö 3不仅能促进导电性，但也可以作为中央中转港收集OH -通过静电力的效果，基团，其促进了氧化反应并增强了电化学性能。通过充分发挥氧空位在电化学储能中的作用，我们的工作采用了优异的Bi 2 O 3负极材料。
更新日期：2018-12-13
中文翻译：
氧空位加速δ碧2 Ø 3作为高性能电极的可充电电池水
金属氧化物作为电极材料对于可充电水性电池具有巨大的潜力。然而，由于不良的电子和离子电导率，它们具有较差的循环稳定性和速率能力。这里，服用垂直定向的Bi 2 ö 3个上的Ti基片作为例子纳米薄片，我们发现，δ-Bi系2 ö 3用大量正电荷的氧缺陷的电极显示出显着更高的比容量（264毫安汞柱-1）和远优于率能力比的α-Bi系2 ö 3氧空位少。通过精确定位的存在形式和氧空位的电化学过程中的作用，我们证明在氧空位δ-Bi系2 ö 3不仅能促进导电性，但也可以作为中央中转港收集OH -通过静电力的效果，基团，其促进了氧化反应并增强了电化学性能。通过充分发挥氧空位在电化学储能中的作用，我们的工作采用了优异的Bi 2 O 3负极材料。
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