Journal Article10.1021/ACSAMI.8B19575
Oxygen Vacancies Boost δ-Bi2O3 as a High-Performance Electrode for Rechargeable Aqueous Batteries.
Tingting Qin,Xiaoyu Zhang,Dong F. Wang,Ting Deng,Haoxiang Wang,Xiaofei Liu,Xiaoyuan Shi,Zhengming Li,Hong Chen,Xiang-Min Meng,Wei Zhang,Wei Zhang,Weitao Zheng +12 more
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TL;DR: It is demonstrated 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.
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Abstract: 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 ...
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References
Decrease of the required dopant concentration for δ-Bi2O3 crystal stabilization through thermal quenching during single-step flame spray pyrolysis
Jochen A.H. Dreyer,Suman Pokhrel,Johannes Birkenstock,Miguel A. G. Hevia,Marco Schowalter,Andreas Rosenauer,Atsushi Urakawa,Wey Yang Teoh,Lutz Mädler +8 more
TL;DR: In this paper, the synthesis of stable nano-sized δ-Bi2O3 using versatile and rapid flame spray pyrolysis (FSP) combined with in situ Ti and/or Mn doping for an enhanced thermal stability is reported.
Vertical bismuth oxide nanosheets with enhanced crystallinity: promising stable anodes for rechargeable alkaline batteries
Haibing Zheng,Haibing Zheng,Haodong Li,Minghao Yu,Min Zhang,Yexiang Tong,Faliang Cheng,Xihong Lu,Xihong Lu +8 more
TL;DR: In this paper, a facile synthesis of Bi2O3 nanosheets vertically aligned on carbon paper was reported, which achieved good electrochemical properties as anodes for alkaline batteries.
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Hybrid thermoelectric battery electrode FeS2 study
Chao Wang,Niu Yi,Jing Jiang,Chen Yide,Tian Hanqing,Zhang Rui,Ting Zhou,Xia Junfeng,Yan Pan,Shuangyin Wang +9 more
TL;DR: In this paper, the thermoelectric properties of FeS2 as battery electrode are studied in order to enhance its performance and develop a system to utilize battery heat efficiently and securely.
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Ammonia-annealed TiO2 as a negative electrode material in li-ion batteries: N doping or oxygen deficiency?
Edgar Ventosa,Wei Xia,Stefan Klink,Fabio La Mantia,Bastian Mei,Martin Muhler,Wolfgang Schuhmann +6 more
TL;DR: The results suggest that the creation of oxygen vacancies upon ammonia annealing is the main reason for the improvement of the stability and C-rate capability of anatase TiO2.
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ZrO2-incorporated Bi6O6(OH)3(NO3)3·1.5H2O with superior photocatalytic activity for degradation of malachite green
TL;DR: In this article, the performance of ZrO2-modified Bi6O6(OH)3(NO3)3·1.5H2O was investigated for the degradation of malachite green.
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