Nanoporous Anodic Bismuth Oxide for Electrochemical Energy Storage

Superfast (≤10 min) room-temperature (300 K) chemical synthesis of three-dimensional (3-D) polycrystalline and mesoporous bismuth(III) oxide (BiO) nanostructured negatrode (as an abbreviation of negative electrode) materials, viz., coconut shell, marigold, honey nest cross section and rose with different surface areas, charge transfer resistances, and electrochemical performances essential for energy storage, harvesting, and even catalysis devices, are directly grown onto Ni foam without and with poly(ethylene glycol), ethylene glycol, and ammonium fluoride surfactants, respectively. Smaller diffusion lengths, caused by the involvement of irregular crevices, allow electrolyte ions to infiltrate deeply, increasing the utility of inner active sites for the following electrochemical performance. A marigold 3-D BiO electrode of 58 m·g surface area has demonstrated a specific capacitance of 447 F·g at 2 A·g and chemical stability of 85% even after 5000 redox cycles at 10 A·g in a 6 M KOH electrolyte solution, which were higher than those of other morphology negatrode materials. An asymmetric supercapacitor (AS) device assembled with marigold BiO negatrode and manganese(II) carbonate quantum dots/nickel hydrogen-manganese(II)-carbonate (MnCOQDs/NiH-Mn-CO) positrode corroborates as high as 51 Wh·kg energy at 1500 W·kg power and nearly 81% cycling stability even after 5000 cycles. The obtained results were comparable or superior to the values reported previously for other BiO morphologies. This AS assembly glowed a red-light-emitting diode for 20 min, demonstrating the scientific and industrial credentials of the developed superfast BiO nanostructured negatrodes in assembling various energy storage devices.

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“…The possible mechanism of the oxidation and reduction peaks in CV can be understood from the following equations. 40,47,48…”

Section: Resultsmentioning

confidence: 99%

Polycrystalline and Mesoporous 3-D Bi₂O₃ Nanostructured Negatrodes for High-Energy and Power-Asymmetric Supercapacitors: Superfast Room-Temperature Direct Wet Chemical Growth

Shinde

Xia

Yun

et al. 2018

ACS Appl. Mater. Interfaces

112

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“…600 mAh g –1 ), a very low power density was observed. Since then, many groups have studied different structures of bismuth oxide, including quantum dots, nanostructures, and micronetworks, as anode materials for organic electrolyte-based LIBs and NaIBs. − Despite obtaining high gravimetric capacities up to 1500 mAh g –1 , these studies in the last 30 years have been rather scattered, mainly due to the low cycling stability of these alloying materials because of massive volume changes during the ion (de)insertion. Recently, bismuth oxide has been utilized as an anode material for aqueous metal-ion batteries. , Zuo et al presented bismuth oxide-based electrodes, which deliver gravimetric capacities close to the theoretical value (357 mAh g –1 based on six-electron transfer) and an excellent power density in a neutral mixed Li + electrolyte; nevertheless, the electrodes lost ∼18% of their initial capacity only after 100 cycles (half-cell test) …”

Section: Introductionmentioning

confidence: 99%

Near-Atomic-Thick Bismuthene Oxide Microsheets for Flexible Aqueous Anodes: Boosted Performance upon 3D → 2D Transition

Beladi‐Mousavi

Plutnar

Pumera

2020

ACS Appl. Mater. Interfaces

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Aqueous batteries provide safety, but they usually suffer from low energy and short lifetimes, limiting their use for large-scale energy storage. Two-dimensional materials with infinite lateral dimensions have inherent properties such as high surface area and remarkable power density and cycling stability that are shown to be critical for the next generation of energy storage systems. Here, ultrathin bismuthene oxide with a large aspect ratio is studied as an anode material for rechargeable aqueous metal-ion batteries. The metal oxides are prepared via a novel electrochemical system allowing for a smooth, high-quality transition of bismuthene to bismuthene oxide in a short time. This anodic system is shown to overcome major limiting factors of such batteries, including low capacity and irreversible and unstable redox reactions in aqueous electrolytes. The essential energy storage properties of two-dimensional (2D) microsheets, without the addition of conductive additives and binders, are compared with those of the corresponding three-dimensional (3D) structures. Notably, the battery performance of 2D microsheets is significantly better than that of nanoparticles from all examined aspects, including power density and potential and cycling stability, while exhibiting a capacity density close to their theoretical value. Moreover, 2D microsheets have shown impressive mechanical flexibility related to the ultrathin thickness of individual microsheets and strong interaction between them after film deposition. Combining the excellent energy storage properties of bismuthene oxide, the simple electrode preparation procedure, the inherent flexing characteristic, and the nontoxicity of both the battery material and the electrolyte makes this 2D material an exceptional candidate for large-scale wearable green electronics.

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“…25 Recently the present authors reported formation of nanoporous anodic oxide of bismuth by a facile anodization process. [26][27][28][29] The * Electrochemical Society Member. z E-mail: chit7390@vandals.uidaho.edu; kalyanchitrada@gmail.com nanoporous β-Bi 2 O 3 showed relatively high initial photocurrent density, yet the photocurrent decayed upon continuous illumination.…”

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confidence: 99%

Enhanced Performance of β-Bi₂O₃by In-Situ Photo-Conversion to Bi₂O₃-BiO_2-xComposite Photoanode for Solar Water Splitting

Chitrada

Gakhar

Chidambaram

et al. 2016

J. Electrochem. Soc.

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Ordered nanoporous bismuth oxide layer consisting of metastable β-Bi 2 O 3 phase that showed n-type semiconductivity was synthesized by a simple electrochemical anodization of bismuth substrate. When the anodic nanoporous β-Bi 2 O 3 samples were tested as photoanodes for solar water splitting application in 0.5 M Na 2 SO 4 (pH:5.8), and 1 M KOH (pH:13.7), the photocurrent decayed continuously with time from an initial value of 0.95 mA/cm 2 under 1-sun illumination at a bias potential of 1.5 V RHE . Accumulation of photo generated holes at the photoanode/ electrolyte was attributed to the photocurrent decay. Addition of methanol as sacrificial hole scavenger was not found to be effective for the bismuth oxide photoanodes. When hydrogen peroxide was added to the 0.5 M Na 2 SO 4 electrolyte, the photocurrent density increased to ∼4 mA/cm 2 and was stable for more than 1 h of illumination of AM1.5 global light at 1.5 V RHE . Addition of hydrogen peroxide to the 1 M KOH solution showed a gradual increase in the photocurrent density for the first 300 seconds of light illumination to a maximum value of ∼10 mA/cm 2 at 0.65 V RHE and then it decreased continuously. The high photocurrent density of nanoporous β-Bi Bismuth based mixed oxides such as BiVO 4 , BiFeO 3 , BiWO 6 , Bi 3 NbO 7 , and Bi 2 MoO 6 are being actively investigated as promising high efficiency photocatalysts for solar water splitting applications. 1-11These bismuth based oxides show predominantly n-type semiconductivity and therefore function as photoanodes in the photoelectrochemical water splitting process. A significant amount of literature is available on the photoelectrochemical behavior of bismuth based ternary oxides, however very few studies have reported the performance of the binary Bi 2 O 3 which is the elementary constituent of the advanced bismuth mixed oxides. The photocatalytic behavior of the bismuth based oxides is well documented and the factors that limit their performance is well understood. Most importantly they exhibit low catalytic activity for oxygen evolution, which results in hole accumulation at the electrode/electrolyte interface. In order to overcome this limitation, a thin layer of oxygen evolution catalysts such as Co-Pi, FeOOH, Ni(OH) 2 or CoPO 4 is usually coated on the photoanodes.12-17 The binary and ternary bismuth oxides show more or less similar electronic structures, where the valence bands of both binary Bi 2 O 3 , and mixed bismuth oxides are considered to be formed by O-2p and Bi-6s orbitals. 18,19 The top of the Bi-6s orbital is positioned at more negative potential than that of O-2p. [20][21][22] The conduction band of Bi 2 O 3 is predominantly formed by Bi-6p orbitals. Whereas, the conduction band of mixed bismuth oxide is determined by the d-orbitals of transitions metals present in the mixed oxide. Bismuth oxide shows enhanced mobility of charge carriers because of its well-dispersed valence bands and it has high refractive index and large dielectric constant due to lone electron pairs of Bi(III) 6s 2 that...

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Nanoporous Anodic Bismuth Oxide for Electrochemical Energy Storage

Cited by 15 publications

References 13 publications

Polycrystalline and Mesoporous 3-D Bi₂O₃ Nanostructured Negatrodes for High-Energy and Power-Asymmetric Supercapacitors: Superfast Room-Temperature Direct Wet Chemical Growth

Polycrystalline and Mesoporous 3-D Bi₂O₃ Nanostructured Negatrodes for High-Energy and Power-Asymmetric Supercapacitors: Superfast Room-Temperature Direct Wet Chemical Growth

Near-Atomic-Thick Bismuthene Oxide Microsheets for Flexible Aqueous Anodes: Boosted Performance upon 3D → 2D Transition

Enhanced Performance of β-Bi₂O₃by In-Situ Photo-Conversion to Bi₂O₃-BiO_2-xComposite Photoanode for Solar Water Splitting

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Nanoporous Anodic Bismuth Oxide for Electrochemical Energy Storage

Cited by 15 publications

References 13 publications

Polycrystalline and Mesoporous 3-D Bi2O3 Nanostructured Negatrodes for High-Energy and Power-Asymmetric Supercapacitors: Superfast Room-Temperature Direct Wet Chemical Growth

Polycrystalline and Mesoporous 3-D Bi2O3 Nanostructured Negatrodes for High-Energy and Power-Asymmetric Supercapacitors: Superfast Room-Temperature Direct Wet Chemical Growth

Near-Atomic-Thick Bismuthene Oxide Microsheets for Flexible Aqueous Anodes: Boosted Performance upon 3D → 2D Transition

Enhanced Performance of β-Bi2O3by In-Situ Photo-Conversion to Bi2O3-BiO2-xComposite Photoanode for Solar Water Splitting

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Polycrystalline and Mesoporous 3-D Bi₂O₃ Nanostructured Negatrodes for High-Energy and Power-Asymmetric Supercapacitors: Superfast Room-Temperature Direct Wet Chemical Growth

Polycrystalline and Mesoporous 3-D Bi₂O₃ Nanostructured Negatrodes for High-Energy and Power-Asymmetric Supercapacitors: Superfast Room-Temperature Direct Wet Chemical Growth

Enhanced Performance of β-Bi₂O₃by In-Situ Photo-Conversion to Bi₂O₃-BiO_2-xComposite Photoanode for Solar Water Splitting