Preparation and Characterization of MnO2/acid-treated CNT Nanocomposites for Energy Storage with Zinc Ions

Xu, Dongwei; Li, Baohua; Wei, Chunguang; He, Yan‐Bing; Du, Hongda; Chu, Xiangxiang; Qin, Xianying; Yang, Quan‐Hong; Kang, Feiyu

doi:10.1016/j.electacta.2014.04.001

Cited by 260 publications

(155 citation statements)

References 37 publications

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“…Specific capacities varied with the current density increasing from 125 mAh g −1 for 6.25 mA g −1 to 78 mAh g −1 for 2000 mA g −1 . These values are comparable to those obtained previously for different Zn/ MnO 2 batteries [14,15].…”

Section: Methodssupporting

confidence: 92%

Charge storage mechanism of MnO 2 cathodes in Zn/MnO 2 batteries using ionic liquid-based gel polymer electrolytes

Tafur

Abad

Román

et al. 2015

Electrochemistry Communications

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Section: Methodssupporting

confidence: 92%

Charge storage mechanism of MnO 2 cathodes in Zn/MnO 2 batteries using ionic liquid-based gel polymer electrolytes

Tafur

Abad

Román

et al. 2015

Electrochemistry Communications

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“…The flake‐like morphology of the Mn 3 O 4 offers a large surface area providing the electrode with better access to the electrolyte. Also, the Mn 3 O 4 flakes are very thin (∼1 μm) and are deposited on a conductive CP substrate, which can help counter the relatively poor conductivity of Mn 3 O 4 . The addition of 0.2 M MnSO 4 to the electrolyte provides Mn 2+ ions in the electrolyte, which have been shown to reduce the dissolution of Mn from the electrode and help the electrode and electrolyte reach an equilibrium state …”

Section: Resultsmentioning

confidence: 99%

“…Also, the Mn 3 O 4 flakes are very thin (~1 μm) and are deposited on a conductive CP substrate, which can help counter the relatively poor conductivity of Mn 3 O 4 . [53] The addition of 0.2 M MnSO 4 to the electrolyte provides Mn 2 + ions in the electrolyte, which have been shown to reduce the dissolution of Mn from the electrode and help the electrode and electrolyte reach an equilibrium state. [25,28] Table 2 compares the cycling results for battery testing in this work with those from other batteries using Mn-based spinel cathodes.…”

Section: Electrochemical Resultsmentioning

confidence: 99%

Electrodeposited Manganese Oxide on Carbon Paper for Zinc‐Ion Battery Cathodes

Dhiman

Ivey

2019

Batteries & Supercaps

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Nano‐crystalline, flake‐like Mn oxide was electrodeposited onto carbon paper (CP) using a pulsed electrodeposition technique. The electrodeposited Mn oxide was identified as Mn3O4 through a combination of X‐ray photoelectron spectroscopy (XPS), X‐ray diffraction (XRD), and Raman spectroscopy. The Mn3O4 on CP was used as a cathode for Zn‐ion batteries (ZIBs) and showed excellent cyclability at a current density of 1 A g−1 with a capacity retention of 139 % after 200 cycles. Electron microscopy was used to characterize the microstructural changes of the cathode at various stages during discharge/charge cycling. This work in combination with the electrochemical results suggests a two‐step reaction mechanism involving both intercalation and conversion reactions. The results demonstrate that electrodeposition of the cathode material is a simple, quick, and potentially scalable electrode synthesis method for producing high performing Zn‐ion electrodes without the use of binders or other additives.

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“…Compared with lithium‐ion batteries, rechargeable aqueous Zn‐ion batteries (ZIBs), especially Zn‐MnO 2 batteries, become a hotspot due to their distinctive advantages of cost effectiveness, environmental friendly nature, and materials abundance. To date, intensive efforts have been devoted into exploring high‐performance aqueous ZIBs . Physical and chemical changes of electrode materials in Zn‐MnO 2 batteries after cycling have been revealed through ex situ characterization techniques .…”

Section: Introductionmentioning

confidence: 99%

Langmuir–Blodgett Nanowire Devices for In Situ Probing of Zinc‐Ion Batteries

Liu

Hao

Liao

et al. 2019

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In situ monitoring the evolution of electrode materials in micro/nano scale is crucial to understand the intrinsic mechanism of rechargeable batteries. Here a novel on‐chip Langmuir–Blodgett nanowire (LBNW) microdevice is designed based on aligned and assembled MnO2 nanowire quasimonolayer films for directly probing Zn‐ion batteries (ZIBs) in real‐time. With an interdigital device configuration, a splendid Ohmic contact between MnO2 LBNWs and pyrolytic carbon current collector is demonstrated here, enabling a small polarization voltage. In addition, this work reveals, for the first time, that the conductance of MnO2 LBNWs monotonically increases/decreases when the ZIBs are charged/discharged. Multistep phase transition is mainly responsible for the mechanism of the ZIBs, as evidenced by combined high‐resolution transmission electron microscopy and in situ Raman spectroscopy. This work provides a new and adaptable platform for microchip‐based in situ simultaneous electrochemical and physical detection of batteries, which would promote the fundamental and practical research of nanowire electrode materials in energy storage applications.

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Preparation and Characterization of MnO2/acid-treated CNT Nanocomposites for Energy Storage with Zinc Ions

Cited by 260 publications

References 37 publications

Charge storage mechanism of MnO 2 cathodes in Zn/MnO 2 batteries using ionic liquid-based gel polymer electrolytes

Charge storage mechanism of MnO 2 cathodes in Zn/MnO 2 batteries using ionic liquid-based gel polymer electrolytes

Electrodeposited Manganese Oxide on Carbon Paper for Zinc‐Ion Battery Cathodes

Langmuir–Blodgett Nanowire Devices for In Situ Probing of Zinc‐Ion Batteries

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