2D vanadium doped manganese dioxides nanosheets for pseudocapacitive energy storage

Hu, Zhimi; Xu, Xiao; Huang, Liang; Chen, Chi; Li, Tianqi; Su, Tiecheng; Cheng, Xiaofeng; Liu, Miao; Zhang, Yanrong; Zhou, Jun

doi:10.1039/c5nr04682c

Cited by 71 publications

(48 citation statements)

References 21 publications

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“…For instance, Chen's group fabricated Au‐doped MnO 2 film by a physical vapor deposition and showed enhanced electronic conductivity and electrochemical capacitance . Hu et al found that doping V into hydrothermal‐synthesized MnO 2 could not only enhance the conductivity of MnO 2 , but also induce morphology change . However, these reported metal ion doping processes usually require long time or tedious steps, and beyond that their enhancement mechanism is still not clear and in dispute .…”

Section: Introductionmentioning

confidence: 99%

Defect Promoted Capacity and Durability of N‐MnO_2–_x Branch Arrays via Low‐Temperature NH₃ Treatment for Advanced Aqueous Zinc Ion Batteries

Zhang

Deng

Luo

et al. 2019

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Defect engineering (doping and vacancy) has emerged as a positive strategy to boost the intrinsic electrochemical reactivity and structural stability of MnO2‐based cathodes of rechargeable aqueous zinc ion batteries (RAZIBs). Currently, there is no report on the nonmetal element doped MnO2 cathode with concomitant oxygen vacancies, because of its low thermal stability with easy phase transformation from MnO2 to Mn3O4 (≥300 °C). Herein, for the first time, novel N‐doped MnO2–x (N‐MnO2–x) branch arrays with abundant oxygen vacancies fabricated by a facile low‐temperature (200 °C) NH3 treatment technology are reported. Meanwhile, to further enhance the high‐rate capability, highly conductive TiC/C nanorods are used as the core support for a N‐MnO2–x branch, forming high‐quality N‐MnO2–x@TiC/C core/branch arrays. The introduced N dopants and oxygen vacancies in MnO2 are demonstrated by synchrotron radiation technology. By virtue of an integrated conductive framework, enhanced electron density, and increased surface capacitive contribution, the designed N‐MnO2–x@TiC/C arrays are endowed with faster reaction kinetics, higher capacity (285 mAh g−1 at 0.2 A g−1) and better long‐term cycles (85.7% retention after 1000 cycles at 1 A g−1) than other MnO2‐based counterparts (55.6%). The low‐temperature defect engineering sheds light on construction of advanced cathodes for aqueous RAZIBs.

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Section: Introductionmentioning

confidence: 99%

Defect Promoted Capacity and Durability of N‐MnO_2–_x Branch Arrays via Low‐Temperature NH₃ Treatment for Advanced Aqueous Zinc Ion Batteries

Zhang

Deng

Luo

et al. 2019

Small

177

103

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“…To further demonstrate the practical applications of the MoSe 2 electrode materials, a novel asymmetric supercapacitor (ASC) was fabricated based on MoSe 2 and V‐doped MnO 2 (V‐MnO 2 ), which were used as the negative and positive electrode materials, respectively. To investigate the appropriate voltage window of the ASC device, the CV measurements of MoSe 2 and V‐MnO 2 electrode were carried out in a three‐electrode cell, respectively ( Figure a).…”

Section: Resultsmentioning

confidence: 97%

Mass Production of High‐Quality Transition Metal Dichalcogenides Nanosheets via a Molten Salt Method

Jin

et al. 2019

Adv Funct Materials

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2D transition metal dichalcogenides (TMDs) are well suited for energy storage and field-effect transistors because of their thickness-dependent chemical and physical properties. However, as current synthetic methods for 2D TMDs cannot integrate both advantages of liquid-phase syntheses (i.e., massive production and homogeneity) and chemical vapor deposition (i.e., high quality and large lateral size), it still remains a great challenge for mass production of high-quality 2D TMDs. Here, a molten salt method to massively synthesize various high-crystalline TMDs nanosheets (MoS 2 , WS 2 , MoSe 2 , and WSe 2 ) with the thicknesses less than 5 nm is reported, with the production yield over 68% with the reaction time of only several minutes. Additionally, the thickness and size of the as-synthesized nanosheets can be readily controlled through adjusting reaction time and temperature. The assynthesized MoSe 2 nanosheets exhibit good electrochemical performance as pseudocapacitive materials. It is further anticipates that this work will provide a promising strategy for rapid mass production of high-quality nonoxides nanosheets for energy-related applications and beyond.

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“…Vanadium-doped MnO 2 nanoparticles were prepared by different routes including the redox reaction [134,144,145]. Alfaruqi et al [135] used a simple redox reaction between Mn(CH 3 COO) 2 ·4H 2 O and KMnO 4 in aqueous solution added to a solution containing V 2 O 5 to obtain α -MnO 2 nanoparticles after annealing at 450 °C for 5 h. This material was used as electrode for zinc-ion batteries.…”

Section: Doped-mno2 Materialsmentioning

confidence: 99%

Nanostructured MnO2 as Electrode Materials for Energy Storage

2017

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Manganese dioxides, inorganic materials which have been used in industry for more than a century, now find great renewal of interest for storage and conversion of energy applications. In this review article, we report the properties of MnO2 nanomaterials with different morphologies. Techniques used for the synthesis, structural, physical properties, and electrochemical performances of periodic and aperiodic frameworks are discussed. The effect of the morphology of nanosized MnO2 particles on their fundamental features is evidenced. Applications as electrodes in lithium batteries and supercapacitors are examined.

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2D vanadium doped manganese dioxides nanosheets for pseudocapacitive energy storage

Cited by 71 publications

References 21 publications

Defect Promoted Capacity and Durability of N‐MnO_2–_x Branch Arrays via Low‐Temperature NH₃ Treatment for Advanced Aqueous Zinc Ion Batteries

Defect Promoted Capacity and Durability of N‐MnO_2–_x Branch Arrays via Low‐Temperature NH₃ Treatment for Advanced Aqueous Zinc Ion Batteries

Mass Production of High‐Quality Transition Metal Dichalcogenides Nanosheets via a Molten Salt Method

Nanostructured MnO2 as Electrode Materials for Energy Storage

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2D vanadium doped manganese dioxides nanosheets for pseudocapacitive energy storage

Cited by 71 publications

References 21 publications

Defect Promoted Capacity and Durability of N‐MnO2–x Branch Arrays via Low‐Temperature NH3 Treatment for Advanced Aqueous Zinc Ion Batteries

Defect Promoted Capacity and Durability of N‐MnO2–x Branch Arrays via Low‐Temperature NH3 Treatment for Advanced Aqueous Zinc Ion Batteries

Mass Production of High‐Quality Transition Metal Dichalcogenides Nanosheets via a Molten Salt Method

Nanostructured MnO2 as Electrode Materials for Energy Storage

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Product

Resources

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Defect Promoted Capacity and Durability of N‐MnO_2–_x Branch Arrays via Low‐Temperature NH₃ Treatment for Advanced Aqueous Zinc Ion Batteries

Defect Promoted Capacity and Durability of N‐MnO_2–_x Branch Arrays via Low‐Temperature NH₃ Treatment for Advanced Aqueous Zinc Ion Batteries