A Novel Hierarchical Porous 3D Structured Vanadium Nitride/Carbon Membranes for High-performance Supercapacitor Negative Electrodes

Wu, Yage; Yang, Yunlong; Zhao, Xiaoning; Tan, Yongtao; Liu, Ying; Wang, Zhen; Ran, Fen

doi:10.1007/s40820-018-0217-1

Cited by 66 publications

(30 citation statements)

References 52 publications

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“…Aqueous rechargeable zinc-ion batteries (ZIBs) are developed as a battery system, in which low-cost, non-toxic, and naturally abundant zinc metal is used as an anode and environment-friendly neutral aqueous Zn 2+ -containing solution serves as electrolyte [8]. In recent years, a series of high-performance cathode materials for ZIBs have also been studied such as Prussian blue analog [9][10][11], vanadium oxides [12][13][14][15][16][17][18][19], manganese oxides [20][21][22][23][24][25][26][27][28], and some metal sulfides [29][30][31]. Among these materials, MnO 2 is particularly concerned for its high theoretical specific capacity, low cost, eco-friendliness, and diverse crystallographic polymorphs (e.g., α-MnO 2 , δ-MnO 2 , and γ-MnO 2 ) [27,28,32].…”

Section: Introductionmentioning

confidence: 99%

Novel Insights into Energy Storage Mechanism of Aqueous Rechargeable Zn/MnO2 Batteries with Participation of Mn2+

et al. 2019

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HIGHLIGHTS• Pourbaix diagram of Mn-Zn-H 2 O system was used to analyze the charge-discharge processes of Zn/MnO 2 batteries.• Electrochemical reactions with the participation of various ions inside Zn/MnO 2 batteries were revealed.• A detailed explanation of phase evolution inside Zn/MnO 2 batteries was provided.ABSTRACT Aqueous rechargeable Zn/MnO 2 zinc-ion batteries (ZIBs) are reviving recently due to their low cost, non-toxicity, and natural abundance.However, their energy storage mechanism remains controversial due to their complicated electrochemical reactions. Meanwhile, to achieve satisfactory cyclic stability and rate performance of the Zn/MnO 2 ZIBs, Mn 2+ is introduced in the electrolyte (e.g., ZnSO 4 solution), which leads to more complicated reactions inside the ZIBs systems. Herein, based on comprehensive analysis methods including electrochemical analysis and Pourbaix diagram, we provide novel insights into the energy storage mechanism of Zn/MnO 2 batteries in the presence of Mn 2+ . A complex series of electrochemical reactions with the coparticipation of Zn 2+ , H + , Mn 2+ , SO 4 2− , and OH − were revealed. During the first discharge process, co-insertion of Zn 2+ and H + promotes the transformation of MnO 2 into Zn x MnO 4 , MnOOH, and Mn 2 O 3 , accompanying with increased electrolyte pH and the formation of ZnSO 4 ·3Zn(OH) 2 ·5H 2 O. During the subsequent charge process, Zn x MnO 4 , MnOOH, and Mn 2 O 3 revert to α-MnO 2 with the extraction of Zn 2+ and H + , while ZnSO 4 ·3Zn(OH) 2 ·5H 2 O reacts with Mn 2+ to form ZnMn 3 O 7 ·3H 2 O. In the following charge/discharge processes, besides aforementioned electrochemical reactions, Zn 2+ reversibly insert into/extract from α-MnO 2 , Zn x MnO 4 , and ZnMn 3 O 7 ·3H 2 O hosts; ZnSO 4 ·3Zn(OH) 2 ·5H 2 O, Zn 2 Mn 3 O 8 , and ZnMn 2 O 4 convert mutually with the participation of Mn 2+ . This work is believed to provide theoretical guidance for further research on high-performance ZIBs.

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Section: Introductionmentioning

confidence: 99%

Novel Insights into Energy Storage Mechanism of Aqueous Rechargeable Zn/MnO2 Batteries with Participation of Mn2+

et al. 2019

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“…Up to now, considerable efforts have been made aiming at developing advanced carbon materials for SCs with high energy density. 0D Carbon dots [2], 1D carbon nanotubes [3], and 2D graphenes [4] were all explored as electrodes for high performance SCs. In particular, 3D carbon frameworks with high specific surface area, hierarchical porosity and large conductive network are considered as promising electrodes for SCs [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

3D Carbon Frameworks for Ultrafast Charge/Discharge Rate Supercapacitors with High Energy-Power Density

et al. 2020

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Carbon-based electric double layer capacitors (EDLCs) hold tremendous potentials due to their high-power performance and excellent cycle stability. However, the practical use of EDLCs is limited by the low energy density in aqueous electrolyte and sluggish diffusion kinetics in organic or/and ionic liquids electrolyte. Herein, 3D carbon frameworks (3DCFs) constructed by interconnected nanocages (10–20 nm) with an ultrathin wall of ca. 2 nm have been fabricated, which possess high specific surface area, hierarchical porosity and good conductive network. After deoxidization, the deoxidized 3DCF (3DCF-DO) exhibits a record low IR drop of 0.064 V at 100 A g−1 and ultrafast charge/discharge rate up to 10 V s−1. The related device can be charged up to 77.4% of its maximum capacitance in 0.65 s at 100 A g−1 in 6 M KOH. It has been found that the 3DCF-DO has a great affinity to EMIMBF4, resulting in a high specific capacitance of 174 F g−1 at 1 A g−1, and a high energy density of 34 Wh kg−1 at an ultrahigh power density of 150 kW kg−1 at 4 V after a fast charge in 1.11 s. This work provides a facile fabrication of novel 3D carbon frameworks for supercapacitors with ultrafast charge/discharge rate and high energy-power density.

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“…Since Kumta’s work on vanadium nitride (VN) nanostructure [ 1 , 2 ], VN has extensively been used as anode material for supercapacitors (SCs) [ 3 , 4 , 5 ]. This is due to its large theoretical capacitance [ 6 , 7 ], suitable working negative potential window [ 8 , 9 , 10 ], excellent electrical conductivity [ 10 ] as well as pseudocapacitive properties [ 11 ]. Considering the electrochemical instability of VN in aqueous solution [ 12 , 13 ], the pseudocapacitance charge storage of VN that varies in different aqueous electrolytes (such as KOH and LiCl) also remains a bottleneck [ 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Asymmetric Pseudocapacitors Based on Interfacial Engineering of Vanadium Nitride Hybrids

Xiong

Tan

et al. 2020

Nanomaterials

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Vanadium nitride (VN) shows promising electrochemical properties as an energy storage devices electrode, specifically in supercapacitors. However, the pseudocapacitive charge storage in aqueous electrolytes shows mediocre performance. Herein, we judiciously demonstrate an impressive pseudocapacitor performance by hybridizing VN nanowires with pseudocapacitive 2D-layered MoS2 nanosheets. Arising from the interfacial engineering and pseudocapacitive synergistic effect between the VN and MoS2, the areal capacitance of VN/MoS2 hybrid reaches 3187.30 mF cm−2, which is sevenfold higher than the pristine VN (447.28 mF cm−2) at a current density of 2.0 mA cm−2. In addition, an asymmetric pseudocapacitor assembled based on VN/MoS2 anode and TiN coated with MnO2 (TiN/MnO2) cathode achieves a remarkable volumetric capacitance of 4.52 F cm−3 and energy density of 2.24 mWh cm−3 at a current density of 6.0 mA cm−2. This work opens a new opportunity for the development of high-performance electrodes in unfavorable electrolytes towards designing high areal-capacitance electrode materials for supercapacitors and beyond.

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A Novel Hierarchical Porous 3D Structured Vanadium Nitride/Carbon Membranes for High-performance Supercapacitor Negative Electrodes

Cited by 66 publications

References 52 publications

Novel Insights into Energy Storage Mechanism of Aqueous Rechargeable Zn/MnO2 Batteries with Participation of Mn2+

Novel Insights into Energy Storage Mechanism of Aqueous Rechargeable Zn/MnO2 Batteries with Participation of Mn2+

3D Carbon Frameworks for Ultrafast Charge/Discharge Rate Supercapacitors with High Energy-Power Density

Asymmetric Pseudocapacitors Based on Interfacial Engineering of Vanadium Nitride Hybrids

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