Mo-doped NH4V4O10 with enhanced electrochemical performance in aqueous Zn-ion batteries

Wang, Hai; Jing, Ruiping; Shi, Jingran; Zhang, Mengyuan; Jin, Sanmei; Xiong, Zhonglong; Guo, Long; Wang, Qingbo

doi:10.1016/j.jallcom.2020.158380

Cited by 33 publications

(13 citation statements)

References 54 publications

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“…In the aforementioned formula, τ is the charging/discharging time (s), m B is the active substance mass, and M B is the relative molecular mass, V m is the molar volume (cm 3 /mol), S is the pole piece area (cm 2 ), Δ E s is the steady-state voltage and Δ E t is the voltage change during the current pulse. According, it is clear from the calculation that the value of D Zn 2+ is about 10 –10 to 10 –9 (as in Figure f), which exceeds that of other vanadium-based oxides, such as PTDOE-VO, ZnVOH/CC, V 3 O 7 ·H 2 O/rGO, Mo-doped NH 4 V 4 O 10 , and NaV 6 O 15 /V 2 O 5 …”

Section: Analysis and Discussionmentioning

confidence: 84%

Oxygen Defect Hydrated Vanadium Dioxide/Graphene as a Superior Cathode for Aqueous Zn Batteries

Huang

Qin

et al. 2021

ACS Appl. Mater. Interfaces

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Zinc ion batteries have become a new type of energy storage device because of the low cost and high safety. Among the various cathode materials, vanadium–oxygen compounds stand out due to their high theoretical capacity and variable chemistry valence state. Here, we construct a 3D spongy hydrated vanadium dioxide composite (Od-HVO/rG) with abundant oxygen vacancy defects and graphene modifications. Thanks to the stable structure and abundant active sites, Od-HVO/rG exhibits superior electrochemical properties. In aqueous electrolyte, the Od-HVO/rG cathode provides high initial charging capacity (428.6 mAh/g at 0.1 A/g), impressive rate performance (186 mAh/g even at 20 A/g), and cycling stability, which can still maintain 197.5 mAh/g after 2000 cycles at 10 A/g. Also, the superior specific energy of 245.3 Wh/kg and specific power of 14142.7 W/kg are achieved. In addition, MXene/Od-HVO/rG cathode materials are prepared and PAM/ZnSO4 hydrogel electrolytes are applied to assemble flexible soft pack quasi-solid-state zinc ion batteries, which also exhibit excellent flexibility and cycling stability (206.6 mAh/g after 2000 cycles). This work lays the foundation for advances in rechargeable aqueous zinc ion batteries, while revealing the potential for practical applications of flexible energy storage devices.

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Section: Analysis and Discussionmentioning

confidence: 84%

Oxygen Defect Hydrated Vanadium Dioxide/Graphene as a Superior Cathode for Aqueous Zn Batteries

Huang

Qin

et al. 2021

ACS Appl. Mater. Interfaces

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“…And Mo-doped Na 3 V 2 (PO 4 ) 3 @C for Na-ion batteries delivers rapid electronic/ionic transport, which significantly accelerates ion-diffusion kinetics . Mo-doped NH 4 V 4 O 10 as a cathode material in Zn-ion batteries is able to demonstrate superior capacity retention . The above research work exposed Mo as one of the most advisable candidates for cationic doping.…”

Section: Introductionmentioning

confidence: 91%

“…31 Mo-doped NH 4 V 4 O 10 as a cathode material in Zn-ion batteries is able to demonstrate superior capacity retention. 32 The above research work exposed Mo as one of the most advisable candidates for cationic doping. In addition, Mo is a well-known multivalent element, which not only has a similar ionic radius to V but also displays a close redox potential to V; 33 therefore, Mo could be considered as a potential dopant for VS 4 .…”

Section: Introductionmentioning

confidence: 99%

Synergy Strategy of Electrical Conductivity Enhancement and Vacancy Introduction for Improving the Performance of VS₄ Magnesium-Ion Battery Cathode

Ding

Dai

Tian

et al. 2021

ACS Appl. Mater. Interfaces

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The development of cathode materials with a high electric conductivity and a low polarization effect is crucial for enhancing the electrochemical properties of magnesium-ion batteries (MIBs). Herein, Mo doping and nitrogen-doped tubular graphene (N-TG) introduction are carried out for decorating VS4 (Mo-VS4/N-TG) via the one-step hydrothermal method as a freestanding cathode for MIBs. The results of characterizations and density functional theory (DFT) reveal that rich sulfur vacancies are induced by Mo doping, and N-TG as a high conductive skeleton material serves to disperse the active material and forms a tight connection, all of which collectively improved the electrical conductivity of electrode and increased the adsorption energy of Mg2+ (−6.341 eV). Furthermore, the fast reaction kinetics is also confirmed by the galvanostatic intermittent titration technique (GITT) and the pesudocapacitance-like contribution analysis. Benefiting from the synergistic effect of electrical conductivity enhancement and rich vacancy introduction, Mo-VS4/N-TG delivers a steady Mg2+ storage specific capacity of about 140 mAh g–1 at 50 mA g–1, outstanding cycle stability (80.6% capacity retention ratio after 1200 cycles under 500 mA g–1), and excellent rate capability (specific capacity reaches 77.1 mAh g–1 when the current density reaches 500 mA g–1). In addition, the reversible reaction process, intercalation mechanism, and structural stability during the Mg2+ insertion/extraction process are confirmed by a series of ex situ characterizations. This research provides a sustainable and scalable strategy to spur the development of MIBs.

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“…Overall, the present study focuses on the presentation of a layered-type NH 4 V 4 O 10 cathode with flower-like morphology prepared by a microwave reaction that lasts for a very short duration of~0.5 h for useful ARZIB applications. This NHVO cathode prepared under short microwave irradiation presents competent or even more impressive electrochemical properties in terms of higher specific capacity and long-term cycling stability than some of the reported counterparts synthesized by the hydrothermal method using a relatively long reaction duration (see Table 1 for comparison) [32,[49][50][51][52]. Thus, the present microwave NHVO cathode demonstrates notable zinc storage properties and structural stability for electrochemical reversibility under long-term cycling.…”

Section: Resultsmentioning

confidence: 73%

Microwave-Assisted Rapid Synthesis of NH4V4O10 Layered Oxide: A High Energy Cathode for Aqueous Rechargeable Zinc Ion Batteries

et al. 2021

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Aqueous rechargeable zinc ion batteries (ARZIBs) have gained wide interest in recent years as prospective high power and high energy devices to meet the ever-rising commercial needs for large-scale eco-friendly energy storage applications. The advancement in the development of electrodes, especially cathodes for ARZIB, is faced with hurdles related to the shortage of host materials that support divalent zinc storage. Even the existing materials, mostly based on transition metal compounds, have limitations of poor electrochemical stability, low specific capacity, and hence apparently low specific energies. Herein, NH4V4O10 (NHVO), a layered oxide electrode material with a uniquely mixed morphology of plate and belt-like particles is synthesized by a microwave method utilizing a short reaction time (~ 0.5 h) for use as a high energy cathode for ARZIB applications. The remarkable electrochemical reversibility of Zn2+/H+ intercalation in this layered electrode contributes to impressive specific capacity (417 mAh g−1 at 0.25 A g−1) and high rate performance (170 mAh g−1 at 6.4 A g−1) with almost 100% Coulombic efficiencies. Further, a very high specific energy of 306 Wh Kg−1 at a specific power of 72 W Kg−1 was achieved by the ARZIB using the present NHVO cathode. The present study thus facilitates the opportunity for developing high energy ARZIB electrodes even under short reaction time to explore potential materials for safe and sustainable green energy storage devices.

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Mo-doped NH4V4O10 with enhanced electrochemical performance in aqueous Zn-ion batteries

Cited by 33 publications

References 54 publications

Oxygen Defect Hydrated Vanadium Dioxide/Graphene as a Superior Cathode for Aqueous Zn Batteries

Oxygen Defect Hydrated Vanadium Dioxide/Graphene as a Superior Cathode for Aqueous Zn Batteries

Synergy Strategy of Electrical Conductivity Enhancement and Vacancy Introduction for Improving the Performance of VS₄ Magnesium-Ion Battery Cathode

Microwave-Assisted Rapid Synthesis of NH4V4O10 Layered Oxide: A High Energy Cathode for Aqueous Rechargeable Zinc Ion Batteries

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Mo-doped NH4V4O10 with enhanced electrochemical performance in aqueous Zn-ion batteries

Cited by 33 publications

References 54 publications

Oxygen Defect Hydrated Vanadium Dioxide/Graphene as a Superior Cathode for Aqueous Zn Batteries

Oxygen Defect Hydrated Vanadium Dioxide/Graphene as a Superior Cathode for Aqueous Zn Batteries

Synergy Strategy of Electrical Conductivity Enhancement and Vacancy Introduction for Improving the Performance of VS4 Magnesium-Ion Battery Cathode

Microwave-Assisted Rapid Synthesis of NH4V4O10 Layered Oxide: A High Energy Cathode for Aqueous Rechargeable Zinc Ion Batteries

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Synergy Strategy of Electrical Conductivity Enhancement and Vacancy Introduction for Improving the Performance of VS₄ Magnesium-Ion Battery Cathode