Ultrafast lithium energy storage enabled by interfacial construction of interlayer-expanded MoS<sub>2</sub>/N-doped carbon nanowires

Sun, Huanhuan; Wang, Jian‐Gan; Zhang, Yu; Hua, Wei; Li, Yueying; Liu, Huanyan

doi:10.1039/c8ta04852e

Cited by 87 publications

(36 citation statements)

References 48 publications

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“…Developing nonprecious metal catalysts with increased activity and durability is crucial to advance solid‐state electrocatalysis for sustainable energy technologies that mainly rely on precious metals such as platinum (Pt), palladium (Pd), and silver (Ag) . Recently, 2D nanomaterials such as molybdenum disulfide (MoS 2 ) and carbide (Mo 2 C) have been identified as promising candidates to replace precious metal catalysts owing to the unique electronic properties of their edge structures . However, the basal plane of these catalysts containing substantial amount of their surface structure remains nearly inactive making these catalysts inefficient, especially for practical applications .…”

Section: Introductionmentioning

confidence: 99%

Identifying Catalytic Active Sites of Trimolybdenum Phosphide (Mo₃P) for Electrochemical Hydrogen Evolution

Kondori

Esmaeilirad

Baskin

et al. 2019

Advanced Energy Materials

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candidates to replace precious metal catalysts owing to the unique electronic properties of their edge structures. [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] However, the basal plane of these catalysts containing substantial amount of their surface structure remains nearly inactive making these catalysts inefficient, especially for practical applications. [26][27][28][29] Therefore, designing and developing a new class of nonprecious metal catalysts with an increased intrinsic activity that concurrently hold a high number of active sites still remain as a challenging task in the field of electrocatalysis.Here, we have found nanostructured trimolybdenum phosphide (Mo 3 P) as a novel material for solid-state electrocatalytic reactions owing to its high density of active sites with outstanding electronic properties. We have tested the performance of this catalyst in the electrochemical hydrogen evolution reaction (HER) and compared with Pt, known as the best HER catalyst. Cyclic voltammetry (CV) and in situ differential electrochemical mass spectroscopy (DEMS) results illustrate onset potential of as low as 21 mV that is the closest value to Pt yet reported. [30] The onset potential is also seven, four, and three times lower than other recently developed nonprecious metal catalysts, i.e., MoS 2 , Mo 2 C, and molybdenum phosphide (MoP) nanoflakes (NFs), respectively. [31,32] The turnover frequency (TOF) measurements, actual activity of surface atoms, at 150 mV overpotential also offer 21.5-fold activity improvement for the Mo 3 P catalyst than that of MoS 2 NFs. Atomic-scale characterization Solid-state electrocatalysis plays a crucial role in the development of renewable energy to reshape current and future energy needs. However, finding an inexpensive and highly active catalyst to replace precious metals remains a big challenge for this technology. Here, tri-molybdenum phosphide (Mo 3 P) is found as a promising nonprecious metal and earthabundant candidate with outstanding catalytic properties that can be used for electrocatalytic processes. The catalytic performance of Mo 3 P nanoparticles is tested in the hydrogen evolution reaction (HER). The results indicate an onset potential of as low as 21 mV, H 2 formation rate, and exchange current density of 214.7 µmol s −1 g −1 cat (at only 100 mV overpotential) and 279.07 µA cm −2 , respectively, which are among the closest values yet observed to platinum. Combined atomic-scale characterizations and computational studies confirm that high density of molybdenum (Mo) active sites at the surface with superior intrinsic electronic properties are mainly responsible for the remarkable HER performance. The density functional theory calculation results also confirm that the exceptional performance of Mo 3 P is due to neutral Gibbs free energy (ΔG H *) of the hydrogen (H) adsorption at above 1/2 monolayer (ML) coverage of the (110) surface, exceeding the performance of existing non-noble metal catalysts for HER.

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Section: Introductionmentioning

confidence: 99%

Identifying Catalytic Active Sites of Trimolybdenum Phosphide (Mo₃P) for Electrochemical Hydrogen Evolution

Kondori

Esmaeilirad

Baskin

et al. 2019

Advanced Energy Materials

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“…Lithium-ion batteries (LIBs) have been widely used in consumer electronics due to high energy density, portability, and some other merits [1][2][3][4], whereas their security concerns and high cost restrict their large-scale applications in stationary grid storage and electric vehicles [5,6]. Therefore, much attention has been paid to seek safe, eco-friendly, low-cost, and high-performance battery systems [6,7].…”

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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“…Interesting results have already been published for supercapacitors, 1-15 lithiumion secondary batteries, [16][17][18][19][20][21] and sodium-ion secondary batteries. Supercapacitors and secondary cells are regarded as promising candidates for energy storage and conversion devices.…”

Section: Introductionmentioning

confidence: 99%

“…Supercapacitors and secondary cells are regarded as promising candidates for energy storage and conversion devices. Interesting results have already been published for supercapacitors, [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] lithiumion secondary batteries, [16][17][18][19][20][21] and sodium-ion secondary batteries. 22 Hybrid supercapacitors, however, merge the boundary between the supercapacitors and secondary batteries and possess several advantages over them, including high energy density, high power density, fast charge and discharge speed, and long cycle life.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen ion supercapacitor cell construction and rational design of cell structure

Xie

Zhou

et al. 2019

Int J Energy Res

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Summary A hydrogen ion supercapacitor cell was constructed with an electrochemical double‐layer carbon material as positive electrode and an electrochemical hydrogen storage composite material as negative electrode. The electrochemical performances of both electrodes and hybrid device were investigated by varying of the mass ratio of positive and negative electrode. It was found to be that both electrodes went through the different hydrogen ion storage processes and the capacity of this hybrid supercapacitor was highly correlated with the negative to the positive electrode ratio. The highest capacity was achieved at ratio of 1:7; further increasing of this ratio may downgrade the performance of the hybrid system. With this optimized ratio, the hybrid device demonstrated good electrochemical performance.

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Ultrafast lithium energy storage enabled by interfacial construction of interlayer-expanded MoS₂/N-doped carbon nanowires

Abstract: Edge-oriented and interlayer-expanded MoS2 nanosheets/N-doped carbon nanowires are prepared and exhibit ultrafast and durable Li+ storage performance.

Cited by 87 publications

References 48 publications

Identifying Catalytic Active Sites of Trimolybdenum Phosphide (Mo₃P) for Electrochemical Hydrogen Evolution

Identifying Catalytic Active Sites of Trimolybdenum Phosphide (Mo₃P) for Electrochemical Hydrogen Evolution

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

Hydrogen ion supercapacitor cell construction and rational design of cell structure

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Ultrafast lithium energy storage enabled by interfacial construction of interlayer-expanded MoS2/N-doped carbon nanowires

Abstract: Edge-oriented and interlayer-expanded MoS2 nanosheets/N-doped carbon nanowires are prepared and exhibit ultrafast and durable Li+ storage performance.

Cited by 87 publications

References 48 publications

Identifying Catalytic Active Sites of Trimolybdenum Phosphide (Mo3P) for Electrochemical Hydrogen Evolution

Identifying Catalytic Active Sites of Trimolybdenum Phosphide (Mo3P) for Electrochemical Hydrogen Evolution

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

Hydrogen ion supercapacitor cell construction and rational design of cell structure

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Ultrafast lithium energy storage enabled by interfacial construction of interlayer-expanded MoS₂/N-doped carbon nanowires

Identifying Catalytic Active Sites of Trimolybdenum Phosphide (Mo₃P) for Electrochemical Hydrogen Evolution

Identifying Catalytic Active Sites of Trimolybdenum Phosphide (Mo₃P) for Electrochemical Hydrogen Evolution