Cobalt phosphide microsphere as an efficient bifunctional oxygen catalyst for Li-air batteries

Zhang, Feng; Wei, Minghui; Sui, Jing; Jin, Chao; Luo, Yong; Bie, Shiyu; Yang, Ruizhi

doi:10.1016/j.jallcom.2018.04.070

Cited by 36 publications

(25 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Whereas the value for the Co 2 P/CNT electrode falls sharply to 45.3%. To be best of our knowledge, this is the best capacity retention performance that has been reported so far and the comparison of capacity retention performance between this work and some reported catalytic cathodes for the aprotic LOBs has been given in Table S1 in the Supporting Information …”

Section: Resultsmentioning

confidence: 78%

“…[30][31][32] However, the catalytic activity regarding ORR and OER of transition metal phosphides in aprotic LOBs has been less studied and the reported electrocatalytic performance needs to be ameliorated. [33,34] On the other hand, the majority of the reported routes to fabricate Co 2 P nanoparticles involve the use of toxic alkylphosphine and PH 3 release. Hence, it would be quite interesting to investigate the ORR/OER catalytic efficacy of Co 2 P in LOBs synthesized by a rational protocol free of toxic.Particularly, the advantages of low cost and outstanding electronic conductivity make carbonaceous materials possess great potential for preferable cathode catalysts.…”

mentioning

confidence: 99%

See 1 more Smart Citation

One‐Step Route Synthesized Co₂P/Ru/N‐Doped Carbon Nanotube Hybrids as Bifunctional Electrocatalysts for High‐Performance Li–O₂ Batteries

Wang

Dong

et al. 2019

Small

View full text Add to dashboard Cite

The large‐scale commercial application of lithium–oxygen batteries (LOBs) is overwhelmed by the sluggish kinetics of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) associated with insoluble and insulated Li2O2. Herein, an elaborate design on a highly catalytic LOBs cathode constructed by N‐doped carbon nanotubes (CNT) with in situ encapsulated Co2P and Ru nanoparticles is reported. The homogeneously dispersed Co2P and Ru catalysts can effectively modulate the formation and decomposition behavior of Li2O2 during discharge/charge processes, ameliorating the electronically insulating property of Li2O2 and constructing a homogenous low‐impedance Li2O2/catalyst interface. Compared with Co/CNT and Ru/CNT electrodes, the Co2P/Ru/CNT electrode delivers much higher oxygen reduction triggering onset potential and higher ORR and OER peak current and integral areas, showing greatly improved ORR/OER kinetics due to the synergistic effects of Co2P and Ru. Li–O2 cells based on the Ru/Co2P/CNT electrode demonstrate improved ORR/OER overpotential of 0.75 V, excellent rate capability of 12 800 mAh g−1 at 1 A g−1, and superior cycle stability for more than 185 cycles under a restricted capacity of 1000 mAh g−1 at 100 mA g−1. This work paves an exciting avenue for the design and construction of bifunctional catalytic cathodes by coupling metal phosphides with other active components in LOBs.

show abstract

Section: Resultsmentioning

confidence: 78%

mentioning

confidence: 99%

One‐Step Route Synthesized Co₂P/Ru/N‐Doped Carbon Nanotube Hybrids as Bifunctional Electrocatalysts for High‐Performance Li–O₂ Batteries

Wang

Dong

et al. 2019

Small

View full text Add to dashboard Cite

show abstract

“…Thus, the combined XPS and XRD studies suggest that the major dopant in FeP-I sample might be a phosphate (typically Fe 2 P 2 O 7 ), which is usually formed at a temperature higher than 180°C. [47] As shown in Figure 2d, the ultrathin FeP-I NS displays a typical type-IV absorption-desorption isotherm, indicative of their mesoporous characteristics. The calculated pore size distribution (inset 2d) suggests that the pore volume of FeP-I NS is mainly contributed by mesopores (with the size of 2-50 nm), fully consistent with the TEM observations.…”

Section: Resultsmentioning

confidence: 87%

“…72‐1516 with a =5.517, b =5.255, c =4.488 Å, α =98.73, β =98.33, γ =103.81°). Thus, the combined XPS and XRD studies suggest that the major dopant in FeP‐I sample might be a phosphate (typically Fe 2 P 2 O 7 ), which is usually formed at a temperature higher than 180 °C …”

Section: Resultsmentioning

confidence: 99%

Phosphate Doped Ultrathin FeP Nanosheets as Efficient Electrocatalysts for the Hydrogen Evolution Reaction in Acid Media

Jing

Yang

et al. 2019

ChemCatChem

View full text Add to dashboard Cite

Ultrathin nanosheets of non‐layered materials have attracted intensive interests due to their abundantly accessible active sites. Herein, we demonstrate that the ultrathin FeP nanosheets (FeP‐I NS) with abundant mesoporosity and phosphate dopants can be facilely synthesized using ultrathin γ‐Fe2O3 NS as precursors. The as‐prepared catalyst displays good HER catalytic activity with an low overpotential (η) of 95/160 mV at the current densities of 10/100 mA cm−2 and small Tafel slope of 41 mV dec−1 as well as good stability during a period of 24 h in acid media. Additional experimental results reveal that the unique structural features of FeP‐I NS (i. e., ultrathin morphology, abundant mesoporosity, local structural distortion and amorphous domains) are key factors for achieving good HER activity. The computational studies demonstrate that the phosphate dopants (i. e., Fe2P2O7) contribute to the superior catalytic performance of FeP by reducing the Gibbs free energy of intermediate H* adsorption (ΔGH*) to the catalyst surface as well as by tailoring the electronic properties of the catalyst.

show abstract

“…Meanwhile, as shown in Figure (b), the peaks at 130.4 and 132.9 eV are ascribed to the binding energies of P 2p3/2 and P 2p1/2 in SnPx, respectively. The peak at 134.3 eV could be assigned to P−O bond, which is associated with some unavoidable surface oxidation on the Sn 4 P 3 surface . The C 1s XPS spectra could be divided into three components (Figure (c)), the peak at 284.7 eV corresponds to graphenic carbon atoms, the peak located at 286.1 eV is assigned to C−N bond, while, a weak peak at 287.7 eV is associated with C−O bond .…”

Section: Resultsmentioning

confidence: 99%

PPy‐Derived Sandwich‐Structured Hollow Carbon Fiber Anchoring Sn₄P₃ as Anode Materials with Improved Na⁺ Storage

Wei

Wang

et al. 2019

ChemNanoMat

Self Cite

View full text Add to dashboard Cite

Sn4P3 has been considered as one of the promising anode materials for sodium ion batteries (SIBs) due to its high reversible capacity and low redox potential. However, the large volume expansion and Sn aggregation during the sodiation‐desodiation process result in the poor cycle stability, limiting its commercial use. Herein, a sandwich‐structured hollow carbon fiber anchoring Sn4P3 quantum dots (C@Sn4P3@HCF) is synthesized by carbon coating, carbonization/reduction and phosphorization with PPy hollow fiber as a template. Benefitting from the unique sandwiched architecture as well as the synergistic effect between Sn4P3 and N‐doped hollow carbon fiber, C@Sn4P3@HCF hybrids deliver a high initial discharge capacity of 631 mAh g−1 at 100 mA g−1, excellent rate capability (205 mAh g−1 at 50 mA g−1, 108 mAh g−1 at 1500 mA g−1) and ultrastable capacity retention of >103 mAh g−1 with a coulombic efficiency of 99.4% over 1000 cycles at 300 mA g−1. Hence, C@Sn4P3@HCF hybrids show great potential as an alternative anode material for next‐generation SIBs.

show abstract

Cobalt phosphide microsphere as an efficient bifunctional oxygen catalyst for Li-air batteries

Cited by 36 publications

References 19 publications

One‐Step Route Synthesized Co₂P/Ru/N‐Doped Carbon Nanotube Hybrids as Bifunctional Electrocatalysts for High‐Performance Li–O₂ Batteries

One‐Step Route Synthesized Co₂P/Ru/N‐Doped Carbon Nanotube Hybrids as Bifunctional Electrocatalysts for High‐Performance Li–O₂ Batteries

Phosphate Doped Ultrathin FeP Nanosheets as Efficient Electrocatalysts for the Hydrogen Evolution Reaction in Acid Media

PPy‐Derived Sandwich‐Structured Hollow Carbon Fiber Anchoring Sn₄P₃ as Anode Materials with Improved Na⁺ Storage

Contact Info

Product

Resources

About

Cobalt phosphide microsphere as an efficient bifunctional oxygen catalyst for Li-air batteries

Cited by 36 publications

References 19 publications

One‐Step Route Synthesized Co2P/Ru/N‐Doped Carbon Nanotube Hybrids as Bifunctional Electrocatalysts for High‐Performance Li–O2 Batteries

One‐Step Route Synthesized Co2P/Ru/N‐Doped Carbon Nanotube Hybrids as Bifunctional Electrocatalysts for High‐Performance Li–O2 Batteries

Phosphate Doped Ultrathin FeP Nanosheets as Efficient Electrocatalysts for the Hydrogen Evolution Reaction in Acid Media

PPy‐Derived Sandwich‐Structured Hollow Carbon Fiber Anchoring Sn4P3 as Anode Materials with Improved Na+ Storage

Contact Info

Product

Resources

About

One‐Step Route Synthesized Co₂P/Ru/N‐Doped Carbon Nanotube Hybrids as Bifunctional Electrocatalysts for High‐Performance Li–O₂ Batteries

One‐Step Route Synthesized Co₂P/Ru/N‐Doped Carbon Nanotube Hybrids as Bifunctional Electrocatalysts for High‐Performance Li–O₂ Batteries

PPy‐Derived Sandwich‐Structured Hollow Carbon Fiber Anchoring Sn₄P₃ as Anode Materials with Improved Na⁺ Storage