Boosting potassium-ion storage in large-diameter carbon nanotubes/MoP hybrid

Wang, Zhide; Gao, Weikang; Ding, Chenjie; Qi, Haoyu; Kang, Shifei; Cui, Lifeng

doi:10.1016/j.jcis.2020.10.019

Cited by 20 publications

(13 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, the presence of pyridinic nitrogen and pyrrolic nitrogen usually helps to form more defects and active centers inside the materials, which can effectively enhance the reversibility of the electrode. 35,49 For the Mo 3d spectra (Figure 2c), the peaks around 229.32 and 232.1 eV can be assigned to the Mo 2+ species of MoP, 50 which agrees with the above XRD and HRTEM observations, and the peaks at 236.52 and 233.46 eV correspond to 3d 3/2 and 3d 5/2 of Mo(VI) in MoO 3 , 51,52 respectively. The peaks at 235.35 and 232.5 eV coincide with 3d 3/2 and 3d 5/2 of Mo(IV) in MoO 2 , 45,50,52,53 respectively.…”

Section: ■ Results and Discussionsupporting

confidence: 75%

MoP Quantum Dot-Modified N,P-Carbon Nanotubes as a Multifunctional Separator Coating for High-Performance Lithium–Sulfur Batteries

Zhang

Cheng

Chen

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Lithium−sulfur batteries (LSBs) have the advantages of high energy density and low cost and are considered promising next-generation energy storage systems, but the shuttle effect and slow sulfur redox kinetics severely limit their practical applications. Herein, MoP quantum dot-modified N,P-doped hollow PPy substrates are adopted as separator modification coatings for LSBs. The MoP quantum dots exhibit excellent chemisorption and catalytic conversion capabilities for polysulfides, while the N,P-doped PPy substrates can provide flexible channels for Li + /electron transport and act as a physical barrier to suppress the shuttle effect. As a result, LSBs assembled with modified separators exhibit excellent rate capability (739 mAh/g at 3 C) and cycle performance (600 mAh/g at 1 C after 600 cycles, 0.052% decay per cycle). Moreover, even under a high sulfur loading of 3.68 mg/cm 2 , areal capacities of 3.58 and 2.92 mAh/cm 2 for the 1st cycle and 110th cycle are achieved. In addition, according to density functional theory calculations, MoP quantum dots have large adsorption energy for S 8 and Li 2 S n , which further confirms the possibility of lowering the initial nucleation energy barrier of Li 2 S and helps to improve the kinetics of the subsequent Li 2 S reaction. This study proposes a novel method for using transitionmetal phosphides as catalysts in high-performance LSBs.

show abstract

Section: ■ Results and Discussionsupporting

confidence: 75%

MoP Quantum Dot-Modified N,P-Carbon Nanotubes as a Multifunctional Separator Coating for High-Performance Lithium–Sulfur Batteries

Zhang

Cheng

Chen

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…This indicates that a greater degree of defects is mainly created by the presence of extrinsic dopants, which is suitable for the KIB systems as it would allow excitation to the conduction band and thereby enhance the electronic conductivity of the MoSe 2 -containing materials, which is of great significance as it would contribute to improving their electrocatalytic performance. 34 To further characterize the structure of the fabricated N-HCNS, MoSe 2 /N-HCNS and MoSe 2 /NP-HCNS, the relevant specific surface area and the porosity of these materials are determined based on N 2 adsorption−desorption isotherms and Brunauer−Emmett− Teller (BET) analysis (Figure 1c). More specifically, the N 2 adsorption−desorption isotherms of these samples exhibit the characteristic type-IV isotherms but have the unclosed hysteresis loops and a saturated adsorption platform, which are induced by the strong adsorption capacity and the existence of numerous interconnected cage-like mesoporous structures with a uniform pore size distribution on them.…”

Section: Resultsmentioning

confidence: 99%

“…It is also noteworthy that the I D / I G value is calculated to be as high as about 1.30, larger than the corresponding values of MoSe 2 /N-HCNS (1.11) and N-HCNS (1.04). This indicates that a greater degree of defects is mainly created by the presence of extrinsic dopants, which is suitable for the KIB systems as it would allow excitation to the conduction band and thereby enhance the electronic conductivity of the MoSe 2 -containing materials, which is of great significance as it would contribute to improving their electrocatalytic performance . To further characterize the structure of the fabricated N-HCNS, MoSe 2 /N-HCNS and MoSe 2 /NP-HCNS, the relevant specific surface area and the porosity of these materials are determined based on N 2 adsorption–desorption isotherms and Brunauer–Emmett–Teller (BET) analysis (Figure c).…”

Section: Resultsmentioning

confidence: 99%

N, P Codoped Hollow Carbon Nanospheres Decorated with MoSe₂ Ultrathin Nanosheets for Efficient Potassium-Ion Storage

Cui

Wang

Kang

et al. 2022

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

Potassium-ion batteries (KIBs) are gradually being considered as an alternative for lithium-ion batteries because of their non-negligible advantages such as abundance and low expenditure of K, as well as higher electrochemical potential than another alternativesodium-ion batteries. Nevertheless, when the electrode materials are inserted and extracted with large-sized K + ions, the tremendous volume change will cause the collapse of the microstructures of electrodes and make the charging/discharging process irreversible, thus disapproving their extended application. In response to this, we put forward a feasible strategy to realize the in situ assembly of layered MoSe 2 nanosheets onto N, P codoped hollow carbon nanospheres (MoSe 2 / NP-HCNSs) through thermal annealing and heteroatom doping strategies, and the resulting nanoengineered material can function well as an anode for KIBs. This cleverly designed nanostructure of MoSe 2 /NP-HCNS can broaden the interlayer spacing of MoSe 2 to boost the efficiency of the insertion/extraction of K ions and also can accommodate large volume change-caused mechanical strain, facilitate electrolyte penetration, and prevent the aggregation of MoSe 2 nanosheets. This synthetic method generates abundant defects to increase the amounts of active sites, as well as conductivity. The hierarchical nanostructure can effectively increase the proportion of pseudo-capacitance and promote interfacial electronic transfer and K + diffusion, thus imparting great electrochemical performance. The MoSe 2 /NP-HCNS anode exhibits a high reversible capacity of 239.9 mA h g −1 at 0.1 A g −1 after 200 cycles and an ultralong cycling life of 161.1 mA h g −1 at 1 A g −1 for a long period of 1000 cycles. This nanoengineering method opens up new insights into the development of promising anode materials for KIBs.

show abstract

“…prepared ultrasmall MoP nanoparticles within N/P‐co‐doped hollow CNTs. [ 216 ] Electrochemical testing revealed a high specific discharge capacity of 255 mAh g −1 after 120 cycles at 1.0 A g −1 .…”

Section: Phosphorus‐ and Phosphide‐based Materials For Pibsmentioning

confidence: 99%

Phosphorus/Phosphide‐Based Materials for Alkali Metal‐Ion Batteries

Chen

Wang

et al. 2022

Advanced Science

View full text Add to dashboard Cite

Phosphorus‐ and phosphide‐based materials with remarkable physicochemical properties and low costs have attracted significant attention as the anodes of alkali metal (e.g., Li, Na, K, Mg, Ca)‐ion batteries (AIBs). However, the low electrical conductivity and large volume expansion of these materials during electrochemical reactions inhibit their practical applications. To solve these problems, various promising solutions have been explored and utilized. In this review, the recent progress in AIBs using phosphorus‐ and phosphide‐based materials is summarized. Thereafter, the in‐depth working principles of diverse AIBs are discussed and predicted. Representative works with design concepts, construction approaches, engineering strategies, special functions, and electrochemical results are listed and discussed in detail. Finally, the existing challenges and issues are concluded and analyzed, and future perspectives and research directions are given. This review can provide new guidance for the future design and practical applications of phosphorus‐ and phosphide‐based materials used in AIBs.

show abstract

Boosting potassium-ion storage in large-diameter carbon nanotubes/MoP hybrid

Cited by 20 publications

References 73 publications

MoP Quantum Dot-Modified N,P-Carbon Nanotubes as a Multifunctional Separator Coating for High-Performance Lithium–Sulfur Batteries

MoP Quantum Dot-Modified N,P-Carbon Nanotubes as a Multifunctional Separator Coating for High-Performance Lithium–Sulfur Batteries

N, P Codoped Hollow Carbon Nanospheres Decorated with MoSe₂ Ultrathin Nanosheets for Efficient Potassium-Ion Storage

Phosphorus/Phosphide‐Based Materials for Alkali Metal‐Ion Batteries

Contact Info

Product

Resources

About

Boosting potassium-ion storage in large-diameter carbon nanotubes/MoP hybrid

Cited by 20 publications

References 73 publications

MoP Quantum Dot-Modified N,P-Carbon Nanotubes as a Multifunctional Separator Coating for High-Performance Lithium–Sulfur Batteries

MoP Quantum Dot-Modified N,P-Carbon Nanotubes as a Multifunctional Separator Coating for High-Performance Lithium–Sulfur Batteries

N, P Codoped Hollow Carbon Nanospheres Decorated with MoSe2 Ultrathin Nanosheets for Efficient Potassium-Ion Storage

Phosphorus/Phosphide‐Based Materials for Alkali Metal‐Ion Batteries

Contact Info

Product

Resources

About

N, P Codoped Hollow Carbon Nanospheres Decorated with MoSe₂ Ultrathin Nanosheets for Efficient Potassium-Ion Storage