MoSe2@CNT Core–Shell Nanostructures as Grain Promoters Featuring a Direct Li2O2 Formation/Decomposition Catalytic Capability in Lithium‐Oxygen Batteries

He, Biao; Li, Gaoyang; Li, Jiajia; Wang, Jun; Tong, Hui; Yang, Fan; Wang, Weiliang; Sun, Shuhui; Dang, Feng

doi:10.1002/aenm.202003263

Cited by 84 publications

(47 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…DFT calculation was also conducted to study the intrinsic information of thin film catalysts at the atomic scale for Li-O 2 batteries. Three elementary reactions and three intermediates and terminal products (LiO 2 , Li 2 O 2 and Li 2 O) were chosen for theoretical calculation: i [67,68] The symbol of * indicates that the species are absorbed on the surface of the catalysts. A phase diagram of different discharge products and intermediates was found to analyze the possible discharge processes on Pd (111)/Ni (111) heterostructure (Figure S20, Supporting Information).…”

Section: Theoretical Analysis Of the High Performancementioning

confidence: 99%

Atomic Heterointerface Boosts the Catalytic Activity toward Oxygen Reduction/Evolution Reaction

Yang

Yin

et al. 2021

Advanced Energy Materials

View full text Add to dashboard Cite

Representatively, the ORR/ OER delivers the discharge/charge process of both aqueous Zn-air batteries and aprotic Li-air batteries which are promising power source candidates for prevailing portable devices and electric vehicles. [7][8][9][10][11][12][13][14] However, the sluggish kinetics of molecular oxygen electrocatalytic reduction and evolution lead to high overpotentials, poor rate capability and short cycle life, severely hampering the widespread implementation of these systems. [15][16][17] Exploring efficient and stable electrocatalysts for ORR/OER is crucial to overcome these issues. [18,19] Currently, there exist difficulties to find a favorable electrocatalyst to stimulate both reactions because elegant OER catalysts usually exhibit poor catalytic activity toward ORR and vice versa.The representative examples are single atoms catalysts (SACs) and layered double hydroxides (LDHs). [20][21][22] There has been significant progress on SACs and LDHs with successfully exploration of various catalysts, such as MnNC, [23] Fe SAs/NC, [24] CoAl LDH, [25] and CoNiFe LDH, [26,27] etc.; however, SACs and LDHs exhibit dedicated catalytic activity toward ORR and OER, respectively. Take the noble metal catalysts for another example, Ru and Ir based materials are prominent OER catalysts while poor for ORR. Oppositely, Pt based materials are elegant toward ORR but poor for OER. Interface engineering is an efficient strategy to enhance the electrocatalytic activity of hybrid materials by taking advantage of the synergistic effect of double or even multiple active sites. Here, the rational design of a Pd/NiO atomic interface with well patterned Pd arrays imbedded into NiO thin films are reported to boost the catalytic activity toward the oxygen reduction/ evolution reaction. Theoretical analysis elucidates that the Pd (111)/NiO (111) interface with minimized lattice mismatch effectively adsorbs intermediates (OH * , LiO 2 * , Li 2 O 2 * , and Li 2 O * ) and induces the growth/decomposition of electrochemical reaction products, which greatly lowers the Gibbs energy barrier of crucial steps and boosts the reaction kinetics. As expected, such hybrid thin films exhibit high catalytic activity for both the oxygen reduction reaction and oxygen evolution reaction, with performance comparable to the benchmarked Pt/C and RuO 2 catalysts. Moreover, favorable performance is also achieved in both aqueous Zn-air batteries and aprotic Li-air batteries with an overpotential of only 0.69 and 0.50 V, respectively. This work suggests the great potential of such particularly morphological hybrid thin films in the development of high-performance catalysts for energy storage and conversion.

show abstract

Section: Theoretical Analysis Of the High Performancementioning

confidence: 99%

Atomic Heterointerface Boosts the Catalytic Activity toward Oxygen Reduction/Evolution Reaction

Yang

Yin

et al. 2021

Advanced Energy Materials

View full text Add to dashboard Cite

show abstract

“…Theoretically, when the degree of lattice mismatch is less than 5%, this indicates complete coherency according to the definition. [41] These results also show that the highest reaction kinetics exists in the regions of the heterojunction interfaces between MoS 2 and CoS 2 , which is highly conducive to the heteroepitaxial growth of Li 2 O 2 . [42] HRTEM observation was carried out to further understand the heteroepitaxial growth of discharge products, and Figure 5a shows that the film like 5d.…”

Section: Resultsmentioning

confidence: 76%

CoS₂ Nanoparticles Anchored on MoS₂ Nanorods As a Superior Bifunctional Electrocatalyst Boosting Li₂O₂ Heteroepitaxial Growth for Rechargeable Li‐O₂ Batteries

Zhao

Xia

et al. 2021

Small

Self Cite

View full text Add to dashboard Cite

and the oxygen evolution reaction (OER) during the discharge/charge processes. [2] It is evident that an efficient catalyst can not only accelerate the lagging reaction kinetics, but also can avoid side reactions to deliver long-term stability. Therefore, exploring ideal catalysts plays a pivotal role in promoting the development of LOBs and is an urgent necessity. [3] Recently, noble metals and their alloys have exhibited excellent electrocatalytic activities toward the OER and ORR, but the high cost and scarcity of these electrocatalysts have seriously limited their commercial application. [4] Transition metal dichalcogenides (TMDs) have been attracting extensive attention worldwide on account of their low cost, excellent chemically active electrocatalytic property, and diversity of structure, so they have realized numerous applications in energy conversion and storage, including hydrogen evolution, batteries, and supercapacitors. [5] MoS 2 has become the most outstanding choice and has been widely applied in various fields due to its excellent catalytic activity. [6] Its application in the ORR/OER has been limited, however, by its low electrical conductivity and limited number of active sites. To this end, various feasible tactics have been employed to promote the electrochemical performance of MoS 2 in LOBs, such as combining with conductive Developing an excellent bifunctional catalyst is essential for the commercial application of Li-O 2 batteries. Heterostructures exhibit great application potential in the field of energy catalysis because of the accelerated charge transfer and increased active sites on their surfaces. In this work, CoS 2 nanoparticles decorated on MoS 2 nanorods are constructed and act as a superior cathode catalyst for Li-O 2 batteries. Coupling MoS 2 and CoS 2 can not only synergistically enhance their electrical conductivity and electrochemical activity, but also promote the heteroepitaxial growth of discharge products on the heterojunction interfaces, thus delivering high discharge capacity, stable cycle performance, and good rate capability.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/smll.202105752.

show abstract

“…2 b) showed three different peaks of Se 3d 5/2 , Se 3d 3/2 , and selenite. The first two peaks were attributed to iron selenides, and the other one was owing to the partial oxidation of 3D FeSe x @C/MB [ 32 , 33 ]. The Ti 2p spectrum (Fig.…”

Section: Resultsmentioning

confidence: 99%

Carbon-Coated Three-Dimensional MXene/Iron Selenide Ball with Core–Shell Structure for High-Performance Potassium-Ion Batteries

et al. 2021

View full text Add to dashboard Cite

Two-dimensional (2D) MXenes are promising as electrode materials for energy storage, owing to their high electronic conductivity and low diffusion barrier. Unfortunately, similar to most 2D materials, MXene nanosheets easily restack during the electrode preparation, which degrades the electrochemical performance of MXene-based materials. A novel synthetic strategy is proposed for converting MXene into restacking-inhibited three-dimensional (3D) balls coated with iron selenides and carbon. This strategy involves the preparation of Fe2O3@carbon/MXene microspheres via a facile ultrasonic spray pyrolysis and subsequent selenization process. Such 3D structuring effectively prevents interlayer restacking, increases the surface area, and accelerates ion transport, while maintaining the attractive properties of MXene. Furthermore, combining iron selenides and carbon with 3D MXene balls offers many more sites for ion storage and enhances the structural robustness of the composite balls. The resultant 3D structured microspheres exhibit a high reversible capacity of 410 mAh g−1 after 200 cycles at 0.1 A g−1 in potassium-ion batteries, corresponding to the capacity retention of 97% as calculated based on 100 cycles. Even at a high current density of 5.0 A g−1, the composite exhibits a discharge capacity of 169 mAh g−1.

show abstract

MoSe₂@CNT Core–Shell Nanostructures as Grain Promoters Featuring a Direct Li₂O₂ Formation/Decomposition Catalytic Capability in Lithium‐Oxygen Batteries

Cited by 84 publications

References 44 publications

Atomic Heterointerface Boosts the Catalytic Activity toward Oxygen Reduction/Evolution Reaction

Atomic Heterointerface Boosts the Catalytic Activity toward Oxygen Reduction/Evolution Reaction

CoS₂ Nanoparticles Anchored on MoS₂ Nanorods As a Superior Bifunctional Electrocatalyst Boosting Li₂O₂ Heteroepitaxial Growth for Rechargeable Li‐O₂ Batteries

Carbon-Coated Three-Dimensional MXene/Iron Selenide Ball with Core–Shell Structure for High-Performance Potassium-Ion Batteries

Contact Info

Product

Resources

About

MoSe2@CNT Core–Shell Nanostructures as Grain Promoters Featuring a Direct Li2O2 Formation/Decomposition Catalytic Capability in Lithium‐Oxygen Batteries

Cited by 84 publications

References 44 publications

Atomic Heterointerface Boosts the Catalytic Activity toward Oxygen Reduction/Evolution Reaction

Atomic Heterointerface Boosts the Catalytic Activity toward Oxygen Reduction/Evolution Reaction

CoS2 Nanoparticles Anchored on MoS2 Nanorods As a Superior Bifunctional Electrocatalyst Boosting Li2O2 Heteroepitaxial Growth for Rechargeable Li‐O2 Batteries

Carbon-Coated Three-Dimensional MXene/Iron Selenide Ball with Core–Shell Structure for High-Performance Potassium-Ion Batteries

Contact Info

Product

Resources

About

MoSe₂@CNT Core–Shell Nanostructures as Grain Promoters Featuring a Direct Li₂O₂ Formation/Decomposition Catalytic Capability in Lithium‐Oxygen Batteries

CoS₂ Nanoparticles Anchored on MoS₂ Nanorods As a Superior Bifunctional Electrocatalyst Boosting Li₂O₂ Heteroepitaxial Growth for Rechargeable Li‐O₂ Batteries