Bucket effect on high-performance Li–O<sub>2</sub> batteries based on P-doped 3D NiO microspheres with conformal growth of discharge products

Long, Yuxin; Zhang, Zidong; Zhao, Lanling; Zeng, Qingxi; Li, Qiang; Wang, Jun; Li, Deyuan; Xia, Qing; Liu, Yao; Han, Xue; Zhou, Zhaorui; Li, Yebing; Zhang, Yiming; Chou, Shulei

doi:10.1039/d2ta07061h

Cited by 15 publications

(4 citation statements)

References 80 publications

(106 reference statements)

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“…Figure b shows the Si@MnO@CNFs-2 EIS plots both before and after extended cycling. The breakdown of insulating discharge products and passivated active sites during cycling decreases electron transfer capacity, which is why the Rct value decreases after cycling …”

Section: Resultsmentioning

confidence: 99%

“…The breakdown of insulating discharge products and passivated active sites during cycling decreases electron transfer capacity, which is why the Rct value decreases after cycling. 63 As shown in Figure 7a-h, SEM was utilized to examine the Si electrode and Si@MnO@CNFs-2 electrode changes both before and after 1000 cycles in order to examine the surface morphology and volume changes of the composite anode. The Si electrode surface developed enormous cracks after cycling, shattering into broken pieces (Figure 7b).…”

Section: T H I S C O N T E N T Imentioning

confidence: 99%

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Enhanced Lithium Storage Performance: Dual-Modified Electrospun Si@MnO@CNFs Composites for Advanced Anodes

Zhang,

Jia,

Sun

et al. 2024

ACS Appl. Mater. Interfaces

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Due to its many benefits, including high specific capacity, low voltage plateau, and plentiful supplies, silicon-based anode materials are a strong contender to replace graphite anodes. However, silicon has drawbacks such as poor electrical conductivity, abrupt volume changes during the discharge process, and continuous growth of the solid electrolyte interfacial (SEI) film during cycling, which would cause the electrode capacity to degrade quickly. Coating the silicon's exterior with carbon or metal oxide is a popular method to resolve the above-mentioned problems. In light of those above, the liquid-phase approach and electrostatic spinning technique were used in this work to create Si@MnO@ CNFs bilayer-coated silicon-based anode materials. Because of the well-thoughtout design, MnO and C bilaterally coat the silicon nanoparticles, significantly reducing their volume effect during cycling. Furthermore, manganese oxide has outstanding electrochemical kinetics and an excellent theoretical capacity. The carbon nanofibers' outermost layer increases the material's conductivity and stabilizes the composite material's structure, reducing the volume effect. After 1100 cycles at 2 A g −1 , the composite anode material prepared in this work can still maintain a high capacity of 994.4 mAh g −1 . This study offers an unusual combination of silicon and MnO that might set the way for the application of siliconbased composites in lithium-ion batteries.

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Section: Resultsmentioning

confidence: 99%

Section: T H I S C O N T E N T Imentioning

confidence: 99%

Enhanced Lithium Storage Performance: Dual-Modified Electrospun Si@MnO@CNFs Composites for Advanced Anodes

Zhang,

Jia,

Sun

et al. 2024

ACS Appl. Mater. Interfaces

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“…There were four peaks in the high-resolution Ni 2p spectrum (Figure 2g), wherein the peaks at 856 and 873 eV were assigned to Ni 2p 3/2 and Ni 2p 1/2 of Ni 2+ , respectively, which demonstrated successful doping of Ni atoms. [25] The peaks at 861.9 and 879.3 eV were ascribed to two accompanying satellites, which could be attributed to the formation of antibonding orbitals between Ni and O. [26] The high-resolution Ru 3p and 3d spectra of RuO 2 and Ni-RuO 2 (Figure 2h and Figure S8, Supporting Information) showed the binding energies of Ru 4+ 3p 3/2 for Ni-RuO 2 were negatively shifted (≈0.2 eV) compared with those of RuO 2 .…”

Section: Resultsmentioning

confidence: 99%

Modulating the d‐Band Center of RuO₂ via Ni Incorporation for Efficient and Durable Li–O₂ batteries

Sun,

Cui,

Xiao

et al. 2024

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Rechargeable Li–O2 batteries (LOBs) are considered as one of the most promising candidates for new‐generation energy storage devices. One of major impediments is the poor cycle stability derived from the sluggish reaction kinetics of unreliable cathode catalysts, hindering the commercial application of LOBs. Therefore, the rational design of efficient and durable catalysts is critical for LOBs. Optimizing surface electron structure via the negative shift of the d‐band center offers a reasonable descriptor for enhancing the electrocatalytic activity. In this study, the construction of Ni‐incorporating RuO2 porous nanospheres is proposed as the cathode catalyst to demonstrate the hypothesis. Density functional theory calculations reveal that the introduction of Ni atoms can effectively modulate the surface electron structure of RuO2 and the adsorption capacities of oxygen‐containing intermediates, accelerating charge transfer between them and optimizing the growth pathway of discharge products. Resultantly, the LOBs exhibit a large discharge specific capacity of 19658 mA h g−1 at 200 mA g−1 and extraordinary cycle life of 791 cycles. This study confers the concept of d‐band center modulation for efficient and durable cathode catalysts of LOBs.

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“…Nb 2 O 5 [233] , NiO [230,234] , and TiO 2 [235] are all considered as the promising candidates for LOBs. In addition, ternary spinel oxides (e.g., NiCo 2 O 4 , CuCr 2 O 4 , and MnCo 2 O 4 ) with 2D morphology have garnered significant attention as potential electrocatalysts for LOBs due to their good electronic conductivity and catalytic activity [236][237][238] .…”

Section: D Transition Metal Oxide/hydroxidementioning

confidence: 99%

Bifunctional 2D structured catalysts for air electrodes in rechargeable metal-air batteries

Pei,

Zhang,

Kim

et al. 2024

Energy Mater

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The inherent technical challenges of metal-air batteries (MABs), arising from the sluggish redox electrochemical reactions on the air electrode, significantly affect their efficiency and life cycle. Two-dimensional (2D) nanomaterials with near-atomic thickness have potential as bifunctional catalysts in MABs because of their distinct structures, exceptional physical properties, and tunable surface chemistries. In this study, the chemistry of representative 2D materials was elucidated, and the comprehensive analysis of the primary modification techniques, including geometric structure manipulation, defect engineering, crystal facet selection, heteroatom doping, single-atom catalyst construction, and composite material synthesis, was conducted. The correlation between material structure and activity is illustrated by examples, with the aim of leading the development of advanced catalysts in MABs. We also focus on the future of MABs from the perspective of bifunctional catalysts, definite mechanisms, and standard measurement. We expect this work to serve as a guide for the design of air electrode materials that can be used in MABs.

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Bucket effect on high-performance Li–O₂ batteries based on P-doped 3D NiO microspheres with conformal growth of discharge products

Abstract: Rechargeable Li-O2 batteries are a remarkable technology for electrical energy conversion and storage owing to their exceptionally high theoretical energy density versus that of commercial Li-ion batteries. However, this promising...

Cited by 15 publications

References 80 publications

Enhanced Lithium Storage Performance: Dual-Modified Electrospun Si@MnO@CNFs Composites for Advanced Anodes

Enhanced Lithium Storage Performance: Dual-Modified Electrospun Si@MnO@CNFs Composites for Advanced Anodes

Modulating the d‐Band Center of RuO₂ via Ni Incorporation for Efficient and Durable Li–O₂ batteries

Bifunctional 2D structured catalysts for air electrodes in rechargeable metal-air batteries

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Bucket effect on high-performance Li–O2 batteries based on P-doped 3D NiO microspheres with conformal growth of discharge products

Abstract: Rechargeable Li-O2 batteries are a remarkable technology for electrical energy conversion and storage owing to their exceptionally high theoretical energy density versus that of commercial Li-ion batteries. However, this promising...

Cited by 15 publications

References 80 publications

Enhanced Lithium Storage Performance: Dual-Modified Electrospun Si@MnO@CNFs Composites for Advanced Anodes

Enhanced Lithium Storage Performance: Dual-Modified Electrospun Si@MnO@CNFs Composites for Advanced Anodes

Modulating the d‐Band Center of RuO2 via Ni Incorporation for Efficient and Durable Li–O2 batteries

Bifunctional 2D structured catalysts for air electrodes in rechargeable metal-air batteries

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Product

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Bucket effect on high-performance Li–O₂ batteries based on P-doped 3D NiO microspheres with conformal growth of discharge products

Modulating the d‐Band Center of RuO₂ via Ni Incorporation for Efficient and Durable Li–O₂ batteries