Areca-inspired core-shell structured MnO@C composite towards enhanced lithium-ion storage

Zhu, Linli; Wang, Yun; Wang, Minji; Xiong, Yaping; Zhang, Ze; Yu, Ji; Qu, Yaohui; Cai, Jun; Zhang, Youdi

doi:10.1016/j.carbon.2021.08.081

Cited by 23 publications

(10 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The characteristic peak at 284.8 eV correlates to the C–C or CC bond, and the peaks located at 286.5 and 288.2 eV are related to the C–N and CO bonds associated with surface functional groups, respectively. Moreover, the deconvoluted N 1s spectrum is shown in Figure f, which correlates to pyridine-N (398.2 eV), pyrrolic-N (400.1 eV), and graphitic-N (401.2 eV), respectively. ,, Notably, pyridine nitrogen and pyrrolic nitrogen as functional groups at the active site of electrochemical reaction can improve the surface-induced capacitance and enhance the diffusion of active lithium ions, thereby increasing the total capacity of the MnO@C@HCS anode. , …”

Section: Resultsmentioning

confidence: 94%

“…It can be seen from Figure a that CV curves have the same trend at different scanning rates. The peak current in the CV curve is a function of the scan rate, as showed in eqs and i = a v b log ( i ) = b 0.25em log ( v ) + log ( a ) The value of b can be determined from the slope of the linear plots of log ( i ) versus log (v), and the value of b reflects the electrochemical behavior, where b = 0.5 represents the diffusion control process and b = 1.0 illustrates ideal surface-capacitive behavior. ,, The calculated slope is 0.80 at 25 °C (Figure b), indicating that the storage of lithium ions during cycling is achieved by the collaboration of the diffusion control process and the pseudocapacitor behavior. Figure c shows that the MnO@C@HCS anode exhibits a 45.98% of capacitance contribution at 0.50 mV s –1 .…”

Section: Resultsmentioning

confidence: 99%

“…Compared with the previously reported MnO-based nanocomposites, MnO@C@HCS shows a superior rate performance (Figure 4f). 15,21,29,33,35,40,43,44 To understand the reaction kinetics process, the galvanostatic intermittent titration technique (GITT) is a good choice to obtain the diffusion coefficients of lithium ions (D Li ) at different potentials. 45 The calculation equation of D Li and related explanation are presented in the Supporting Information.…”

Section: Resultsmentioning

confidence: 99%

“…As shown in Figure S6, the MnO@C@HCS anode with high mass loading still has a specific capacity of 335. 33 after 100 cycles at 1.00 A g −1 . When the mass loading of the electrode material increased, the electrochemical performance of the MnO@C@HCS anode reduced to some extent; however, it is still more desirable.…”

Section: Resultsmentioning

confidence: 99%

“…Third, the electrical conductivity and electrochemical performance of the carbon material can be improved by suitable doping (such as N, B, etc.). 33 Herein, to realize the rapid lithiation/delithiation in anode material at low temperatures, we designed a kind of anode material with single-shell (carbon) multiple-core (ultra-small MnO@C nanoparticles) hollow carbon nanospheres, which is recorded as MnO@C@HCS. The combination of MnO@C nanoparticles and carbon shell can make full use of MnO at low temperatures.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Single-Shell Multiple-Core MnO@C Hollow Carbon Nanospheres for Low-Temperature Lithium Storage

Dong

Geng

Yue

et al. 2023

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Lithium-ion batteries (LIBs) have been extensively employed in a range of electrical vehicles and portable devices in virtue of their high energy density and stable cycle life. However, poor performance under low temperatures hinders their application in cold climates and regions. Herein, single-shell (carbon) multiple-core (ultra-small MnO@C nanoparticles) hollow carbon nanospheres (MnO@C@HCS) were prepared by a sacrificial template method, and MnO@C@HCS showed excellent low-temperature electrochemical performance. These MnO@C cores with large surface areas can shorten diffusion lengths of lithium ions and enhance diffusion rates along their rich grain boundaries, enabling rapid charging/discharging. The hollow carbon nanosphere with a porous shell can block serious agglomeration of nanoparticles and regulate the amount of electrolyte filled in the hollow nanosphere to reduce side reactions between highly active electrode materials and electrolytes. The hollow structure formed between the core and the shell mitigates the volume expansion and contraction during cycling. The MnO@C@HCS anode exhibits high specific capacities (1027 mAh g −1 at 0.20 A g −1 ) and high rate performance (353 mAh g −1 at 10.00 A g −1 ) under room temperature. Furthermore, the MnO@C@HCS anode maintains a satisfactory discharge capacity under low temperatures (461 mAh g −1 at 0.05 A g −1 under −10 °C, 220 mAh g −1 at 0.10 A g −1 under −20 °C, respectively). The contribution of pseudocapacitance to the capacity decreases as the test temperature drops. Our strategy provides a design concept for the high-performance anode for low-temperature lithium storage.

show abstract

Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Single-Shell Multiple-Core MnO@C Hollow Carbon Nanospheres for Low-Temperature Lithium Storage

Dong

Geng

Yue

et al. 2023

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

Unleashing the Full Potential of Photo‐Driven CO Hydrogenation to Light Olefins over Carbon‐Coated CoMn‐Based Catalysts

Li,

et al. 2023

Advanced Materials

View full text Add to dashboard Cite

As a nonpetroleum process, photodriven Fischer–Tropsch synthesis provides a practical approach for the synthesis of light olefins. However, maximizing the solar‐energy conversion efficiency based on the design of the composite catalyst and understanding the catalytic mechanism remain challenging. Herein, a novel carbon‐coated CoMn‐based catalyst, a C‐coated mixture of Co and MnO, is designed for the efficient conversion of syngas to light olefins under light irradiation. The CoMnC‐450 catalyst exhibits a CO conversion of 12.6% with a selectivity to light olefins of 36.5% under light irradiation, showing 5.5‐fold the activity of thermocatalysis. Experimental characterizations as certain the CoMnC‐450 catalyst can be excited to generate photogenerated carriers under light irradiation and then the electron transfer to metallic Co to form electron‐rich active sites with carbon mediation, thereby enhancing the catalytic performance. In situ Fourier transform infrared spectroscopy and theoretical calculation based on density functional theory reveal the unique roles of photogenerated carriers in promoting the adsorption and activation of CO molecules. This study demonstrates a feasible catalyst model to efficiently utilize full‐spectral solar light to produce the value‐added chemical.

show abstract

Advancements in Manganese‐Based Cathode for Sustainable Energy Utilization

Zhou,

Wu,

et al. 2024

ChemSusChem

View full text Add to dashboard Cite

Manganese‐based compounds, especially manganese oxides, are one of the most exceptional electrode materials. Specifically, manganese oxides have gained significant interest owing to their unique crystal structures, high theoretical capacity, abundant natural availability and eco‐friendly nature. However, as transition metal semiconductors, manganese oxide possess low electrical conductivity, limited rate capacity, and suboptical cycle stability. Thus, combining manganese oxides with carbon or other metallic materials can significantly improve their electrochemical performance. These composites increase active sites and conductivity, thereby improving electrode reaction kinetics, cycle stability, and lifespan of supercapacitors (SCs) and batteries. This paper reviews the latest applications of Mn‐based cathodes in SCs and advanced batteries. Moreover, the energy storage mechanisms were also proposed. In this review, the development prospects and challenges for advanced energy storage applications of Mn‐based cathodes are summarized.

show abstract

Areca-inspired core-shell structured MnO@C composite towards enhanced lithium-ion storage

Cited by 23 publications

References 62 publications

Single-Shell Multiple-Core MnO@C Hollow Carbon Nanospheres for Low-Temperature Lithium Storage

Single-Shell Multiple-Core MnO@C Hollow Carbon Nanospheres for Low-Temperature Lithium Storage

Unleashing the Full Potential of Photo‐Driven CO Hydrogenation to Light Olefins over Carbon‐Coated CoMn‐Based Catalysts

Advancements in Manganese‐Based Cathode for Sustainable Energy Utilization

Contact Info

Product

Resources

About