Encapsulating NiS nanocrystal into nitrogen-doped carbon framework for high performance sodium/potassium-ion storage

Zhao, Xu; Gong, Feiyan; Zhao, Yue; Huang, Bin; Qian, Dong; Wang, Hong‐En; Zhang, Wenhua; Yang, Zhijian

doi:10.1016/j.cej.2019.123675

Cited by 127 publications

(66 citation statements)

References 52 publications

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“…Specifically, the main peak at around 284.6 eV corresponds to conjugated CC/CC bonds (sp 2 carbon), while the peaks at 285.5 and 288.2 eV, indicating different bonding structures of the CN and OCO, derived from the decomposition of polydopamine during the pyrolysis process. [40][41][42] Nitrogen sorption analysis was conducted to examine the specific surface area and pore characteristics of the as-synthesized materials. As show in Figure S4a,b (Supporting Information), the Brunauer-Emmett-Teller (BET) surface area of the ZnTe was calculated to be 29.9 m 2 g −1 .…”

Section: (4 Of 10)mentioning

confidence: 99%

“…Similar results can be found in other papers. [42,43] To further analyze the advantages of structure of the ZnTe@C, 85% ZnTe mixed with 15% commercial graphite (15C-85ZnTe) was evaluated as anode for LIBs. As shown in Figure S6e (Supporting Information), the discharge capacity drops steadily from about 1200 to about 488 mA h g −1 after 50 cycles, indicating the structural stability of the ZnTe@C. Furthermore, commercial graphite was tested for comparison as anode for LIBs.…”

Section: (6 Of 10)mentioning

confidence: 99%

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Rational Design of Core‐Shell ZnTe@N‐Doped Carbon Nanowires for High Gravimetric and Volumetric Alkali Metal Ion Storage

Zhang

Qiu

Zheng

et al. 2020

Adv Funct Materials

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Among the various semiconductor materials, zinc telluride possesses the lowest electron affinity and ultrafast charge separation capability, facilitating improved charge transfer kinetics. In addition, ZnTe has a relatively high density, contributing to high volumetric capacity. Here, 1D N-doped carbon-coated ZnTe core-shell nanowires (ZnTe@C) are designed and prepared via a facile ion-exchange and carbonization technique. When evaluated as anode for metal ion batteries, it demonstrates superior electrochemical performance in both Li and Na ion storage, including high gravimetric and volumetric capacities (1119 mA h g −1 and 906 mA h cm −3 , respectively, at 100 mA g −1 for Li ion storage), excellent high-rate capability, and long-term cycling stability. This remarkable electrochemical performance is attributed to the low electron affinity and high density of ZnTe, and the amorphous nature of the N-doped carbon layer in the heterostructured ZnTe@C nanowires, which not only provide fast charge transfer paths, but also effectively maintain the structural and electrical integrity of the ZnTe. The strategy of embedding high density and highperformance active materials in highly conductive nanostructures represents an effective way of achieving electrode materials with excellent gravimetric and volumetric capacities towards superior energy storage systems.

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Section: (4 Of 10)mentioning

confidence: 99%

Section: (6 Of 10)mentioning

confidence: 99%

Rational Design of Core‐Shell ZnTe@N‐Doped Carbon Nanowires for High Gravimetric and Volumetric Alkali Metal Ion Storage

Zhang

Qiu

Zheng

et al. 2020

Adv Funct Materials

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show abstract

“…When the b value is close to 1, it indicates the electrochemical process is dominated by capacitance control; while it is close to 0.5, the diffusion behavior is dominant. [ 38 ] In our study, the b values of peaks 1 and 2 are 0.5546 and 0.5987, respectively, which indicates that the diffusion‐control process is dominant. It is further analyzed by the formula i = k 1 v + k 2 v 1/2 , [ 39 ] where k 1 v and k 2 v 1/2 are the capacitance effect and diffusion control response, respectively.…”

Section: Resultsmentioning

confidence: 57%

A General Template‐Induced Sulfuration Approach for Preparing Bifunctional Hollow Sulfides for High‐Performance Al‐ and Li‐ion Batteries

et al. 2020

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Hollow nanomaterials have attracted broad attention due to their geometric configuration with some special properties such as fast ion diffusion, and accommodating structural transformation. However, conventional approaches for preparing hollow nanostructure commonly need an additional template removal process, which is time‐consuming and may require some corrosive chemicals. Herein, a general template‐induced sulfuration method is presented which is applicable for preparing a broad set of hollow sulfides. Sulfur particles are synthesized, which are then used as both template and sulfurizing reagent. During the heating, the template is removed along with the sublimation of sulfur, meanwhile the sulfur vapors sulfurize the coated precursor, finally forming a hollow sulfide nanostructure. As a demonstrating case study, a hollow NiS2 nanostructure is prepared through the presented approach which is confirmed extendable for many other sulfides such as CoS2, Bi2S3, and Cu2S. Furthermore, the hollow NiS2 exhibits bifunctional properties using as Al‐ion battery cathode and Li‐ion battery anode with good electrochemical performance, such as a 1000‐cycles stable capacity at high current density of 5 A g−1, stable temperature‐endurable property, and well‐recoverable rate performance.

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“…For example, nitrogen doping with pyridinic N and pyrrolic N, in particular, could boost the insertion/de-insertion ability of the sodium ion. Moreover, the abundant defects on their surface can supply more active sites and diffusion pathways for Na + storage [132].…”

Section: Heteroatom-doped Carbon Modificationmentioning

confidence: 99%

Towards high-performance anodes: Design and construction of cobalt-based sulfide materials for sodium-ion batteries

Guan

et al. 2021

Journal of Energy Chemistry

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Encapsulating NiS nanocrystal into nitrogen-doped carbon framework for high performance sodium/potassium-ion storage

Cited by 127 publications

References 52 publications

Rational Design of Core‐Shell ZnTe@N‐Doped Carbon Nanowires for High Gravimetric and Volumetric Alkali Metal Ion Storage

Rational Design of Core‐Shell ZnTe@N‐Doped Carbon Nanowires for High Gravimetric and Volumetric Alkali Metal Ion Storage

A General Template‐Induced Sulfuration Approach for Preparing Bifunctional Hollow Sulfides for High‐Performance Al‐ and Li‐ion Batteries

Towards high-performance anodes: Design and construction of cobalt-based sulfide materials for sodium-ion batteries

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