Facile regulation of carbon framework from the microporous to low-porous via molecular crosslinker design and enhanced Na storage

Xu, Fei; Han, Haojie; Qiu, Yuqian; Zhang, En; Repich, Hlib; Qu, Changzhen; Yu, Huiwu; Wang, Hongqiang; Kaskel, Stefan

doi:10.1016/j.carbon.2020.05.081

Cited by 24 publications

(11 citation statements)

References 57 publications

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“…S(1) in the ESM) for EE-MoS2 ( Fig. 4(e)), respectively, suggesting the simultaneous presence of diffusiondominated and capacitive contributions to capacity [40][41][42]. Whereas the b values of peaks A and C are 0.91 (diffusiondominated and capacitive contributions) and 1.13 (only capacitive contribution) for ED-MoS2 (Fig.…”

Section: Resultsmentioning

confidence: 93%

Edge-enriched MoS2 for kinetics-enhanced potassium storage

Han

et al. 2020

Nano Res.

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Potassium-ion batteries (PIBs) hold great promise as alternatives to lithium ion batteries in post-lithium age, while face challenges of slow reaction kinetics induced by the inherent characteristics of large-size K +. We herein show that creating sufficient exposed edges in MoS 2 via constructing ordered mesoporous architecture greatly favors for improved kinetics as well as increased reactive sites for K storage. The engineered MoS 2 with edge-enriched planes (EE-MoS 2) is featured by three-dimensional bicontinuous frameworks with ordered mesopores of ~ 5.0 nm surrounded by thin wall of ~ 9.0 nm. Importantly, EE-MoS 2 permits exposure of enormous edge planes at pore walls, renders its intrinsic layer spacing more accessible for K + and accelerates conversion kinetics, thus realizing enhanced capacity and high rate capability. Impressively, EE-MoS 2 displays a high reversible charge capacity of 506 mAh•g −1 at 0.05 A•g −1 , superior cycling capacities of 321 mAh•g −1 at 1.0 A•g −1 after 200 cycles and a capacity of 250 mAh•g −1 at 2.0 A•g −1 , outperforming edge-deficient MoS 2 with nonporous bulk structure. This work enlightens the nanoarchitecture design with abundant edges for improving electrochemical properties and provides a paradigm for exploring high-performance PIBs.

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Section: Resultsmentioning

confidence: 93%

Edge-enriched MoS2 for kinetics-enhanced potassium storage

Han

et al. 2020

Nano Res.

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Section: Materials Designmentioning

confidence: 99%

“…These carbon nanofibers possessed obvious plateau capacities, and their capacity can reach 340 mAh g −1 at a current density of 0.1 A g −1 (Figure 12g). Moreover, Kaskel et al [ 140 ] prepared a cross‐linked PS network by coupling benzene rings of PS through the Scholl reaction (Figure 12h). The coupled benzene rings can promote the aromatization of the polymer during pyrolysis, which was helpful for the growth of pseudo‐graphite phases.…”

Section: Materials Designmentioning

confidence: 99%

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Hard‐Carbon Anodes for Sodium‐Ion Batteries: Recent Status and Challenging Perspectives

Shao

Jian

2022

Adv Energy and Sustain Res

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Sodium‐ion batteries (SIBs) hold great potential in the application of large‐scale energy storage. With the coming commercialization of SIBs, developing advanced anode of particularly hard carbon is becoming increasingly urgent yet challenging. Hard carbon still suffers from unclear sodium storage mechanism, unsatisfactory performance, and low initial Coulombic efficiency (ICE). Herein, the current state‐of‐the‐art advances in designing hard carbon anodes for high‐performance SIBs is summarized. First, the formation process of hard carbon and typical sodium storage models of “insertion–adsorption,” “adsorption–insertion,” “adsorption–pore filling,” and “adsorption–insertion–pore filling” are introduced systematically. Then, the key strategies including morphological engineering, heteroatom doping, and graphitic structure regulation are presented to enhance the capacity of hard carbon based on the in‐depth understanding of sodium storage behaviors. Subsequently, to promote the practical application of hard carbon, more attention is paid to the methods of ICE improvement, including electrolyte optimization, defect and surface engineering, and presodiation. Whereafter, hard‐carbon‐based SIBs and their intriguing applications are briefly sketched. Finally, future directions and challenging perspectives of hard‐carbon anodes for SIBs are proposed from the viewpoints of storage mechanisms, electrode structures, and presodiation techniques.

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“…With continuous efforts, in recent years, novel anodes, including conversion-type SnO 2 , P and Co 3 O 4 , alloying-type Bi, , Sb and Sn, and intercalation-type Na 2 Ti 3 O 7 , , have been proposed to fulfill the practical use of sodium-ion batteries. Among these anodes, hard carbon materials have attracted lots of attention in terms of high conductivity, large capacity, and low cost. − Normally, hard carbon presents a highly disordered skeleton with numerous structural defects, well-developed nanopores, and large interlayer distance. , This unique structural hierarchy endows hard carbon with multiple sodium storage ways, such as defect adsorption, pore filling, and intercalation reactions, and then, it is able to contribute high sodium storage capacities over 300 mAh g –1 . − Although some important findings have been reported, to meet the application demand, the sodium storage performance of hard carbon needs to be further improved. Considering the fact of the sodium storage mechanism, an ideal carbon anode should have well-defined micro/nanostructures for optimized ion transfer and shortened ion diffusion length, abundant structural defects for capacitive sodium storage, and tailorable interlayer distance for the sodium intercalation reaction.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen, Sulfur, and Phosphorus Codoped Hollow Carbon Microtubes Derived from Silver Willow Blossoms as a High-Performance Anode for Sodium-Ion Batteries

Yang

Cheng

et al. 2021

Energy Fuels

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Hard carbon materials have been considered as one of the most promising candidates as the anode in sodium-ion batteries. However, scale application of state-of-the-art hard carbon anodes is still hampered on account of their complicated, toxic, and time-consuming preparation techniques. In the present paper, silver willow blossoms composed of natural micrometer-scale fibers are employed to construct N, S, and P codoped hollow carbon microtubes (HCMTs) by direct high-temperature carbonization. The HCMT has a nanoscale wall with several micrometer-sized hollow cavities, which is facilitated to optimize the sodium-ion transfer. In addition, the temperature-dependent, tailorable interlayer spacing coupled with doped heteroatoms is able to provide sufficient energy storage sites. By combining these unique structural advantages, the HCMT exhibits impressive sodium storage performance. The HCMT sample pyrolyzed under 1300 °C is able to deliver a highly reversible capacity of 302 mAh g–1, and after repeated charge/discharge for 100 times, the capacity retains 301 mAh g–1, indicating no visible degradation. Moreover, under a large current density up to 1 A g–1, a high capacity of 201 mAh g–1 is still achieved, demonstrating good rate capability.

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Facile regulation of carbon framework from the microporous to low-porous via molecular crosslinker design and enhanced Na storage

Cited by 24 publications

References 57 publications

Edge-enriched MoS2 for kinetics-enhanced potassium storage

Edge-enriched MoS2 for kinetics-enhanced potassium storage

Hard‐Carbon Anodes for Sodium‐Ion Batteries: Recent Status and Challenging Perspectives

Nitrogen, Sulfur, and Phosphorus Codoped Hollow Carbon Microtubes Derived from Silver Willow Blossoms as a High-Performance Anode for Sodium-Ion Batteries

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