Tunable porous carbon spheres for high-performance rechargeable batteries

Tian, Huajun; Wang, Tianyi; Zhang, Fan; Zhao, Shuoqing; Wan, Steven; He, Fan; Wang, Guoxiu

doi:10.1039/c8ta02353k

Cited by 87 publications

(49 citation statements)

References 220 publications

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“…For Se/porous carbon composite materials, the charge transfer resistance can be decreased and the shuttle effect of polyselenides can be suppressed because of the high conductivity of carbon matrix and the strong affinity of porous carbon for Se particles 7 . Many porous carbon materials have been studied to construct Se/ porous carbon composites for Li-Se batteries, such as carbon nanospheres 14,15 , carbon nanofibers 16 , hierarchical porous carbon 17 and porous hollow carbon bubbles 18 . However, high-power Li-Se batteries with long cycling performance under high currents have never been reported due to the unsatisfactory performance of Se cathodes.…”

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confidence: 99%

High-power lithium–selenium batteries enabled by atomic cobalt electrocatalyst in hollow carbon cathode

et al. 2020

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Selenium cathodes have attracted considerable attention due to high electronic conductivity and volumetric capacity comparable to sulphur cathodes. However, practical development of lithium-selenium batteries has been hindered by the low selenium reaction activity with lithium, high volume changes and rapid capacity fading caused by the shuttle effect of polyselenides. Recently, single atom catalysts have attracted extensive interests in electrochemical energy conversion and storage because of unique electronic and structural properties, maximum atom-utilization efficiency, and outstanding catalytic performances. In this work, we developed a facile route to synthesize cobalt single atoms/nitrogen-doped hollow porous carbon (CoSA-HC). The cobalt single atoms can activate selenium reactivity and immobilize selenium and polyselenides. The as-prepared selenium-carbon (Se@CoSA-HC) cathodes deliver a high discharge capacity, a superior rate capability, and excellent cycling stability with a Coulombic efficiency of ~100%. This work could open an avenue for achieving long cycle life and high-power lithium-selenium batteries.

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High-power lithium–selenium batteries enabled by atomic cobalt electrocatalyst in hollow carbon cathode

et al. 2020

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“…1D construction served as the effective highway for ions transferring, and 2D architecture improved significant properties of interface . Considering the volume expansion of metal–selenide, 3D hollow structure was selected as the optimized synthetic manners to boost the utilization of potential . Moreover, the enlarged electrode–electrolyte contacting area and increased electrochemical active sites were still found .…”

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confidence: 99%

Hierarchical Hollow‐Microsphere Metal–Selenide@Carbon Composites with Rational Surface Engineering for Advanced Sodium Storage

et al. 2018

Advanced Energy Materials

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As a result of its high‐energy density, metal–selenides have demanded attention as a potential energy‐storage material. But they suffer from volume expansion, dissolved poly‐selenides and sluggish kinetics. Herein, utilizing' thermal selenization via the Kirkendall effect, microspheres of NiSe2 confined by carbon are successfully obtained from the self‐assembly of Ni‐precursor/PPy. The derived hierarchical hollow architecture increases the active defects for sodium storage, while the existing double N‐doped carbon layers significantly alleviate the volume swelling. As a result, it shows ultrafast rate capability, delivering a stable capacity of 374 mAh g−1, even after 3000 loops at 10.0 A g−1. These remarkable results may be ascribed to the NiOC bonds on the interface of NiSe2 and the carbon film, which leads to the faster transfer of ions, the effective trapping of poly‐selenide, and the highly reversible conversion reaction. The kinetic analysis of cyclic voltammetry (CV) demonstrates that the electrochemical process is mainly dominated by pseudocapacitive behaviors. Supported by the results of electrochemical impedance spectroscopy (EIS), it is confirmed that the solid–electrolyte interface films are reversibly formed/decomposed during cycling. Given this, this elaborate work might open up a potential avenue for the rational design of metal‐sulfur/selenide anodes for advanced battery systems.

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“…The design and synthesis of functional colloidal carbon spheres has recently attracted great attention because of their wide applications in a number of research areas such as energy storage and conversion, catalysis, water and air purification, and adsorption . Their suitability for these application is attributed to the very unique properties of colloidal carbon spheres such as tunable porous structures, controllable particle size, large surface area, and controllable surface chemistry . All these properties of colloidal carbon spheres are highly dependent on their synthesis methodology.…”

Section: Introductionmentioning

confidence: 99%

“…A number of excellent reviews on colloidal carbon spheres have been published in recent years, especially for energy storage applications . In this context, this review article aims to systematically summarize the latest works, mainly focusing on synthetic approaches to optimized properties of porous carbon spheres toward electrochemical storage, conversions, and catalysis ( Figure ), with nanoreactors as a clue.…”

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Nanoengineering Carbon Spheres as Nanoreactors for Sustainable Energy Applications

2019

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adsorption. [1][2][3][4] Their suitability for these application is attributed to the very unique properties of colloidal carbon spheres such as tunable porous structures, controllable particle size, large surface area, and controllable surface chemistry. [5,6] All these properties of colloidal carbon spheres are highly dependent on their synthesis methodology. Over the past decades, great efforts have been made on the synthesis, characterization, and extension of the application of porous carbon spheres. More research advances on colloidal carbon spheres would provide new opportunities to understand their physical and chemical properties, as well as for the design and preparation of new structured carbon spheres built up from the molecular level, which can further provide guidelines for practical applications.To mimic the structure of cells, the asprepared artificial cells should own some properties such as spatial compartmentalization and selective permeability. Until now, polymersomes, [7] liposomes, [8] and multiple emulsions [9] have been used to imitate the structures and properties of natural cells. However, the softness, poor mechanical strength, and chemical robustness have hindered their practical applications. The carbon spheres are potentially promising candidates for construction of cell-like structures. The ideal colloidal carbon spheres should possess all or most of the following properties: a) large surface area and controllable surface functionalities for effective dispersion and loading of metal nanoparticles or other active species on their surface; b) superior conductivity to provide electron pathways; c) tunable porosity and particle size for facile mass transport; d) high stability for long term operation. [10][11][12][13] To achieve this goal, a series of synthetic strategies for these nanostructured carbon spheres have been developed, such as the Stöber method, [13] the template method, [14,15] hydrothermal carbonization (HTC), [16] and microemulsion polymerization. [17] To further modify the carbon spheres with various porous structures and functionalities, novel technologies for pore size control, surface modification, heteroatom doping, and graphitization engineering have also been developed and widely utilized.A number of excellent reviews on colloidal carbon spheres have been published in recent years, especially for energy storage applications. [1,5,18,19] In this context, this review article aims to systematically summarize the latest works, mainly focusing on synthetic approaches to optimized properties of Colloidal carbon sphere nanoreactors have been explored extensively as a class of versatile materials for various applications in energy storage, electrochemical conversion, and catalysis, due to their unique properties such as excellent electrical conductivity, high specific surface area, controlled porosity and permeability, and surface functionality. Here, the latest updated research on colloidal carbon sphere nanoreactor, in terms of both their synthesis and applications, is...

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Tunable porous carbon spheres for high-performance rechargeable batteries

Cited by 87 publications

References 220 publications

High-power lithium–selenium batteries enabled by atomic cobalt electrocatalyst in hollow carbon cathode

High-power lithium–selenium batteries enabled by atomic cobalt electrocatalyst in hollow carbon cathode

Hierarchical Hollow‐Microsphere Metal–Selenide@Carbon Composites with Rational Surface Engineering for Advanced Sodium Storage

Nanoengineering Carbon Spheres as Nanoreactors for Sustainable Energy Applications

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