Hollow Carbon Nanospheres with a High Rate Capability for Lithium‐Based Batteries

Tang, Kun; White, Robin J.; Mu, Xiaoke; Titirici, Maria‐Magdalena; Aken, Peter A. van; Maier, Joachim

doi:10.1002/cssc.201100609

Cited by 225 publications

(162 citation statements)

References 37 publications

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“…Here we show that the predicted 3D topological semimetal carbon structure bco-C 16 can be such a system (23), in which all carbon atoms are sp 2 -bonded with ordered 1D channels, as seen from Fig. 1, providing good binding sites and efficient diffusion channels for Li ions.…”

mentioning

confidence: 60%

“…Here we explore the possibility of using all-carbon-based topological semimetal (ACTS) for lithium-ion battery anode material based on the merits of intrinsic high electronic conductivity and ordered porosity. Using state-of-the-art theoretical calculations, we do show, by taking topological semimetal bco-C 16 as an example, that ACTS structures can be promising anode materials with high specific capacity, fast ion kinetics, and slight volume change during operation. Our study would not only pave a pathway for design of high-performance anode materials going beyond the commercially used graphite but would also encourage further theoretical studies on topological phases of carbon materials.…”

Section: Significancementioning

confidence: 95%

“…Here we combine these two by exploring the possibility of using all-carbon-based porous topological semimetal for lithium battery anode material. Based on density-functional theory and the cluster-expansion method, we find that the recently identified topological semimetal bco-C 16 is a promising anode material with higher specific capacity than that of the commonly used graphite anode , and Li ions in bco-C 16 exhibit a remarkable one-dimensional (1D) migration feature, and the ion diffusion channels are robust against the compressive and tensile strains during charging/discharging. Moreover, the energy barrier decreases with increasing Li insertion and can reach 0.019 eV at high Li ion concentration; the average voltage is as low as 0.23 V, and the volume change during the operation is comparable to that of graphite.…”

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confidence: 99%

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All-carbon-based porous topological semimetal for Li-ion battery anode material

Liu

Wang

Sun

2017

Proc. Natl. Acad. Sci. U.S.A.

131

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Topological state of matter and lithium batteries are currently two hot topics in science and technology. Here we combine these two by exploring the possibility of using all-carbon-based porous topological semimetal for lithium battery anode material. Based on density-functional theory and the cluster-expansion method, we find that the recently identified topological semimetal bco-C 16 is a promising anode material with higher specific capacity (Li-C 4 ) than that of the commonly used graphite anode (Li-C 6 ), and Li ions in bco-C 16 exhibit a remarkable one-dimensional (1D) migration feature, and the ion diffusion channels are robust against the compressive and tensile strains during charging/discharging. Moreover, the energy barrier decreases with increasing Li insertion and can reach 0.019 eV at high Li ion concentration; the average voltage is as low as 0.23 V, and the volume change during the operation is comparable to that of graphite. These intriguing theoretical findings would stimulate experimental work on topological carbon materials.carbon materials | topological semimetal | Li-ion battery | anode W ith the growing demand for portable energy sources, it is more and more urgent to improve the present lithium-ion batteries (LIBs) (1, 2). Apart from the cathode and electrolyte, the anode as one of the most important parts in LIBs has been extensively explored for better performance (3, 4). Although the graphite anode has good stability and low cost, its theoretical maximum specific capacity is only 372 mAh/g, which cannot meet the higher requirements of current and future technologies such as advanced electrical vehicles (5). Therefore, efforts have been devoted to finding new candidates with larger specific capacity. Among them, Si-and P-based materials are considered as promising candidates because their specific capacities can reach as high as 4,200 and 2,596 mAh/g (6, 7), respectively, which are much higher than that of the graphite anode. However, they both suffer from the poor reversibility caused by huge volume expansion (Si > 300%; P > 300%) and slow rate capability caused by low electronic conductivity (8, 9). Although the electrochemical performances can be improved via the thin-film technique, porous structures, nanotube/nanowire arrays, carbon coating, etc. (10, 11), the complex synthetic procedures and high fabrication costs prevent their practical applications. Thus, it remains a great challenge to develop an anode material with high capacity, good stability, and fast kinetics as well as low cost.Considering the abundance in resources, flexibility in bonding, and variety in morphology (12, 13), carbon materials have some unique advantages in anode applications. In fact, graphene, carbon nanotubes (CNTs), carbon nanofibers (CNFs), carbon nanorings, and porous carbon (14-16) have been extensively explored for this purpose (17, 18). For instance, pristine graphene shows a weak adsorption of Li and has low capacity whereas defective graphene can bind Li stably and has a higher capacity than gra...

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confidence: 60%

Section: Significancementioning

confidence: 95%

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confidence: 99%

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All-carbon-based porous topological semimetal for Li-ion battery anode material

Liu

Wang

Sun

2017

Proc. Natl. Acad. Sci. U.S.A.

131

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“…Also, the overlapping of the CV curves in the subsequent cycles is indicative of good battery stability and reversible sodium-ion interaction. From the CV curves, the storage behaviour of sodium-ions in both the RGOs seems to be similar to that of lithium-ions in graphitic-carbon [49]. As a result, it can be concluded that the mechanism of sodium-ion interactions with the RGOs is likely to involve chemisorption on hetero-atoms, filling of nanopores and reversible surface physical adsorption [50].…”

Section: Electrochemical Performance Vs Na/na +mentioning

confidence: 75%

Sodium ion storage in reduced graphene oxide

Kumar

Gaddam

Varanasi

et al. 2016

Electrochimica Acta

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Sodium ion storage in reduced graphene oxide, Electrochimica Acta http://dx.doi.org/10. 1016/j.electacta.2016.08.058 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractThe performance of few-layered metal-reduced graphene oxide (RGO) as a negative electrode material in sodium-ion battery was investigated. Experimental and simulation results indicated that the as-prepared RGO with a large interlayer spacing and disordered structure enabled significant sodium-ion storage, leading to a high discharge capacity. The strong surface driven interactions between sodium ions and oxygen-containing groups and/or defect sites led to a high rate performance and cycling stability. The RGO anode delivered a discharge capacity of 272 mA h g -1 at a current density of 50 mA g -1 , a good cycling stability over 300 cycles and a superior rate capability. The present work provides new insights into optimizing RGOs for high-performance and low-cost sodium-ion batteries.

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“…Carbon micro/nanospheres (CMSs/CNSs) have found applications as Li-ion battery anode [19][20][21], biosensor electrodes for sensing heavy metal ions [22], catalyst supports [23][24][25], and electrode materials for supercapacitors [5,26]. Nevertheless, for the latest application, a green and facile route to prepare these carbon materials with suitable packing structure and pore network is still challenging.…”

Section: Introductionmentioning

confidence: 99%