Highly porous TiO2 hollow microspheres constructed by radially oriented nanorods chains for high capacity, high rate and long cycle capability lithium battery

Jin, Jun; Huang, Shaozhuan; Shu, Jie; Wang, Hong‐En; Liu, Yu; Yu, Yan; Chen, Lihua; Wang, Bin-Jie; Su, Bao‐Lian

doi:10.1016/j.nanoen.2015.07.001

Cited by 73 publications

(53 citation statements)

References 43 publications

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“…Notably, it should also be mentioned that the continuous lithium insertion of LixTiO 2 in some special areas will result in the atomic rearrangement on the surface of the rutile TiO 2 nanostructure to form the new crystals of LixTiO 2 . Upon the above analysis for the cycling and rate processes, the new obtained LixTiO 2 crystal domains should prefer to further facilitate the Li + insertion/desertion capability of the rutile TiO 2 electrode, leading to the good capacity retention and superior rate performance [53]. …”

mentioning

confidence: 99%

Eco-friendly synthesis of rutile TiO2 nanostructures with controlled morphology for efficient lithium-ion batteries

Gao

Jiao

Wang

et al. 2016

Chemical Engineering Journal

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mentioning

confidence: 99%

Eco-friendly synthesis of rutile TiO2 nanostructures with controlled morphology for efficient lithium-ion batteries

Gao

Jiao

Wang

et al. 2016

Chemical Engineering Journal

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“…The interspersed TiO 2 nanoparticles can chemisorb the polysulfides and contribute some capacity to the cells as shown in Figure b. It can be seen that, in addition to the typical discharge and charge plateaus, the third discharge plateau and the second charge plateau have appeared, respectively, corresponding to the lithiation and delithiation of anatase TiO 2 . The middle layers (Figure S2a2–e2, Supporting Information) of the sandwich cathodes consist of sulfur powder, binder, and conductive agent, all of them have a similar appearance.…”

Section: Resultsmentioning

confidence: 96%

“…TiO 2 has been intensively studied as both anode and cathode materials for lithium‐ion batteries because of its discharge–charge voltage around ≈1.7 V . Using TiO 2 as an adsorbent for polysulfides has been extensively studied in recent years .…”

Section: Introductionmentioning

confidence: 99%

A Novel Strategy for the Selection of Polysulfide Adsorbents Toward High‐Performance Lithium‐Sulfur Batteries

Shang

Qin

Guo

et al. 2019

Adv Materials Inter

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shuttle effect still attenuates the capacity during cycles. And the preparation processes of the carbon materials used are usually complex and time-consuming. 2) Metal oxides have been widely studied as electrode materials [11][12][13] and strong chemical interaction of the metal oxides with polysulfides has been utilized to limit the shuttle effect during cycles. [14][15][16][17][18][19][20][21] It was found that the metal oxides can form strong chemical adsorption affinity with polysulfides, which significantly inhibits the shuttle effect and improves the cycle performance of LSBs. Nevertheless, most of the metal oxides cannot provide capacity due to their discrepant discharge-charge voltage with sulfur, adding them into the active materials will decrease the specific capacity of the cathodes. Therefore, if we choose a polar cathode material whose discharge-charge voltage coincides with sulfur, it can not only control the undesirable shuttle of LiPS but also contribute part of capacity to LSBs. [22] TiO 2 has been intensively studied as both anode and cathode materials for lithium-ion batteries because of its dischargecharge voltage around ≈1.7 V. [23][24][25][26] Using TiO 2 as an adsorbent for polysulfides has been extensively studied in recent years. [27][28][29][30] However, its contribution to the capacity of the cathode was often neglected due to the low discharge-charge platform. In this work, we used TiO 2 as an example to investigate the contributes of the TiO 2 additive to the adsorption for polysulfides and the total capacity of sulfur cathode. The cathode with a sandwich structure shown in Figure 1 was prepared by a simple coating method. In such a cathode, the 3D interwoven structure of CNTs can facilitate the transportation of electrons and ions and limit the shuttle of polysulfides by physical adsorption to some extent. The TiO 2 nanoparticles act not only as an absorbent to immobilize polysulfides but also as an active material in cathode to react with lithium ions during discharge process and thus contribute extra cathode capacity to batteries. As a result, the sandwich cathode with a reasonable composition ratio of CNTs to TiO 2 nanoparticles and a higher sulfur loading delivers a reversible capacity of 816 mAh g −1 after 200 cycles at 0.5 C and a capacity as high as 517 mAh g −1 after 500 cycles at 1.0 C. X-ray diffraction (XRD) patterns of the sandwich cathode were in situ measured to analyze the phase change during discharge-charge processes, and the interactions between the polysulfides and the TiO 2 additive were investigated based on density functional theory (DFT). The experimental data prove that our hypothesis can be realized and the work provides a new idea for the selection of the polysulfide adsorbents.Selection of polysulfide adsorbents for most lithium-sulfur batteries (LSBs) has only one purpose, which is to suppress the shuttle effect. However, addition of the polysulfides adsorbents inevitably reduces the energy density of LSBs. In this article, a new idea to select a polar ca...

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“…In order to improve the kinetics and capacity of anode, some electrode materials with pseudocapacitive behaviors are proposed, such as Nb 2 …”

Section: 20mentioning

confidence: 99%

“…As the most widely applicable energy storage devices, lithium-ion batteries (LIBs) and supercapacitors (SCs) have received wide attention and discussion. [1][2][3][4] However, obvious defects caused by their different charge storage mechanisms exist in both of them. LIBs commonly can provide energy density as high as 150-200 W h kg À1 , but are restricted by their low power density (below 1000 W kg À1 ) and poor cycle life (usually less than 1000 cycles).…”

Section: Introductionmentioning

confidence: 99%

Preparation of a NbN/graphene nanocomposite by solution impregnation and its application in high-performance Li-ion hybrid capacitors

et al. 2017

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Lithium-ion hybrid capacitors (LIHCs) have received a mushrooming amount of attention due to their high power density and energy density. However, the imbalanced dynamics between positive and negative electrodes limit their practical applications. Thus, in order to develop a kind of anode material with high power, we report a simple synthesis technology of a NbN nanoparticles/graphene nanosheets (NbN/ GNSs) nanocomposite with fast Li insertion/extraction properties. Through a facile solution impregnation followed by annealing treatment, we get a freestanding layer-stacked structure combining 2D graphene nanosheets and 0D NbN nanoparticles. It shows a high reversible capacity of z 450 mA h g À1 at 0.1 A g À1 , moreover, as a result of the fast pseudocapacitive performance, it also shows a remarkable rate capability and cycle stability (90% capacity retention at 5 A g À1 after 10 000 cycles). Meanwhile, the LIHC with a NbN/GNSs anode and activated polyaniline derived carbon (APDC) cathode delivers the maximum energy density of 136 W h kg À1, and the highest power density of 25 kW kg À1 as well as a stable cycle life in the potential range of 1.0-4.0 V.

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Highly porous TiO2 hollow microspheres constructed by radially oriented nanorods chains for high capacity, high rate and long cycle capability lithium battery

Cited by 73 publications

References 43 publications

Eco-friendly synthesis of rutile TiO2 nanostructures with controlled morphology for efficient lithium-ion batteries

Eco-friendly synthesis of rutile TiO2 nanostructures with controlled morphology for efficient lithium-ion batteries

A Novel Strategy for the Selection of Polysulfide Adsorbents Toward High‐Performance Lithium‐Sulfur Batteries

Preparation of a NbN/graphene nanocomposite by solution impregnation and its application in high-performance Li-ion hybrid capacitors

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