Ultrafast sodium storage in anatase TiO2 nanoparticles embedded on carbon nanotubes

Hwang, Jang Yeon; Lee, Joo Hyeong; Abouimrane, Ali; Belharouak, Ilias; Sun, Yang Kook

doi:10.1016/j.nanoen.2015.06.017

Cited by 133 publications

(72 citation statements)

References 47 publications

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“…First-principle calculation suggests that the excellent cyclability and rate capability are attributed to the reduced energy barrier and the unique synergetic effects between TiO2 nanoparticles and the rGO substrate. 61 The formation of Ti 3+ and the CNTs helps to improve the electronic conductivity, and meanwhile the structure remains even at a high rate. N-doped TiO2 nanorods supported with carbon dots were synthesized via a facile hydrothermal route.…”

Section: Tio2mentioning

confidence: 99%

Nanostructured Ti-based anode materials for Na-ion batteries

2016

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With the shortage of fossil energy and global climate change, renewable energy sources offer the most promise to these challenges. However, the intermittence of energy sources such as solar and wind requires sustainable energy-storage technologies. Nowadays, electrochemical energy-storage technologies and applications have attracted much attention, including portable electric devices, electric vehicles and smart power grids.Lithium-ion batteries (LIBs) have been widely applied in these areas because of their safety, portability and high energy density. Nevertheless, the resources of lithium are limited and the vast consumption of lithium has pushed up the price of lithium compounds, urging people to search for resourceful materials. Sodium can be a promising alternative for its high abundance and low cost. Furthermore, titanium-based materials have become a hotspot of anode materials in sodium-ion batteries (SIBs), taking advantages of their high 2 safety and structural stability. In this review, we summarize the recent advances on Tibased anode materials for SIB applications. We highlight the design and engineering of the Ti-based nanoarchitectures, especially emphasize on the effective enhancement in performance and the related sodium-storage mechanism. 3 elements on earth. Sodium becomes a suitable candidate due to the high abundance and low cost as well as the similar redox potential to lithium (ENa+/Na = -2.7 V versus standard hydrogen electrode, only 0.3 V above that of lithium). In fact, the research on sodium-ion batteries (SIBs) is not newly developed. The discovery of high-temperature solid-state sodium conductors shed light on sodium electrochemistry. 3 After that, sodium batteries operating at high temperature attracted much attention with the discovery of NASICON. 4 Several decades later, along with the investigation of LIBs in the 1980s, the concept of SIBs was put forward. 5 Whereas LIBs received rapid progress and advanced technology, SIBs faded out researchers' sight gradually.In the past few years, ambient-temperature SIBs with intercalation materials have gone through a revitalization due to the sustainable advantages and large-scale applications.Plenty of cathodes for SIBs have been studied while suitable anode materials are quite limited. 6, 7 Although graphite is widely used as the anode in commercialized LIBs, it shows poor capacity performance in SIBs. Attempts have been made to modify graphite, but there are still some problems demanding solutions. 8 Ti-based materials, including titanium dioxide and a series of Ti-containing compounds, have been widely investigated in photocatalysis, solar cells, and water splitting. In particular, owing to the exceptional chemical durability and crystalline structural diversity, Ti-based materials such as TiO2 [9][10][11][12][13][14][15][16] and Li4Ti5O12 17-20 have now been recently explored in energy-storage areas. In this review, we focus on the recent progress on nanostructured Ti-based anode materials for SIBs. The enhanced performances through ...

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Section: Tio2mentioning

confidence: 99%

Nanostructured Ti-based anode materials for Na-ion batteries

2016

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“…35-38 75 Carbon coating is an effective way to improve the electrical conductivity and electrochemical performance of TiO 2 . [35][36][37][38][39][40][41][42] Typically, Passerini's group obtained carbon coated TiO 2 nanoparticles by an in situ polymer functionalization method. A reversible capacity of 227 mA h g -1 was gained after 300 cycles at a current density of 33.5 mA g -1 , which was significantly improved compared with that of their previous reported TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Improved sodium-ion storage performance of TiO₂nanotubes by Ni²⁺doping

Yan

et al. 2016

J. Mater. Chem. A

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TiO 2 is a promising applicable anode for sodium-ion batteries (SIBs) due to its inherent safety, low cost, good structural stability during sodium-ion storage process and appropriate voltage platform. However, unsatisfied electrical conductivity hinders its application. Here we demonstrate that doping of TiO 2 nanotubes with Ni 2+ via an initial sol-gel method, subsequent hydrothermal process and final thermal 10 treatment, which can balance the high conductivity and good structural stability of TiO 2 to improve the sodium-ion storage performance. The resultant sample exhibits a high charge capacity of 286 mA h g -1 after 100 cycles at a current density of 50 mA g -1 and even at a high current density of 5 A g -1 , a capacity of 123 mA h g -1 is maintained after 2000 cycles. It is believed that the strategy in this work can provide a useful pathway towards enhancing the electrochemical performance of TiO 2 anode for SIBs.

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“…Furthermore, the sodium‐storage capabilities of TiO 2 in elevated rates remain hindered by its considerably low intrinsic electronic conductivity (≈10 −12 S cm −1 ). Conductive carbon like CNTs, graphene, carbon nanodots, amorphous carbon has been introduced to support or decorate the crystalline TiO 2 , in which the distribution of carbon plays an important part to the outcomes of electrochemical performances. It is notable that carbon‐coating method holds the superiorities of achieving high conductivity for TiO 2 /carbon composites with a small quantity of less‐costly carbon layer by conformably wrapping on TiO 2 , rather than the relatively poor interfacial compatibility for the TiO 2 loaded on CNTs or graphene scaffolds of larger amount proportions and higher cost.…”

Section: Introductionmentioning

confidence: 99%

Size‐Tunable Olive‐Like Anatase TiO₂ Coated with Carbon as Superior Anode for Sodium‐Ion Batteries

Zhang

Zou

Huang

et al. 2016

Small

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Olive-shaped anatase TiO with tunable sizes in nanoscale are designed employing polyvinyl alcohol (PVA) as structure directing agents to exert dramatic impacts on structure shaping and size manipulation. Notably, the introduced PVA simultaneously serves as carbon sources, bringing about a homogenous carbon layer with intimate coupling interfaces for boosted electronic conductivity. Constructed from tiny crystalline grains, the uniformly dispersed carbon-coated TiO nano-olives (TOC) possess subtle loose structure internally for prompt Na transportations. When utilized for sodium-ion storage, the size effects are increasingly significant at high charge-discharge rates, leading to the much superior rate performances of TOC with the smallest size. Bestowed by the improved Na adsorption and diffusion kinetics together with the promoted electron transfer, it delivers a high specific capacity of 267 mAh g at 0.1 C (33.6 mA g ) and sustains 110 mAh g at a rather high rate of 20 C. Even after cycled at 10 C over 1000 cycles, a considerable capacity of 125 mAh g with a retention of 94.6% is still obtained, highlighting its marvelous long-term cyclability and high-rate capabilities.

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Ultrafast sodium storage in anatase TiO2 nanoparticles embedded on carbon nanotubes

Cited by 133 publications

References 47 publications

Nanostructured Ti-based anode materials for Na-ion batteries

Nanostructured Ti-based anode materials for Na-ion batteries

Improved sodium-ion storage performance of TiO₂nanotubes by Ni²⁺doping

Size‐Tunable Olive‐Like Anatase TiO₂ Coated with Carbon as Superior Anode for Sodium‐Ion Batteries

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Ultrafast sodium storage in anatase TiO2 nanoparticles embedded on carbon nanotubes

Cited by 133 publications

References 47 publications

Nanostructured Ti-based anode materials for Na-ion batteries

Nanostructured Ti-based anode materials for Na-ion batteries

Improved sodium-ion storage performance of TiO2nanotubes by Ni2+doping

Size‐Tunable Olive‐Like Anatase TiO2 Coated with Carbon as Superior Anode for Sodium‐Ion Batteries

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Improved sodium-ion storage performance of TiO₂nanotubes by Ni²⁺doping

Size‐Tunable Olive‐Like Anatase TiO₂ Coated with Carbon as Superior Anode for Sodium‐Ion Batteries