Understanding the fast lithium storage performance of hydrogenated TiO2 nanoparticles

Yan, Yonggao; Hao, Bo; Wang, Dong; Ge, Chao; Markweg, Eric; Albrecht, Arne; Schaaf, Peter

doi:10.1039/c3ta13491a

Cited by 154 publications

(86 citation statements)

References 31 publications

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“…Besides the outstanding photocatalysis performances, the black TiO 2 nanomaterials were also demonstrated to be promising in other new applications, including lithium batteries, [ 29,33,46,59,72,157 ] supercapacitors, [ 80,82,122,158 ] catalysis for polymerization, [ 159 ] photothermal application, [ 62,160 ] fuel cells, [ 161 ] fi eld emission electrodes, [ 55,121 ] and microwave absorption. Some structural or chemical modifi cations are observed in the black TiO 2 , such as surface disordered structure, oxygen vacancy/Ti 3+ , hydroxyl groups and Ti-H bonds (H-doping), depending on the different synthetic methods.…”

Section: Discussionmentioning

confidence: 99%

“…[ 71 ] Additionally, black anatase TiO 2 nanoparticles, [ 72 ] blue (111)facet exposed TiO 2 nanosheets with Exposed (001), [ 73,74 ] hydrogenate TiO 2 fi lm [ 75 ] and black TiO 2 nanofi ber [ 76 ] were also successfully obtained by H 2 plasma treatment. [ 71 ] Additionally, black anatase TiO 2 nanoparticles, [ 72 ] blue (111)facet exposed TiO 2 nanosheets with Exposed (001), [ 73,74 ] hydrogenate TiO 2 fi lm [ 75 ] and black TiO 2 nanofi ber [ 76 ] were also successfully obtained by H 2 plasma treatment.…”

Section: Wileyonlinelibrarycommentioning

confidence: 96%

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Progress in Black Titania: A New Material for Advanced Photocatalysis

Liu

Zhu

Wang

et al. 2016

Advanced Energy Materials

288

190

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excited charges should separate from each other and migrate to the surface to perform photocatalytic reactions, before they are annihilated in the recombination process. [ 3,17,18 ] Nevertheless, TiO 2 has a wide bandgap of 3.0−3.2 eV for the three common natural polymorphs -anatase, rutile and brookite. [ 8 ] That limits the optical absorption of TiO 2 in the ultraviolet (UV) region of the solar spectrum, resulting in insuffi cient utilization of solar energy (less than 5%). Another hurdle for TiO 2 material in the photo-chemical applications is its low quantum effi ciency that results from its high recombination of photo-generated electron-hole pairs. [ 16,18 ] Therefore, improving the optical absorption properties and reducing electron-hole recombination of TiO 2 are expected to be signifi cant for superior photoactivity.Various strategies have been adopted to tune TiO 2 's optical and electronic properties to improve its visible-light photoactivity. For example, metal ions (Co, Ni, Mn, Fe, Cr, …) or non-metal ions (N, S, C, I, …) are doped in the titania matrix to induce mid-gap states or to narrow the bandgap of TiO 2 , aiming to enhance its visible-light response. [ 3,17 ] Doping with open-shell metals is claimed to be benefi cial for red-shifting TiO 2 photochemistry into the visible, while closed shell cation dopants have no photochemical benefi t. Some d -block transition metal doping often generates deeply localized d -states in the forbidden bandgap of TiO 2 and results in recombination centers for carriers. [ 3,19 ] For the incorporation of non-metal ions, heavy doping is always diffi cult due to the large differences in chemistry between the alien ions and O 2− in titania, thus the visible light absorption is not signifi cantly enhanced. [ 20 ] Dye-sensitized or noble metal nanodots decorated TiO 2 nanostructures have been largely designed to enhanced its optical properties and to improve the charge separation effi ciency. [ 6,9,15,17,21 ] Additionally, charge separation in TiO 2 is believed to be effi ciently improved by forming heterojunctions with other semiconductors, such as metal oxides and chalcogenides. [ 6,22 ] In 2011, a hydrogenated black titania with a narrowed bandgap of ≈1.5 eV was reported to boost the full spectrum sunlight absorption and the photocatalytic activity. [ 23 ] This discovery has triggered world-wide scientifi c interests in black TiO 2 nanomaterials. [ 8 ] Black TiO 2 is featured by selfstructural modifi cations, involving self-doped Ti 3+ /oxygen vacancy, or incorporation of H-doping. [ 5,8 ] Owing to these modifi cations, their crystal and electronic structures as well as the surface property are signifi cantly changed, and the most marked effect is the color changing. The intrinsic TiO 2The photocatalytic activity of TiO 2 has aroused a broad range of research effort since 1972. Although TiO 2 has a very high effi ciency in utilizing ultraviolet light, its overall solar activity is very limited due to its wide bandgap (≈3.0−3.2 eV). This is a bottleneck for TiO 2 to...

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Section: Discussionmentioning

confidence: 99%

Section: Wileyonlinelibrarycommentioning

confidence: 96%

Progress in Black Titania: A New Material for Advanced Photocatalysis

Liu

Zhu

Wang

et al. 2016

Advanced Energy Materials

288

190

View full text Add to dashboard Cite

show abstract

“…280 Their cyclic voltammetry analysis revealed that the improved rate capability resulted from the enhanced contribution of pseudocapacitive lithium storage on the particle surface, possibly due to the combined effect of the disordered surface layers and Ti 3+ species of H-TiO 2 . 280 6.1.3. Supercapacitor.…”

Section: Self-structural Modifications In Amorphous/disordered Phasesmentioning

confidence: 99%

Titanium Dioxide Nanomaterials: Self-Structural Modifications

2014

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“…34 The detailed Li storage mechanism can be further studied by the CVs (Fig. S5 †) at different scan rates, 35 which demonstrate that it is a mixed process involving both Li + doping into the polymer chains and absorbing on the surfaces/ interfaces. It is worth noting that at a current density of 20 mA g À1 the reversible capacity could be up to 1042 mA h g À1 aer 5 cycles as shown in Fig.…”

Section: Electrochemical Performance Of Pdczbt For LI Storagementioning

confidence: 99%

Conjugated microporous polymers with excellent electrochemical performance for lithium and sodium storage

et al. 2015

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Conjugated microporous polymers, which exhibit high specific capacity, superior cycle stability and remarkable rate capability, are explored as high-performance electrode materials for lithium and sodium storage. Their excellent electrochemical performance can be attributed to their conductive frameworks, plentiful redox-active units, high specific surface area and homogeneous microporous structure.In an effort to address the energy crisis and environmental issues, clean and sustainable energy systems have been investigated, such as solar cells, fuel cells and rechargeable batteries. Currently, lithium ion batteries (LIBs) dominate the portable consumer electronic market due to their high energy density.

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Understanding the fast lithium storage performance of hydrogenated TiO2 nanoparticles

Cited by 154 publications

References 31 publications

Progress in Black Titania: A New Material for Advanced Photocatalysis

Progress in Black Titania: A New Material for Advanced Photocatalysis

Titanium Dioxide Nanomaterials: Self-Structural Modifications

Conjugated microporous polymers with excellent electrochemical performance for lithium and sodium storage

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