Photocatalysis and Li-Ion Battery Applications of {001} Faceted Anatase TiO2-Based Composites

Anatase TiO2 are the most widely used photocatalysts because of their unique electronic, optical and catalytic properties. Surface chemistry plays a very important role in the various applications of anatase TiO2 especially in the catalysis, photocatalysis, energy conversion and energy storage. Control of the surface structure by crystal facet engineering has become an important strategy for tuning and optimizing the physicochemical properties of TiO2. For anatase TiO2, the {001} crystal facets are the most reactive because they exhibit unique surface characteristics such as visible light responsiveness, dissociative adsorption, efficient charge separation capabilities and photocatalytic selectivity. In this review, a concise survey of the literature in the field of {001} dominated anatase TiO2 crystals and their composites is presented. To begin, the existing strategies for the synthesis of {001} dominated anatase TiO2 and their composites are discussed. These synthesis strategies include both fluorine-mediated and fluorine-free synthesis routes. Then, a detailed account of the effect of {001} facets on the physicochemical properties of TiO2 and their composites are reviewed, with a particular focus on photocatalysis and Li-ion batteries applications. Finally, an outlook is given on future strategies discussing the remaining challenges for the development of {001} dominated TiO2 nanomaterials and their potential applications.

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Progress and perspectives on halide lithium conductors for all-solid-state lithium batteries

Energy & Environmental Science ◽

10.1039/c9ee03828k ◽

2020 ◽

Vol 13 (5) ◽

pp. 1429-1461 ◽

Cited By ~ 21

Author(s):

Xiaona Li ◽

Jianwen Liang ◽

Xiaofei Yang ◽

Keegan R. Adair ◽

Changhong Wang ◽

...

Keyword(s):

Energy Storage ◽

Solid State ◽

Lithium Batteries ◽

Electrochemical Stability ◽

Superionic Conductors ◽

Fundamental Understanding ◽

Potential Applications ◽

Synthesis Routes

This review focuses on fundamental understanding, various synthesis routes, chemical/electrochemical stability of halide-based lithium superionic conductors, and their potential applications in energy storage as well as related challenges.

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Ether‐functionalized Pyrrolidinium‐based Room Temperature Ionic Liquids: Physicochemical Properties, Molecular Dynamics, and the Li ion Coordination Environment

ChemPhysChem ◽

10.1002/cphc.202100380 ◽

2021 ◽

Author(s):

Kazuki Yoshii ◽

Takuya Uto ◽

Takakazu Onishi ◽

Daichi Kosuga ◽

Naoki Tachikawa ◽

...

Keyword(s):

Molecular Dynamics ◽

Ionic Liquids ◽

Physicochemical Properties ◽

Room Temperature ◽

Room Temperature Ionic Liquids ◽

Coordination Environment ◽

Li Ion

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Performance Impacts of Tailored Surface Geometry in Li-Ion Battery Cathodes

Volume 6A: Energy ◽

10.1115/imece2013-65230 ◽

2013 ◽

Author(s):

George J. Nelson

Keyword(s):

Surface Area ◽

Solid Phase ◽

Particle Surface ◽

Surface Characteristics ◽

Analytical Models ◽

Li Ion Battery ◽

Fractal Structures ◽

Surface Geometry ◽

Trade Offs ◽

Li Ion

Analytical models developed to investigate charge transfer in Li-ion battery cathodes reveal distinct transport regimes where performance may be limited by either microstructural surface characteristics or solid phase geometry. For several cathode materials, particularly those employing conductive additives, surface characteristics are expected to drive these performance limitations. For such electrodes gains in performance may be achieved by modifying surface geometry to increase surface area. However, added surface area may present a diminishing return if complex structures restrict access to electrochemically active interfaces. A series of parametric studies has been performed to better ascertain the merits of complex, tailored surfaces in Li-ion battery cathodes. The interaction between lithium transport and surface geometry is explored using a finite element model in which complex surfaces are simulated with fractal structures. Analysis of transport in these controlled structures permits assessment of scaling behavior related to surface complexity and provides insight into trade-offs in tailoring particle surface geometry.

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Preparation of alginate hydrogel microparticles by gelation introducing cross-linkers using droplet-based microfluidics: a review of methods

Biomaterials Research ◽

10.1186/s40824-021-00243-5 ◽

2021 ◽

Vol 25 (1) ◽

Author(s):

Cheng Zhang ◽

Romain Grossier ◽

Nadine Candoni ◽

Stéphane Veesler

Keyword(s):

Mechanical Properties ◽

Physicochemical Properties ◽

Ease Of Use ◽

Narrow Size Distribution ◽

Future Perspectives ◽

Alginate Hydrogel ◽

Hydrogel Microparticles ◽

Potential Applications ◽

Excellent Control ◽

On Chip

AbstractThis review examines the preparation of alginate hydrogel microparticles by using droplet-based microfluidics, a technique widely employed for its ease of use and excellent control of physicochemical properties, with narrow size distribution. The gelation of alginate is realized “on-chip” and/or “off-chip”, depending on where cross-linkers are introduced. Various strategies are described and compared. Microparticle properties such as size, shape, concentration, stability and mechanical properties are discussed. Finally, we consider future perspectives for the preparation of hydrogel microparticles and their potential applications.

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Cu-ion induced self-polymerization of Cu phthalocyanine to prepare low-cost organic cathode materials for Li-ion batteries with ultra-high voltage and ultra-fast rate capability

Journal of Materials Chemistry A ◽

10.1039/d1ta07742b ◽

2021 ◽

Author(s):

Haichang Zhang ◽

Rui Zhang ◽

Xingjiang Liu ◽

Fei Ding ◽

Chunsheng Shi ◽

...

Keyword(s):

High Voltage ◽

Cathode Materials ◽

Fast Rate ◽

Low Cost ◽

Rate Capability ◽

Li Ion Batteries ◽

Practical Application ◽

Battery Materials ◽

Li Ion ◽

Synthesis Routes

High cost, complex synthesis routes and low yield are pressing challenges hindering the practical application of organic battery materials. Herein, copper(II) phthalocyanine (CuPc), one of the most frequently used blue...

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Synthesis and Characterization of Empty Silicon Clathrates for Anode Applications in Li-ion Batteries

MRS Advances ◽

10.1557/adv.2016.434 ◽

2016 ◽

Vol 1 (45) ◽

pp. 3043-3048 ◽

Cited By ~ 3

Author(s):

Kwai S. Chan ◽

Michael A. Miller ◽

Carol Ellis-Terrell ◽

Candace K. Chan

Keyword(s):

Coulombic Efficiency ◽

Synthesis Method ◽

Li Ion Batteries ◽

Solution Synthesis ◽

Silicon Clathrates ◽

Potential Applications ◽

Li Ion ◽

Lower Capacity

ABSTRACTSeveral processing methods were developed and evaluated for synthesizing empty silicon clathrates. A solution synthesis method based on the Hofmann-elimination oxidation reaction was successfully utilized to produce 20 mg of empty Si46. Half-cells using the Si46 electrodes were successfully cycled for 1000 cycles at rate of 5.3C. The capacity of the Si46 electrode in long-term tests was 675 mAh/g at the 4th cycle, but increased to 809 mAh/g at 50 cycles. The corresponding Coulombic efficiency was better than 99%. The capacity dropped from 809 to 553 mAh/g after 1000 cycles while maintaining a 99% Coulombic efficiency. In comparison, a Ba8Al8Si38 electrode could be cycled for about 200 cycles with a lower capacity and Coulombic efficiency. Potential applications of empty silicon clathrates as anode materials in Li-ion batteries are discussed.

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Conformal Electroless Copper and Nickel Deposition on Mems Structures

MRS Proceedings ◽

10.1557/proc-546-139 ◽

1998 ◽

Vol 546 ◽

Cited By ~ 1

Author(s):

Hercules P. Neves ◽

Thomas D. Kudrle ◽

Jia-Ming Chen ◽

Scott G. Adams ◽

Michel Maharbiz ◽

...

Keyword(s):

Microelectromechanical Systems ◽

Chemical Activation ◽

Surface Characteristics ◽

Nickel Deposition ◽

Electrical Isolation ◽

Electroless Metallization ◽

Potential Applications ◽

Film Roughness ◽

Seed Layers ◽

The Ideal

AbstractWe propose electroless metallization as a method for conformal metal deposition microelectromechanical systems (MEMS). The intrinsically conformal nature of electroless deposition makes it ideal for coating high aspect ratio (greater than 50:1) structures frequently fabricated with micromachining techniques We take advantage of the selective nature of the deposition to obtain self-aligned electrical isolation. We minimize the metal film roughness for potential applications in RF and optics. Given the specific MEMS metallization requirements, we determined the ideal concentrations of additives and surfactants in order to provide good electrical isolation, low roughness and high film reliability. Our depositions were done using seed layers as well as through direct chemical activation of the silicon surface. Characteristics such as resistivity [ 1 ], morphology [ 1 ], microstructure [ 2 ], and electrochemical behavior [ 3 ] have already been reported in the literature; our paper is focused on the specific requirements for MEMS applications.

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