Browse
Submit Data
Databases
API
Help

Dataset Information

55 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Heterogeneous TiO₂@Nb₂O₅ composite as a high-performance anode for lithium-ion batteries.

ABSTRACT: Heterogeneous TiO₂@Nb₂O₅ composites, in which TiO₂ nanoparticles were evenly embedded on ultrathin Nb₂O₅ nanosheets, were used as anode materials for LIBs and demonstrated high capacities and excellent rate capability. For instance, this material displayed large capacities of 166.3 and 129.1?mA?h g^-1 at current densities of 1?A?g^-1 after 100 cycles and 5?A?g^-1 after 300 cycles, respectively.

SUBMITTER: Liu Y

PROVIDER: S-EPMC5543047 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature

ACCESS DATA

Json Xml

Publications

Heterogeneous TiO2@Nb2O5 composite as a high-performance anode for lithium-ion batteries.

Liu Yubin Y Lin Liwei L Zhang Weifeng W Wei Mingdeng M

Scientific reports 20170803 1

Heterogeneous TiO2@Nb2O5 composites, in which TiO2 nanoparticles were evenly embedded on ultrathin Nb2O5 nanosheets, were used as anode materials for LIBs and demonstrated high capacities and excellent rate capability. For instance, this material displayed large capacities of 166.3 and 129.1 mA h g-1 at current densities of 1 A g-1 after 100 cycles and 5 A g-1 after 300 cycles, respectively. ...[more]

PMID: 28775363

Similar Datasets

TiO2 nanotubes wrapped with reduced graphene oxide as a high-performance anode material for lithium-ion batteries.

Project description:Through electrostatic interaction and high-temperature reduction methods, rGO was closely coated onto the surface of TiO2 nanotubes. Even at a high temperature of 700 °C, the nanotube morphology of TiO2 (anatase) was preserved because of the assistance of rGO, which provides a framework that prevents the tubes from breaking into particles and undergoing a phase transformation. The rGO/TiO2 nanotubes deliver a high capacity (263 mAh g-1 at the end of 100 cycles at 0.1 A g-1), excellent rate performance (151 mAh g-1 at 2 A g-1 and 102 mAh g-1 at 5 A g-1), and good cycle stability (206 mAh g-1 after 500 cycles at 0.5 A g-1). These characteristics arise from the GO/TiO2 nanotubes' advanced structure. First, the closely coated rGO and Ti3+ in the tubes give rise to a high electro-conductivity of the nanotubes. Additionally, the Li+ ions can rapidly transfer into the electrode via the nanotubes' empty inner diameter and short tube wall.

| S-EPMC5093559 | biostudies-literature

Ternary CNTs@TiO?/CoO Nanotube Composites: Improved Anode Materials for High Performance Lithium Ion Batteries.

Project description:TiO? nanotubes (NTs) synthesized by electrochemical anodization are discussed as very promising anodes for lithium ion batteries, owing to their high structural stability, high surface area, safety, and low production cost. However, their poor electronic conductivity and low Li? ion diffusivity are the main drawbacks that prevent them from achieving high electrochemical performance. Herein, we report the fabrication of a novel ternary carbon nanotubes (CNTs)@TiO?/CoO nanotubes composite by a two-step synthesis method. The preparation includes an initial anodic fabrication of well-ordered TiO?/CoO NTs from a Ti-Co alloy, followed by growing of CNTs horizontally on the top of the oxide films using a simple spray pyrolysis technique. The unique 1D structure of such a hybrid nanostructure with the inclusion of CNTs demonstrates significantly enhanced areal capacity and rate performances compared to pure TiO? and TiO?/CoO NTs, without CNTs tested under identical conditions. The findings reveal that CNTs provide a highly conductive network that improves Li? ion diffusivity, promoting a strongly favored lithium insertion into the TiO?/CoO NT framework, and hence resulting in high capacity and an extremely reproducible high rate capability.

| S-EPMC5554059 | biostudies-literature

A stable TiO2-graphene nanocomposite anode with high rate capability for lithium-ion batteries.

Project description:A rapid microwave hydrothermal process is adopted for the synthesis of titanium dioxide and reduced graphene oxide nanocomposites as high-performance anode materials for Li-ion batteries. With the assistance of hydrazine hydrate as a reducing agent, graphene oxide was reduced while TiO2 nanoparticles were grown in situ on the nanosheets to obtain the nanocomposite material. The morphology of the nanocomposite obtained consisted of TiO2 particles with a size of ∼100 nm, uniformly distributed on the reduced graphene oxide nanosheets. The as-prepared TiO2-graphene nanocomposite was able to deliver a capacity of 250 mA h g-1 ± 5% at 0.2C for more than 200 cycles with remarkably stable cycle life during the Li+ insertion/extraction process. In terms of high rate capability performance, the nanocomposite delivered discharge capacity of ca. 100 mA h g-1 with >99% coulombic efficiency at C-rates of up to 20C. The enhanced electrochemical performance of the material in terms of high rate capability and cycling stability indicates that the as-developed TiO2-rGO nanocomposites are promising electrode materials for future Li-ion batteries.

| S-EPMC9056293 | biostudies-literature

Bulk-Like SnO2-Fe2O3@Carbon Composite as a High-Performance Anode for Lithium Ion Batteries.

Project description:Boosted power handling and the reduced charging duration of Li ion cells critically rests with ionic/electronic mobility. Ion mobility in electrochemically relevant grains normally stands for an essential restriction of the velocity at which the energy of a cell can be stored/released. To offset sluggish solid-state ionic transport and achieve a superior power/energy density rating, electroactive grains often need exquisite nanoscaling, harming crucial virtues on volumetric packing density, tractability, sustainability, durability, and cost. Unlike elaborate nanostructuring, here we describe that a SnO2-Fe2O3@carbon composite-which adopts a metal oxide particles-intercalated bulk-like configuration-can insert many Li+ ions at elevated speeds, despite its micro-dimensionality. Analysis of charge transport kinetics in this tailor-made architecture unveils both much improved ion travel through compact monolithic substances and the greatly enhanced ion access to surfaces of SnO2/Fe2O3 grains. According to the well-studied battery degradation mechanism, it is that both the effective stress management and internal electric field in our as-prepared sample that result in recommendable capacity, rate behavior, and cyclic lifespan (exhibiting a high reversible capacity of 927 mAh g-1 at 0.2 A g-1 with a capacity retention of 95.1% after 100 cycles and an ultra-stable capacity of 429 mAh g-1 even over 1800 cycles at 3 A g-1). Unique materials and working rationale which ensure the swift (de)lithiation of such micrometer-dimensional monoliths may open a door for various high-power/density usages.

| S-EPMC7075132 | biostudies-literature

An investigation of Li2TiO3-coke composite anode material for Li-ion batteries.

Project description:Anode material Li2TiO3-coke was prepared and tested for lithium-ion batteries. The as-prepared material exhibits excellent cycling stability and outstanding rate performance. Charge/discharge capacities of 266 mA h g-1 at 0.100 A g-1 and 200 mA h g-1 at 1.000 A g-1 are reached for Li2TiO3-coke. A cycling life-time test shows that Li2TiO3-coke gives a specific capacity of 264 mA h g-1 at 0.300 A g-1 and a capacity retention of 92% after 1000 cycles of charge/discharge.

| S-EPMC9064618 | biostudies-literature

Ultrasmall Fe2O3 nanoparticles/MoS2 nanosheets composite as high-performance anode material for lithium ion batteries.

Project description:Coupling ultrasmall Fe2O3 particles (~4.0 nm) with the MoS2 nanosheets is achieved by a facile method for high-performance anode material for Li-ion battery. MoS2 nanosheets in the composite can serve as scaffolds, efficiently buffering the large volume change of Fe2O3 during charge/discharge process, whereas the ultrasmall Fe2O3 nanoparticles mainly provide the specific capacity. Due to bigger surface area and larger pore volume as well as strong coupling between Fe2O3 particles and MoS2 nanosheets, the composite exhibits superior electrochemical properties to MoS2, Fe2O3 and the physical mixture Fe2O3+MoS2. Typically, after 140 cycles the reversible capacity of the composite does not decay, but increases from 829 mA h g-1 to 864 mA h g-1 at a high current density of 2 A g-1. Thus, the present facile strategy could open a way for development of cost-efficient anode material with high-performance for large-scale energy conversion and storage systems.

| S-EPMC5316998 | biostudies-literature

Sn-Doped Rutile TiO2 Hollow Nanocrystals with Enhanced Lithium-Ion Batteries Performance.

Project description:Hollow structures and doping of rutile TiO2 are generally believed to be effective ways to enhance the performance of lithium-ion batteries. Herein, uniformly distributed Sn-doped rutile TiO2 hollow nanocrystals have been synthesized by a simple template-free hydrothermal method. A topotactic transformation mechanism of solid TiOF2 precursor is proposed to illustrate the formation of rutile TiO2 hollow nanocrystals. Then, the Sn-doped rutile TiO2 hollow nanocrystals are calcined and tested as anode in the lithium-ion battery. They deliver a highly reversible specific capacity of 251.3 mA h g-1 at 0.1 A g-1 and retain ∼110 mA h g-1 after 500 cycles at a high current rate 5 A g-1 (30 C), which is much higher than most of the reported work.

| S-EPMC6641342 | biostudies-literature

Hierarchical non-woven fabric NiO/TiO2 film as an efficient anode material for lithium-ion batteries.

Project description:Hierarchical non-woven fabric NiO/TiO2 film is prepared using a facile two-step synthesis by electrospinning and subsequent hydrothermal reaction to yield TiO2 film decorated with NiO nanosheets. As an anode material for Li-ion batteries, the NiO/TiO2 composite exhibits discharge and charge capacities of 1251.3 and 1284.3 mA h g-1, with good cycling performance and rate capability. Characterization shows that the NiO nanosheets are distributed on the surface of the TiO2 nanofibers. The total specific capacity of NiO/TiO2 is higher than the sum of pure TiO2 and NiO, indicating a positive synergistic effect of TiO2 and NiO on the improvement of electrochemical performance. The results suggest that non-woven fabric NiO/TiO2 film is a promising anode material for lithium ion batteries.

| S-EPMC9069587 | biostudies-literature

Molecular Spring Enabled High-Performance Anode for Lithium Ion Batteries.

Project description:Flexible butyl interconnection segments are synthetically incorporated into an electronically conductive poly(pyrene methacrylate) homopolymer and its copolymer. The insertion of butyl segment makes the pyrene polymer more flexible, and can better accommodate deformation. This new class of flexible and conductive polymers can be used as a polymer binder and adhesive to facilitate the electrochemical performance of a silicon/graphene composite anode material for lithium ion battery application. They act like a "spring" to maintain the electrode mechanical and electrical integrity. High mass loading and high areal capacity, which are critical design requirements of high energy batteries, have been achieved in the electrodes composed of the novel binders and silicon/graphene composite material. A remarkable area capacity of over 5 mAh/cm² and volumetric capacity of over 1700 Ah/L have been reached at a high current rate of 333 mA/g.

| S-EPMC6418860 | biostudies-literature

Atomic layer deposition of ZnO/TiO2 nanolaminates as ultra-long life anode material for lithium-ion batteries.

Project description:In this work, we designed ZnO/TiO2 nanolaminates by atomic layer deposition (ALD) as anode material for lithium ion batteries. ZnO/TiO2 nanolaminates were fabricated on copper foil by depositing unit of 26 cycles ZnO/26 cycles TiO2 repeatedly using ALD. ZnO/TiO2 nanolaminates are much more stable than pristine ZnO films during electrochemical cycling process. Therefore, ZnO/TiO2 nanolaminates exhibit excellent lithium storage performance with an improved cycling performance and superior rate capability compared to pristine ZnO films. Moreover, coulombic efficiency (CE) of ZnO/TiO2 nanolaminates is above 99%, which is much higher than the value of pristine ZnO films. Excellent ultralong-life performance is gained for ZnO/TiO2 nanolaminates, retaining a reversible capacity of ~667 mAh g-1 within cut-off voltage of 0.05-2.5 V after 1200 cycles of charge-discharge at 500 mA g-1. Constructing nanolaminates structures via ALD might open up new opportunities for improving the performance of anode materials with large volume expansion in lithium ion batteries.

| S-EPMC6687889 | biostudies-literature