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Primeur weekly 2018-07-03

Quantum computing

Scientists pump up chances for quantum computing ...

CEA uses Atos simulator at the CCRT to explore the potential of quantum computing in industry ...

Focus on Europe

European parliament votes in favour of EuroHPC JU ...

European Commission welcomes Parliament vote on plans to establish EuroHPC JU ...

Report European Investment Bank: Financing the future of supercomputing - How to increase investments in high performance computing in Europe ...

Looking back on a successful PRACEdays18 ...

Middleware

Aerodynamic science reveals the best position in a peloton of 121 cyclists and calculates unexpected drag reduction for the athletes thanks to the largest simulation ever done in sport ...

Hardware

WatermelonBlock Partners with IBM Watson using its Supercomputer to let crypto investors know what the market is thinking ...

Tech Automotive Leaders Join Forces on Next-Generation In-Vehicle Networking Technologies for Autonomous and Connected Vehicles ...

Chayora Celebrates Major Milestone as It Nears Completion of Phase 1 of Its First Facility at Its Tianjin Hyperscale Data Centre Campus in China ...

Indian Institute of Technology Bombay deploys Cray to Power Research and Education ...

Lisa Compute Cluster expanded with GPUs for machine learning ...

Mellanox announces agreement with Starboard ...

Applications

Simulation for grid transmission and distribution ...

Futuristic data storage ...

GA4GH streaming API htsget a bridge to the future for modern genomic data processing ...

Department of Energy taps Argonne to lead effort focused on energy-water systems ...

Researchers discover new enzyme paradigm for critical reaction in converting lignin to useful produce useful products ...

SenseTime debuts in Singapore by signing MOU with local giants NTU, NSCC and Singtel ...

New simulations break down potential impact of a major quake by building location and size ...

AI learns the art of debate ...

Tiny sensors may help avert earthquake damage, track sonar danger, "listen" to pipelines ...

BNAs improve performance of Li-ion batteries ...

RUDN chemists have completely changed the direction of Diels-Alder reaction ...

UMass Amherst geoscientists offer new evidence for how the Adirondack Mountains formed ...

A galactic test will clarify the existence of dark matter ...

The Cloud

HPE accelerates data insight and action across the enterprise with latest Edgeline capabilities ...

Hewlett Packard Enterprise commits $4 billion to accelerate the Intelligent Edge ...

BNAs improve performance of Li-ion batteries


Fig. (a) are the galvanostatic charge-discharge curves of BNAs integrated electrode at a current density of 25 [I]μ[/I]A cm-2 . The 1st, 2nd discharge capacities of BNAs integrated electrode are 2471.5, 2311.7 [I]μ[/I]Ah·cm-2 (1861.8, 1741.4 mAh g-1). Fig. (b) reveals the rate capability of BNAs integrated electrode at current densities of 250, 500, 1000, 2000, 5000 [I]μ[/I]Ah·cm-2 respectively. The discharge capacities are 1219, 1128, 972, 678, 430 [I]μ[/I]Ah·cm-2 (918.2, 849.7, 732.2, 510.7, 323.9 mAh g-1), respectively. Fig. (c) shows the cycling stability of BNAs integrated electrodes. Reversible capacity of BNAs integrated electrodes can maintain a capacity of 410 [I]μ[/I]Ah·cm-2 (308.8 mAh g-1, at a current density of 320 [I]μ[/I]Ah·cm-2) after 600 cycles. When the current density was 75 [I]μ[/I]Ah·cm-2, the electrode exhibits a high capacity of 600 [I]μ[/I]Ah·cm-2 (451.9 mAh g-1) after 500 cycles. The above results show that the integration of active material and current collector can greatly improve the capacity, rate ability and cyclical stability of the battery. Credit: Shuang Yuan, Associate Prof. Department of New Energy Science & Engineering, School of Metallurgy Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education) Northeastern University, China Tel: +86-24-8368 1171 E-mail: yuanshuang@ciac.ac.cn Add: Box314, Northeastern University, Shenyang, 110819, China
27 Jun 2018 Boston - Recent research published in a paper in NANO by a group of researchers from Northeastern University investigated the effect of hierarchical Bi2MoO6 nanosheet arrays on the performance of Li-ion batteries (LIBs) and found that it improves the cycle stability and capacity and is expected to be used in portable electronic devices in the future.

With the rapid development of modern technology, a variety of portable electronic products have become the requirement of time. Li-ion batteries (LIBs) are the optimum selection by virtue of long cycle-life and high energy density properties. Meanwhile, LIBs are viewed as one of the most promising technology in various fields including the defense industry, space technology, electric vehicles and other fields. Nowadays, commercial LIBs mainly use graphite as the anode material. However, graphite can hardly provide the high capacity and high energy density necessary to satisfy the demand required for high power application of the next-generation LIBs due to its low theoretical specific capacity.

Thus, development of high-performance anode materials with high capacity as well as low insertion voltage is urgently needed. In terms of their high capacity, lots of metal oxides have attracted great interest in recent years. However, most metal oxides have low conductivity, high desertion voltage and structural instability, which result in poor rate capability, low power density and poor cycling stability. These shortcomings limit the application of metal oxides as anode materials for LIBs.

Among the numerous metal oxides, Bi2MoO6with high theoretical capacity (791 mAh/g) and low desertion voltage (<1.0 V) has been widely studied for its excellent photoelectric properties, but, there are few reports on the nanostructure Bi<sub>2</sub>MoO<sub>6</sub>as anode material for LIBs, not to mention the Bi<sub>2</sub>MoO<sub>6</sub>integrated electrode.

Thereafter, developing an effective strategy to prepare the Bi2MoO6integrated electrode and then exploring their electrochemical performance toward lithium is of great importance. To tackle the issue of low intrinsic conductivity, inferior cycling stability for Bi2MoO6as anode material, the researchers proclaim an effective strategy to the synthesis of hierarchical Bi2MoO6nanosheet arrays (BNAs) on the three-dimensional (3D) Ni foam by one-step template-free hydrothermal method. Remarkably, BNAs-integrated electrodes exhibit excellent electrochemical properties (a super high reversible discharge capacity of 2311.7<i>&#956;</i>Ah/cm<sup>2</sup>, more than 500 times of cyclic stability), when used as the anode electrode for LIBs.

Undoubtedly, this work disclosed a new comprehension for improving the performance of LIBs with metal oxides as the anode material. It can improve the cycle stability and capacity of lithium-ion battery and is expected to be used in portable electronic devices in the future.

Source: World Scientific

Back to Table of contents

Primeur weekly 2018-07-03

Quantum computing

Scientists pump up chances for quantum computing ...

CEA uses Atos simulator at the CCRT to explore the potential of quantum computing in industry ...

Focus on Europe

European parliament votes in favour of EuroHPC JU ...

European Commission welcomes Parliament vote on plans to establish EuroHPC JU ...

Report European Investment Bank: Financing the future of supercomputing - How to increase investments in high performance computing in Europe ...

Looking back on a successful PRACEdays18 ...

Middleware

Aerodynamic science reveals the best position in a peloton of 121 cyclists and calculates unexpected drag reduction for the athletes thanks to the largest simulation ever done in sport ...

Hardware

WatermelonBlock Partners with IBM Watson using its Supercomputer to let crypto investors know what the market is thinking ...

Tech Automotive Leaders Join Forces on Next-Generation In-Vehicle Networking Technologies for Autonomous and Connected Vehicles ...

Chayora Celebrates Major Milestone as It Nears Completion of Phase 1 of Its First Facility at Its Tianjin Hyperscale Data Centre Campus in China ...

Indian Institute of Technology Bombay deploys Cray to Power Research and Education ...

Lisa Compute Cluster expanded with GPUs for machine learning ...

Mellanox announces agreement with Starboard ...

Applications

Simulation for grid transmission and distribution ...

Futuristic data storage ...

GA4GH streaming API htsget a bridge to the future for modern genomic data processing ...

Department of Energy taps Argonne to lead effort focused on energy-water systems ...

Researchers discover new enzyme paradigm for critical reaction in converting lignin to useful produce useful products ...

SenseTime debuts in Singapore by signing MOU with local giants NTU, NSCC and Singtel ...

New simulations break down potential impact of a major quake by building location and size ...

AI learns the art of debate ...

Tiny sensors may help avert earthquake damage, track sonar danger, "listen" to pipelines ...

BNAs improve performance of Li-ion batteries ...

RUDN chemists have completely changed the direction of Diels-Alder reaction ...

UMass Amherst geoscientists offer new evidence for how the Adirondack Mountains formed ...

A galactic test will clarify the existence of dark matter ...

The Cloud

HPE accelerates data insight and action across the enterprise with latest Edgeline capabilities ...

Hewlett Packard Enterprise commits $4 billion to accelerate the Intelligent Edge ...