[Liu, Chang; Li, Feng; Ma, Lai-Peng; Cheng, Hui-Ming] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China.;Cheng, HM (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China;cheng@imr.ac.cn

Advanced Materials for Energy Storage

Note: Times Cited: 875 Reference EPFL-ARTICLE-206025doi:10.1021/cr0501846View record in Web of Science URL: ://WOS:000249839900009 Record created on 2015-03-03, modified on 2017-05-12

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Complex hydrides for hydrogen storage.

Complex Hydrides for Hydrogen Storage

Hydrogen is a promising energy carrier in future energy systems. However, storage of hydrogen is a substantial challenge, especially for applications in vehicles with fuel cells that use proton-exchange membranes (PEMs). Different methods for hydrogen storage are discussed, including high-pressure and cryogenic-liquid storage, adsorptive storage on high-surface-area adsorbents, chemical storage in metal hydrides and complex hydrides, and storage in boranes. For the latter chemical solutions, reversible options and hydrolytic release of hydrogen with off-board regeneration are both possible. Reforming of liquid hydrogen-containing compounds is also a possible means of hydrogen generation. The advantages and disadvantages of the different systems are compared.

Chemical and Physical Solutions for Hydrogen Storage

The extent to which member states transpose EU directives in a timely fashion is often argued to be strongly associated with the general effectiveness of national bureaucracies. But what kind of institutional solutions ensure better performance? This paper examines the patterns and effects of departmental oversight across 28 ministries in Estonia, Hungary, Poland and Slovenia. In mapping the strength of oversight, it relies on around 90 structured interviews regarding the rules-in-use on transposition planning, legal review and monitoring of deadlines. The analysis of the impact of departmental oversight is based on an original dataset of over 300 directives with transposition deadlines between January 2005 and December 2008.

On the european union

This monitor aims to present the first comprehensive assessment of e-waste volumes, their corresponding impacts and management status on a global scale. This is measured using an internationally-adopted measuring framework that has been developed by the Partnership on Measuring ICT for Development (Balde et al., 2015). The methodology calculates the amount of e-waste generated from harmonised modelling steps and data sources. The outcomes Show an unprecedented level of accuracy and harmonisation across countries and are very useful for international benchmarking. It is estimated that the total amount e-waste generated in 2014 was 41.8 million metric tonnes (Mt). It is forecasted to increase to 50 Mt of e-waste in 2018.

The Global E-waste Monitor 2014: Quantities, flows and resources

This monitor provides the most comprehensive update of global e-waste statistics In 2019, the world generated a striking 536 Mt of e-waste, an average of 73 kg per capita The global generation of e-waste grew by 92 Mt since 2014 and is projected to grow to 747 Mt by 2030 – almost doubling in only 16 years

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The Global E-waste Monitor 2020: Quantities, flows and the circular economy potential

This report provides the most comprehensive overview of global e-waste statistics following the guidelines that were developed by the Partnership on Measuring ICT for Development1. All the countries in the world combined generated a staggering 44.7 million metric tonnes (Mt), or an equivalent of 6.1 kilogram per inhabitant (kg/inh), of e-waste annually in 2016, compared to the 5.8 kg/inh generated in 2014. This is close to 4,500 Eiffel Towers each year. The amount of e-waste is expected to increase to 52.2 million metric tonnes, or 6.8 kg/inh, by 2021.

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The Global E-waste Monitor 2017: Quantities, Flows and Resources

Important limitations in the application of light metal hydrides for hydrogen storage are slow kinetics and poor reversibility. To alleviate these problems doping and ball-milling are commonly applied, for NaAlH 4 leading to particle sizes down to 150 nm. By wet-chemical synthesis we have prepared carbon nanofiber-supported NaAlH 4 with discrete particle size ranges of 1-10 microm, 19-30 nm, and 2-10 nm. The hydrogen desorption temperatures and activation energies decreased from 186 degrees C and 116 kJ.mol (-1) for the largest particles to 70 degrees C and 58 kJ.mol (-1) for the smallest particles. In addition, decreasing particle sizes lowered the pressures needed for reloading. This reported size-performance correlation for NaAlH 4 may guide hydrogen storage research for a wide range of nanostructured light (metal) hydrides.

/pdf/sodium-alanate-nanoparticles-linking-size-to-hydrogen-320kzqsmsv.pdf

Cornelis P. Balde

Papers

The Global E-waste Monitor 2014: Quantities, flows and resources

The Global E-waste Monitor 2020: Quantities, flows and the circular economy potential

The Global E-waste Monitor 2017: Quantities, Flows and Resources

Sodium alanate nanoparticles--linking size to hydrogen storage properties.

Enhancing e-waste estimates: Improving data quality by multivariate Input–Output Analysis