Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Strategies & Market Trends : 2026 TeoTwawKi ... 2032 Darkest Interregnum -- Ignore unavailable to you. Want to Upgrade?

To: Haim R. Branisteanu who wrote (129933)	2/7/2017 3:52:37 AM
From: Haim R. Branisteanu	1 Recommendation Recommended By Elroy Jetson Respond to of 218726

To get a view of the complicated chemistry employed in research today related to batteries I am posting this' Aluminium and Magnesium Insertion in Sulfur-Based Spinels: a First-Principles Study Vadym V. Kulish, Daniel Koch and Sergei Manzhos Phys. Chem. Chem. Phys., 2017, Accepted Manuscript DOI: 10.1039/C6CP08284J Received 04 Dec 2016, Accepted 03 Feb 2017 First published online 03 Feb 2017 We computationally screen several sulfur-based materials with spinel crystal structure as potential Al and Mg insertion hosts for Al and Mg-ion batteries. We evaluate the effect of transition-metal substitution (TM=Ti, Cr, Mn, Fe, Co, Ni) on the key properties determining electrode performance. We systematically calculate the thermodynamic stability, average voltage, binding energy, volume expansion, and Al/Mg diffusion for all compounds. The results suggest that the Ni-based spinel shows a relatively high Al and Mg insertion voltage and low diffusion barriers, and thus is a promising candidate cathode material for Al and Mg-ion batteries. ZIF-67 derived Ag-Co3O4@N-doped carbon/carbon nanotubes composite and its application in Mg-air fuel cell Min Jianga, Hao Hea, b, , , Wen-Jun Yia, Wen Huangc, Xiang Panb, Ming-Yu Wangb, Zi-Sheng Chaoa, b, , a College of Chemistry and Chemical Engineering, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, Chinab College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, Chinac College of Chemistry and Chemical Engineering, Central South University, Changsha 410082, China Received 6 December 2016, Revised 30 January 2017, Accepted 30 January 2017, Available online 1 February 2017 Abstract Ag-Co3O4@N-doped carbon/carbon nanotubes composites are synthesized by dispersing Ag nanoparticles throughout the N-doped carbon derived from ZIF-67/CNT. In oxygen reduction reaction (ORR), the synthesized composites possess a one-step 4 electron pathway, and a synergistic effect between Ag nanoparticles and N-doped carbon is proposed. In the Mg-air fuel cell, the synthesized composites show the highest power density of 88.9 mW/cm2 at current density of 140 mA/cm2, better than that of 20%Pt/C. This excellent performance ensures this composite a promising ORR catalyst for Mg-air fuel cell.