Advancements in Battery Materials

First-principles calculations of structure optimization, phonon modes, and finite temperature molecular dynamics predict that silicon and germanium can have stable, two-dimensional, low-buckled, honeycomb structures. Similar to graphene, these puckered structures are ambipolar and their charge carriers can behave like…

First-principles calculations of structure optimization, phonon modes, and finite temperature molecular dynamics predict that silicon and germanium can have stable, two-dimensional, low-buckled, honeycomb structures. Similar to graphene, these puckered structures are ambipolar and their charge carriers can behave like…

• HASAN ŞAHİN

First-principles calculations of structure optimization, phonon modes, and finite temperature molecular dynamics predict that silicon and germanium can have stable, two-dimensional, low-buckled, honeycomb structures. Similar to graphene, these puckered structures are ambipolar and their charge carriers can behave like…

• SEYMUR JAHANGIROV

The separator of a lithium-ion battery prevents the direct contact between the positive and negative electrodes while serving as the electrolyte reservoir to enable the transportation of lithium ions between the two electrodes.

• MELTEM YANILMAZ

A study of the average voltage to intercalate lithium in various metal oxides is presented. By combining the ab initio pseudopotential method with basic thermodynamics the average intercalation voltage can be predicted without the need for experimental data. This procedure is used to systematically study the effect of…

• MEHMET KADRİ AYDINOL
• OSMAN YILMAZ

Full charge ahead: Hydrothermal carbonization of glucose in the presence of Si nanoparticles yields a [email protected]x/C nanocomposite that has high reversible lithium-storage capacity, excellent cycling performance, and high rate capability. This material shows promise as an anode material in lithium-ion batteries.

• REZAN DEMİR ÇAKAN

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• MEHMET KADRİ AYDINOL

In this work, the phase diagram of ${\mathrm{Li}}_{x}{\mathrm{CoO}}_{2}$ is calculated from first principles for x ranging from 0 to 1. Our calculations indicate that there is a tendency for Li ordering at $x=\frac{1}{2}$ in agreement with experiment [J. N. Reimers and J. R. Dahn, J. Electrochem. Soc. 139, 2091 (1992)…

• MEHMET KADRİ AYDINOL

Asymmetric supercapacitors with high energy density are fabricated using a self‐assembled reduced graphene oxide (RGO)/MnO2 (GrMnO2) composite as a positive electrode and a RGO/MoO3 (GrMoO3) composite as a negative electrode in safe aqueous Na2SO4 electrolyte. The operation voltage is maximized by choosing two metal o…

• FETHULLAH GÜNEŞ

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• RIZA KIZILEL

Li-S rechargeable batteries are attractive for electric transportation because of their low cost, environmentally friendliness, and superior energy density. However, the Li-S system has yet to conquer the marketplace, owing to its drawbacks, namely, soluble polysulfide formation. To tackle this issue, we present here…

• REZAN DEMİR ÇAKAN

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