Systematic study on the discharge product of Pt-based lithium oxygen batteries

Abstract

Lithium oxygen batteries have attracted much attention due to the high theoretical energy density. However, they suffer a large overpotential during oxygen evolution process and thus catalysts play a vital role in the reaction. Here, we systematically explored the influence of Pt-based nanoparticle catalysts on the discharge product Li 2 O 2. Because of the superior electrical conductivity and the strong binding with oxygen, Pt-based nanoparticles serve as active sites which are favorable for the growth of toroidal Li 2 O 2. We also found that the content and composition of Pt-based nanoparticle catalysts exert a significant influence on the electrochemical performance of lithiumoxygen batteries. The discharge products are composed of crystalline Li 2 O 2

Binder-free Li-O 2battery cathodes using Ni- and PtRu-coated vertically aligned carbon nanofibers as electrocatalysts for enhanced stability

“…6(e) that the VACNF-PtRu maintained a high discharge capacity (> 0.4 mAh•cm −2 ) in its 28 th cycle as compared to other cathodes (< 0.15 mAh•cm −2 ). This superior performance of PtRu catalyst was also reported in previous studies [30].…”

“…Ko et al reported the performance of various combinations of noble metal alloys, including Pt-Ru, Pd-Ir, and Pt-Pd supported on Vulcan XC and showed that Pt-Ru/C exhibited highest discharge capacity (346 mAh•g −1 ) followed by Pt-Pd (153 mAh•g −1 ) and Pd-Ir (135 mAh•g −1 ) at a current density of 0.2 mA•cm −2 [30]. Wu et al compared the LOB performance by employing pure Pt and Pt-Ru catalysts supported on Vulcan XC.…”

Anisotropic Surface Modulation of Pt Catalysts for Highly Reversible Li–O2 Batteries: High Index Facet as a Critical Descriptor

“…In addition, Song et al reported that the solid discharge product grows on the Co 3+ -exposed {112} facet of a Co 3 O 4 plate in a unique angular, conical morphology; growth on this facet is preferential over that on the carbon or Co 2+ -exposed {001} facet of Co 3 O 4 cubes . However, compared to prior studies of a Pt-based catalyst in a Li–O 2 battery, a morphologically tailored catalyst with proper surface atomic arrangement on the Pt-based catalysts is unprecedented. − In this regard, the purpose of this work is to address the advantage of using an optimized atomic arrangement resulting from morphological characteristics to create a new breakthrough. Herein, we introduce the facile synthesis of anisotropic Pt catalysts, where the catalytic surfaces were exposed with high-index {411} facets along with several low-index facets to maximize the catalytic properties for the ORR/OER in the cathode of Li–O 2 batteries.…”

Recent progress on single-atom catalysts for lithium–air battery applications

“…As a noble metal element, platinum (Pt) is a frequently used catalytic material with good conductivity, thermal conductivity, and extremely stable chemical properties. 138,139 To date, there have been many investigations on this. 118,140–142 For instance, Lee et al 118 successfully prepared Pt SACs supported on titanium nitride nanoparticles with the aid of chlorine ligands, which showed excellent performance in oxygen reduction, formic acid oxidation as well as methanol oxidation.…”