Gold–Palladium nanoparticles supported by mesoporous β-MnO2 air electrode for rechargeable Li-Air battery

Thapa, Arjun; Shin, Tae Ho; Ida, Shintaro; Суманасекера, Гамини; Sunkara, Mahendra K.; Ishihara, Tatsumi

doi:10.1016/j.jpowsour.2012.08.003

Cited by 58 publications

(30 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After considering all possible related product ( Figure S4 in SI), we concluded that this peak corresponds to Li2O2 formed during discharge. Note that direct observations of Li2O2 formed during discharge by Raman are not consistent in the literature, [46][47][48] and many authors, us included, failed to observe the unequivocal evidence of Li2O2. 49 We and others have suspected that electrochemically formed Li2O2 might differ from commerically obtained crystalline Li2O2.…”

Section: Raman Spectroscopymentioning

confidence: 71%

Functionalizing Titanium Disilicide Nanonets with Cobalt Oxide and Palladium for Stable Li Oxygen Battery Operations

Yao

Cheng

Xie

et al. 2015

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Li oxygen (Li-O2) batteries promise high energy densities but suffer from challenges such as poor cycling lifetime and low round-trip efficiencies. Recently, the instability of carbon cathode support has been recognized to contribute significantly to the problems faced by Li-O2 batteries. One strategy to address the challenge is to replace carbon materials with carbon-free ones. Here, we present titanium silicide nanonets (TiSi2) as such a new material platform for this purpose. Because TiSi2 exhibits no oxygen reduction reaction (ORR) or oxygen evolution reaction (OER) activities, catalysts are required to promote discharge and recharge reactions at reduced overpotentials. Pd nanoparticles grown by atomic layer deposition (ALD) were observed to provide the bifunctionalities of ORR and OER. Their adhesion to TiSi2 nanonets, however, was found to be poor, leading to drastic performance decay due to Pd detachments and aggregation. The problem was solved by adding another layer of Co3O4, also prepared by ALD. Together, the Pd/Co3O4/TiSi2 combination affords the desired functionalities and stability. Li-O2 test cells that lasted more than 126 cycles were achieved. The reversible formation and decomposition of Li2O2 was verified by Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), ferrocenium back-titration, and gas-chromatography and mass spectrometry (GC-MS). Our results provide a new material platform for detailed studies of Li-O2 operations for better understanding of the chemistries involved, which is expected to help pave the way toward practical Li-O2 battery realizations.

show abstract

Section: Raman Spectroscopymentioning

confidence: 71%

Functionalizing Titanium Disilicide Nanonets with Cobalt Oxide and Palladium for Stable Li Oxygen Battery Operations

Yao

Cheng

Xie

et al. 2015

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…LAB cells with Au-Pd nanoparticle-supported mesoporous B-MnO 2 as an air electrode showed good cyclability of 714 mAh/g at 12 cycles. 17 Highly ordered mesoporous carbon consists of a carbon matrix arranged with regularly patterned mesopores. [18][19][20][21][22][23] This kind of carbon was synthesized by using an ordered mesoporous silica template coated on a carbon precursor.…”

Section: Introductionmentioning

confidence: 99%

Highly Ordered Mesoporous Carbon Support Materials for Air Electrode of Lithium Air Secondary Batteries

et al. 2017

View full text Add to dashboard Cite

The electrochemical properties of a lithium air secondary battery (LAB) cell incorporating CMK-3 or carbon replica (CR) as a highly ordered mesoporous carbon support material were examined under the condition of a current density of 0.1 mA/cm 2 with a voltage range of 2.0 to 4.2 V in a dry air atmosphere. The first discharge capacities of the LAB cell incorporating Pt 10 Ru 90 electrocatalyst/CMK-3 and CR were 103 and 1000 mAh/g, respectively. The cycle properties of the LAB cell incorporating Pt 10 Ru 90 electrocatalyst/CMK-3 was poor; in contrast, the one incorporating CR showed better cycle stability (828 mAh/g up to 9 cycles). These superior properties with CR are due to its larger surface area and larger total pore volume than those of CMK-3.

show abstract

“…The principle of non-aqueous LieO 2 batteries usually consisting of a lithium anode, a separator, aprotic electrolyte and carbon-based cathode [3e5] is simple and based on the reversible reaction 2Li þ O 2 # Li 2 O 2 , with discharge presented by the forward direction and charge described by the reverse direction [6]. During the discharge process, the O 2 reacts with the Li þ from the electrolyte and electrons delivered from the external circuit, yielding mainly non-conductive discharge products Li 2 O 2 [7,8]. Due to its non-conductivity and insolubility in non-aqueous electrolyte [9], Li 2 O 2 would accumulate in the pores of carbon materials and block the access of O 2 and Li þ , preventing further discharge reactions and resulting in poor cycle-ability and reversibility which are major obstacles limiting the electrochemical performance of LieO 2 energy storage systems.…”

Section: Introductionmentioning

confidence: 99%

Curly MnOx nanomembranes as cathode materials for rechargeable lithium–oxygen battery systems

Sun

et al. 2015

Journal of Power Sources

View full text Add to dashboard Cite

Gold–Palladium nanoparticles supported by mesoporous β-MnO2 air electrode for rechargeable Li-Air battery

Cited by 58 publications

References 19 publications

Functionalizing Titanium Disilicide Nanonets with Cobalt Oxide and Palladium for Stable Li Oxygen Battery Operations

Functionalizing Titanium Disilicide Nanonets with Cobalt Oxide and Palladium for Stable Li Oxygen Battery Operations

Highly Ordered Mesoporous Carbon Support Materials for Air Electrode of Lithium Air Secondary Batteries

Curly MnOx nanomembranes as cathode materials for rechargeable lithium–oxygen battery systems

Contact Info

Product

Resources

About