2013
DOI: 10.1021/am3026129
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Surface Characterization of the Carbon Cathode and the Lithium Anode of Li–O2 Batteries Using LiClO4 or LiBOB Salts

Abstract: The surface compositions of a MnO₂ catalyst containing carbon cathode and a Li anode in a Li-O₂ battery were investigated using synchrotron-based photoelectron spectroscopy (PES). Electrolytes comprising LiClO₄ or LiBOB salts in PC or EC:DEC (1:1) solvents were used for this study. Decomposition products from LiClO₄ or LiBOB were observed on the cathode surface when using PC. However, no degradation of LiClO₄ was detected when using EC/DEC. We have demonstrated that both PC and EC/DEC solvents decompose during… Show more

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Cited by 66 publications
(72 citation statements)
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“…The rechargeable Li-O 2 battery has recently attracted a great deal of attention because of its significantly higher theoretical energy density than traditional lithium-ion battery [1][2][3][4][5]. A Li-O 2 battery prototype is composed of a lithium metal anode, Li + -containing nonaqueous electrolyte, and a porous O 2 cathode (normally carbon-based materials with or without catalysts).…”
Section: Introductionmentioning
confidence: 99%
“…The rechargeable Li-O 2 battery has recently attracted a great deal of attention because of its significantly higher theoretical energy density than traditional lithium-ion battery [1][2][3][4][5]. A Li-O 2 battery prototype is composed of a lithium metal anode, Li + -containing nonaqueous electrolyte, and a porous O 2 cathode (normally carbon-based materials with or without catalysts).…”
Section: Introductionmentioning
confidence: 99%
“…For example, Younesi et al reported the formation of carbonate and ether containing species on carbon electrode when cycling Li-O 2 batteries containing carbonate-based electrodes. 20 The chemical composition of the interface may further be semi-quantitatively evaluated, thus permitting a comparison between electrodes recovered after different cycling conditions.The aim is to study the complex surface electrochemistry of one of the most typical positive electrode material (nanoparticulate carbon Super C65) and electrolyte (0.2 M LiTFSI in Diglyme) combinations for Li-O 2 batteries by performing in situ gaseous, ex situ structural, morphological and compositional analysis during the first discharge/charge cycle. …”
mentioning
confidence: 99%
“…For example, Younesi et al reported the formation of carbonate and ether containing species on carbon electrode when cycling Li-O 2 batteries containing carbonate-based electrodes. 20 The chemical composition of the interface may further be semi-quantitatively evaluated, thus permitting a comparison between electrodes recovered after different cycling conditions.…”
mentioning
confidence: 99%
“…However, carbonate solvents have been shown to have unstable cathode and anode performance. [8][9][10][11][12] Research into ether based solvents was initially more promising with the formation of Li 2 O 2 clearly demonstrated.13,14 However, sustained stable cycling has not been conclusively established. [15][16][17] This combined with the instability of ethers to Li 2 O 2 as well as auto-oxidation reactions suggests that this solvent system is also unrealistic.…”
mentioning
confidence: 99%