Oxidation of copper chevrel phase Cu2Mo6S8−y

Taniguchi, Masao; Wakihara, Masataka; Basu, Swapan

doi:10.1016/0167-2738(89)90231-2

Cited by 23 publications

(24 citation statements)

References 4 publications

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“…[1,2] Manganese dioxide, which has been used in primary lithium batteries and alkaline batteries for decades, is a well accepted electrode material for clean energy storage because of its low cost, low toxicity, and chemical stability. [3,4] However, the application of manganese dioxide in secondary lithium ion batteries has been hindered by some practical problems, such as its relatively low intercalation capacity and poor cycle stability; bulk manganese dioxide film could only deliver a capacity of less than 120 mA hg À1 and the host structure was easily distorted by the lithium-ion insertion/extraction reactions, thus suffering poor stability over long-term cycles. [5,6] Nanostructuring is considered to be an effective way to enhance the intercalation capacity and improve the cyclic stability.…”

Section: Introductionmentioning

confidence: 99%

Mesoporous Hydrous Manganese Dioxide Nanowall Arrays with Large Lithium Ion Energy Storage Capacities

Liu¹,

García²,

Zhang³

et al. 2009

Adv Funct Materials

162

102

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Novel nanowall arrays of hydrous manganese dioxide MnO2 · 0.5H2O are deposited onto cathodic substrates by the potentiostatic method from a mixed aqueous solution of manganese acetate and sodium sulfate. The deposition is induced by a change of local pH resulting from electrolysis of H2O, and hierarchical mesoporous nanowall arrays are formed as a result of simultaneous precipitation of manganese hydroxide and release of hydrogen gas bubbles from the cathode. The morphology and lithium ion intercalation properties are found to change appreciably with the concentration of the precursor electrolyte, with a significant reduction in specific surface area with an increased precursor concentration. For example, mesoporous nanowall arrays deposited from 0.1 M solution possess a surface area of ∼96 m2 g−1 and exhibit a stable high intercalation capacity of 256 mA hg−1 with a film of 0.5 µm in thickness, far exceeding the theoretical limit of 150 mA hg−1 for manganese dioxide bulk film. Such mesoporous nanowall arrays offer much greater energy storage capacity (e.g., ∼230 mA hg−1 for films of ∼2.5 µm) than that of anodic deposited films of the same thickness (∼80 mA hg−1). Such high lithium ion intercalation capacity and excellent cyclic stability of the mesoporous nanowall arrays, especially for thicker films, are ascribed to the hierarchically structured macro‐ and mesoporosity of the MnO2 · 0.5H2O nanowall arrays, which offer large surface to volume ratio favoring interface Faradaic reactions, short solid‐state diffusion paths, and freedom to permit volume change during lithium ion intercalation and de‐intercalation.

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Section: Introductionmentioning

confidence: 99%

Mesoporous Hydrous Manganese Dioxide Nanowall Arrays with Large Lithium Ion Energy Storage Capacities

Liu¹,

García²,

Zhang³

et al. 2009

Adv Funct Materials

162

102

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“…Many fast synthesis methods, such as microwave technique [1], pulsed laser deposition [2,3] and ultrasonic spray pyrolysis [4,5], are applied recently in order to obtain LiMn 2 O 4 with the good electrochemical Li charge-discharge cycle performance. The rapid thermal treatment is very often applied in the thin film electrode fabrication for rechargeable microbatteries [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Inequality of quenched and high temperature structure of lithium deficient LiMn2O4

Piszora

2005

Journal of Alloys and Compounds

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“…The electrochemical performance of the cathode in a lithium ion battery is strongly affected by the properties of the particles, such as the morphology, the specific surface area, the crystallinity, and the composition of the materials [10][11][12][13]. With respect to the morphology of the particles, spherical particles with narrow size distributions demonstrate a better electrochemical performance than particles with irregular morphologies because of the high packing density of the former.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical properties of LiNi0.8Co0.2−xAlxO2 (0≤x≤0.1) cathode particles prepared by spray pyrolysis from the spray solutions with and without organic additives

Kim

2010

Met. Mater. Int.

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Fine-sized LiNi0.8Co0.2-xAlxO2 (0≤x≤0.1) cathode particles were prepared by spray pyrolysis from the spray solutions with and without organic additives. Citric acid, ethylene glycol, and Drying Control Chemical Additive (DCCA) were used as organic additives and improved the morphologies and electrochemical properties of the cathode particles. The LiNi0.8Co0.2-xAlxO2 (0≤x≤0.1) cathode particles obtained from the spray solutions with organic additives were of micro size and had slightly aggregated morphologies. The initial discharge capacities of the LiNi0.8Co0.2-xAlxO2 (0≤x≤0.1) cathode particles obtained from the spray solutions without organic additive changed from 169 mAhg -1 to 190 mAhg -1 when the x changed from 0 to 0.1. However, the initial discharge capacities of the cathode particles obtained from the spray solutions with organic additives changed from 196 mAhg −1 to 218 mAhg −1 . The initial discharge capacity of the LiNi0.8Co0.15Al0.05O2 cathode particles obtained from the spray solution with organic additives was maintained after the 20th cycle at a current density of 0.1 C.

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Oxidation of copper chevrel phase Cu2Mo6S8−y

Cited by 23 publications

References 4 publications

Mesoporous Hydrous Manganese Dioxide Nanowall Arrays with Large Lithium Ion Energy Storage Capacities

Mesoporous Hydrous Manganese Dioxide Nanowall Arrays with Large Lithium Ion Energy Storage Capacities

Inequality of quenched and high temperature structure of lithium deficient LiMn2O4

Electrochemical properties of LiNi0.8Co0.2−xAlxO2 (0≤x≤0.1) cathode particles prepared by spray pyrolysis from the spray solutions with and without organic additives

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