| Publication Type |
Journal Article |
| Title |
Morphological changes and electrochemical response of mixed nickel manganese oxides as charge storage electrodes |
| Authors |
Tuyen Nguyen Michel Boudard Laetitia Rapenne Maria J. Carmezim Maria F. Montemor |
| Groups |
CSSE |
| Journal |
JOURNAL OF MATERIALS CHEMISTRY A |
| Year |
2015 |
| Month |
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|
| Volume |
3 |
| Number |
20 |
| Pages |
10875-10882 |
| Abstract |
Nickel manganese (Ni-Mn) oxide films were prepared by potentiostatic electrodeposition over stainless steel and post-thermal annealing at 250 degrees C. Morphological and structural changes were observed depending on the Ni to Mn ratio in the electrolyte. Single-phase Ni1-xMnxO oxide was formed at low Mn content, whereas two phases composed of Ni1-xMnxO and NixMn(3-x)O(4) were formed at high Mn content. Electrochemical studies revealed an increase of the specific capacitance of the mixed Ni-Mn oxide electrodes compared to the single metal oxides, thus pin-pointing a synergistic effect. The Ni-Mn oxide film displayed a specific capacitance of about 300 F g(-1) in a potential window of 0.5 V at an applied current density of 1 A g(-1). The rate capability of the oxides was 58\% when the applied current was increased from 1 A g(-1) to 10 A g(-1). The Ni-Mn oxide film exhibits excellent cycling stability with 100\% capacitance retention after 1500 cycles. |
| DOI |
http://dx.doi.org/10.1039/c5ta01453k |
| ISBN |
|
| Publisher |
ROYAL SOC CHEMISTRY |
| Book Title |
|
| ISSN |
2050-7488 |
| EISSN |
2050-7496 |
| Conference Name |
|
| Bibtex ID |
ISI:000354395400033 |
| Observations |
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