| Title of Article |
Ball Milling Modification of Perovskite LaNiO3 Powders for
Enhancing Electrochemical Pseudocapacitor |
| Date of Acceptance |
12 June 2021 |
| Journal |
| Title of Journal |
Surfaces and Interfaces |
| Standard |
SCOPUS |
| Institute of Journal |
Elsevier |
| ISBN/ISSN |
|
| Volume |
|
| Issue |
|
| Month |
|
| Year of Publication |
2021 |
| Page |
|
| Abstract |
A perovskite LaNiO3 powder was prepared via a sol– gel method. The powder has a
particle size of 0.28 m and a rhombohedral crystal structure. Electrochemical performance of
the as-prepared LaNiO3 electrodes is as low as 9.94 F g-1 at the discharged current density of 5
A g-1. Ball milling treatments of the LaNiO3 powders in dry-air, ethanol and DI water reduce
the particle sizes and greatly improve their specific capacitances to 27.10, 64.23 and 76.87 F g-
1, respectively. X-ray diffraction detects a second phase formation of La(OH)3 in LaNiO3 ballmilled
in DI water. Energy dispersive X-ray spectra and X-ray photoelectron spectroscopy
results suggest that the charge process of the LaNiO3 electrode attracts OH ions to the LaNiO3
electrode and oxidizes Ni2+ to Ni3+. In contrast, the discharge process releases OH ions from
the LaNiO3 electrode and reduces Ni3+ back to Ni2+. Electrochemical impedance spectroscopy
shows that the DI-ball-milled LaNiO3 powders have lower series resistance (Rs = 0.207 ) and
charge-transfer resistance (Rct = 0.18 ,) than the as-prepared LaNiO3 powders (Rs = 0.205
and Rct = 0.99 ). |
| Keyword |
supercapacitors; pseudocapacitor; perovskite LaNiO3; La(OH)3; ball milling |
| Author |
|
| Reviewing Status |
มีผู้ประเมินอิสระ |
| Status |
ได้รับการตอบรับให้ตีพิมพ์ |
| Level of Publication |
นานาชาติ |
| citation |
false |
| Part of thesis |
true |
| Attach file |
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| Citation |
0
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Publication
Journal Publication
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