Research of MnCO3/CB Composite on Properties Apply to Supercapacitors
| Autor: | Han Liqiong, Liu Yifan, Li Rongyu |
|---|---|
| Jazyk: | English<br />French |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | E3S Web of Conferences, Vol 185, p 04023 (2020) |
| Druh dokumentu: | article |
| ISSN: | 2267-1242 20201850 |
| DOI: | 10.1051/e3sconf/202018504023 |
| Popis: | In order to improve the electro-conductibility of new energy storage material-manganese carbonate(MnCO3) and the properties apply to supercapacitors, we produce MnCO3/CB composite at room temperature by using a simple and mild liquid phase deposition method. Using dilute HNO3 to purify and activate the CB(carbon black), then put the handled CB into NH4HCO3/MnSO4 mixed solution for liquid deposition. Observed through infrared and XPS methods, we found that - after purified by dilute HNO3, the negatively charged groups(carboxyl & quinonyl) on CB surface increase, which makes CB uneasy to reunite in water and benefits the producing of a homogeneous compound. Observed the compound under SEM:40nm diameter CB granules wrap the Lotus-shaped MnCO3 granule, and form a porous structure between MnCO3 granules. The result of electro-chemical properties indicated by galvanostatic charge-discharge tests shows that the specific capacity of MnCO3/CB composite electrode material is twice of the pure MnCO3 electrode material, while the MnCO3/CB composite has a good cycle capacitive retention ratio. As a newly discovered energy storage material, MnCO3 provides a new direction to make composite material for supercapacitor electrodes. |
| Databáze: | Directory of Open Access Journals |
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