Brownian-snowball-mechanism-induced hierarchical cobalt sulfide for supercapacitors
文献类型：期刊论文
| 作者 | Zhao, Yucheng; Shi, Zhe; Lin, Tianquan; Suo, Liumin; Wang, Chao; Luo, Jing; Ruan, Zhangshun; Wang, Chang-An; Li, Ju |
| 刊名 | JOURNAL OF POWER SOURCES
 |
| 出版日期 | 2019-02-01 |
| 卷号 | 412页码:321 |
| 关键词 | Supercapacitor Cobalt sulfide Hierarchical porous nanospheres Brownian snowball mechanism Precise control Differentiate Faradaic capacitance |
| ISSN号 | 0378-7753 |
| DOI | 10.1016/j.jpowsour.2018.11.055 |
| 文献子类 | Article |
| 英文摘要 | Transition metal sulfides with hierarchical (ball in ball) micro/nanoporous structures have drawn wide spread interests for various applications, such as energy storage, catalysis, solar cells, owing to their unique features and intriguing properties. However, precise control of synthesizing process for hierarchical porous nanospheres of transition metal sulfides remains a big challenge. In addition, the charging and discharging process of transition metal sulfides in electrochemical storage is still a black box. Herein we design and precise control of synthesizing a transition metal sulfide with hierarchical porous nanosphere structure, namely cobalt sulfide hierarchical porous nanospheres (HPNs). Brownian snowball mechanism is put forward to explain the formation mechanism of CoS samples, which is supported by first-principles calculations. The proposed Brownian snowball mechanism helps us understand the formation process and facilitates comprehensive and precise manipulation, a key requirement for industrial scale-up. The CoS hierarchical porous nanospheres with a specific surface area of approximately 140 m(2)/g possess a total specific capacitance of 1310 F/g and 932 F/g at a current density of 5 A/g when used as electrode materials for electrochemical capacitors. The capacitance reflected hybrid electrical energy storage and is separated into double layer charging and the Faradaic contribution from the OH- ions reactions with surface atoms. It is demonstrated that Faradaic capacitance dominates in CoS hierarchical porous nanospheres exceeding 770 F/g by an analysis of the voltammetric sweep data. |
| WOS研究方向 | Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.sic.ac.cn/handle/331005/27371]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 GB/T 7714 | Zhao, Yucheng,Shi, Zhe,Lin, Tianquan,et al. Brownian-snowball-mechanism-induced hierarchical cobalt sulfide for supercapacitors[J]. JOURNAL OF POWER SOURCES,2019,412:321. |
| APA | Zhao, Yucheng.,Shi, Zhe.,Lin, Tianquan.,Suo, Liumin.,Wang, Chao.,...&Li, Ju.(2019).Brownian-snowball-mechanism-induced hierarchical cobalt sulfide for supercapacitors.JOURNAL OF POWER SOURCES,412,321. |
| MLA | Zhao, Yucheng,et al."Brownian-snowball-mechanism-induced hierarchical cobalt sulfide for supercapacitors".JOURNAL OF POWER SOURCES 412(2019):321. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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