Construction of hollow-sphere CuNi2S4 with optimized structure and boosting conductivity for hybrid supercapacitor
文献类型：期刊论文
| 作者 | Zhu, Xi; Liu, Shuangyi
|
| 刊名 | JOURNAL OF ENERGY STORAGE
 |
| 出版日期 | 2022-07-01 |
| 卷号 | 51页码:14 |
| 关键词 | Transition metal sulfides Spinel Nickel sulfides Copper sulfides Hybrid supercapacitor |
| DOI | 10.1016/j.est.2022.104582 |
| 通讯作者 | Liu, Shuangyi(liushuangyi@cigit.ac.cn) |
| 英文摘要 | Transition bimetallic sulfides with optimal composition and structure are promising battery-type materials for hybrid supercapacitors. The structure and conductivity of bimetallic sulfides are improved compared to monometallic sulfides. Herein, bimetallic spinel sulfide CuNi(2)S(4 )is first synthesized via a two-step method of chemical deposition and subsequent solvothermal method. The molar ratio of the Ni:Cu elements, chemical deposition time, and solvothermal reaction temperature are critical factors for forming single-phase CuNi2S4. The formation of hollow-sphere morphology of CuNi2S4 can be ascribed to the Kirkendall effect. CuNi(2)S(4 )electrode performs ultrahigh capacity of 458.9 mAh g(-1) at 1 A g(-1) and remains 84.6% and 77.7% capacity after 5000 and 10,000 cycles with coulombic efficiency of > 99% at 4 A g(-1). Density Functional Theory (DFT) calculation results demonstrate that the electronic conductivity of CuNi2S4 is higher than Ni3S4. The favorable electrochemical performance of CuNi2S4-2 electrode can be ascribed to the hollow structure with a large active surface and decent conductivity. The synergistic effect between Ni and Cu elements also further enhances the capability of CuNi2S4. The hybrid supercapacitor with high mass loading of 59 mg cm(-2) using CuNi2S4-2 as cathode and active carbon as anode obtains an energy density of 87.0 Wh kg(-1) with a power density of 1048.8 W kg(-1) and cyclic retention of 82.3% after 10,000 cycles. In combination, the superior electrochemical performance of spinel CuNi2S4 makes it a promising candidate for hybrid supercapacitors. |
| 资助项目 | National Natural Science Foundation of China[21875245] |
| WOS研究方向 | Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:000801896200005 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/16266]  |
| 专题 | 中国科学院重庆绿色智能技术研究院 |
| 通讯作者 | Liu, Shuangyi |
| 作者单位 | Chinese Acad Sci, Sch Energy, Chongqing Inst Green & Intelligent Technol, Chongqing 400700, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, Xi,Liu, Shuangyi. Construction of hollow-sphere CuNi2S4 with optimized structure and boosting conductivity for hybrid supercapacitor[J]. JOURNAL OF ENERGY STORAGE,2022,51:14. |
| APA | Zhu, Xi,&Liu, Shuangyi.(2022).Construction of hollow-sphere CuNi2S4 with optimized structure and boosting conductivity for hybrid supercapacitor.JOURNAL OF ENERGY STORAGE,51,14. |
| MLA | Zhu, Xi,et al."Construction of hollow-sphere CuNi2S4 with optimized structure and boosting conductivity for hybrid supercapacitor".JOURNAL OF ENERGY STORAGE 51(2022):14. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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