Rapid fabrication of hierarchical porous SiC/C hybrid structure: toward high-performance capacitive energy storage with ultrahigh cyclability

被引:11
|
作者
Yang, Bingchao [1 ]
Sun, Rongxin [2 ]
Li, Xiangjun [1 ]
Ma, Mengdong [2 ]
Zhang, Xiaoran [1 ]
Wang, Zhixiu [3 ]
Yi, Wencai [1 ]
Zhang, Zhuo [1 ]
Yang, Ruilong [4 ]
Sun, Hairui [1 ]
Gao, Guoying [2 ]
Chu, Yanhui [5 ]
Zhao, Zhisheng [2 ]
Liu, Xiaobing [1 ]
机构
[1] Qufu Normal Univ, Sch Phys & Phys Engn, Lab High Pressure Phys & Mat Sci, Qufu 273165, Shandong, Peoples R China
[2] Yanshan Univ, Ctr High Pressure Sci CHiPS, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Hebei, Peoples R China
[3] Qufu Normal Univ, Adm Off Lab & Equipment, Qufu 273165, Shandong, Peoples R China
[4] Shanxi Normal Univ, Res Inst Mat Sci, Minist Educ, Key Lab Magnet Mol & Magnet Informat Mat, Linfen 041004, Shanxi, Peoples R China
[5] South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China
基金
中国国家自然科学基金;
关键词
MICRO-SUPERCAPACITORS; ELECTRODES; NITROGEN; SUCROSE;
D O I
10.1007/s10853-021-06318-x
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Nanostructured silicon carbide (SiC) materials are expected to have bright prospect in application as high-performance electrode materials with excellent charge-discharge cycling stability. However, the exploration of SiC-based micro-supercapacitors (MSCs) still remains a grand challenge seriously hampered by low areal capacities and complicated multistep production process. Herein, we report that rationally designed SiC/C nanocomposite with hierarchical porous structure and improved electrical conductivity has been realized by a facile and rapid carbothermic reduction using silica sol and sucrose as silicon and carbon source. The amorphous carbon between SiC nanoparticles (NPs) contributes to enlarged surface areas and excellent conductivity, not only ensuring intimate contact between the electrolyte and the electrode but also providing an effective ion highway for electrolyte ions. As a result, MSCs based on SiC/C nanocomposite (Si/C mass ratio of 1:1.5) demonstrate an optimal specific areal capacitance of 11.8 mF cm(-2) at 2 mV s(-1), outstanding flexibility (104.5% retention of initial capacitance at 180 degrees bending), and superior integration. Most notably, the capacitance remains at 97.3% of the initial value after 50000 charging/discharging cycles, superior to that of most advanced SiC-based MSCs ever reported. This work demonstrates an effective design for hierarchical porous SiC/C nanocomposite for energy storage, which gives significant inspirations on the exploration of high-performance SiC-based MSCs.
引用
收藏
页码:16068 / 16081
页数:14
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