联系我们  |  网站地图  |  English   |  移动版  |  中国科学院 |ARP
站内搜索:
首页 简介 管理部门 科研部门 支撑部门 研究队伍 科研成果 成果转化 研究生教育 党建与创新文化 科普 信息公开 办公内网
科技信息
Low-cost wearables manuf...
Researchers develop 3-D-...
硫化钴能用来制作超级电容
青岛能源所在石墨炔能源存...
二维非铅钙钛矿动力学机理...
Scientists fine-tune sys...
Amorphous diamond synthe...
化学耦合的硫化镍和碳空心...
全无机钙钛矿光电探测器动...
科研人员提出纳米催化医学...
Newly-discovered semicon...
Molecular nanoparticles ...
碳纳米点固态高效发光新方法
基于甲胺气体的钙钛矿薄膜...
新型镁电池可使储能技术更...
现在位置:首页>新闻动态>科技信息
Researchers develop simple way to fabricate micro-supercapacitors with high energy density
2017-07-04 09:13:16 | 编辑: | 【 【打印】【关闭】

 

(Left) Photograph of nine interconnected microsupercapacitors. (Right) Microsupercapacitors in a highly folded state. Credit: Xiao et al. ©2017 American Chemical Society

  (Phys.org)—One of the most promising microscale power sources for portable and wearable electronics is a micro-supercapacitor—they can be made thin, lightweight, highly flexible, and with a high power density. Normally, however, manufacturing these devices involves complicated techniques that often require high pressures, irradiation, and multiple steps.

  In a new study, researchers have developed a simple "one-step method" for fabricating micro-supercapacitors and demonstrate that the final devices exhibit a very good overall performance, including a high power density (1500 mW/cm3) as well as an energy density (11.6 mWh/cm3) that is at least twice as high as similar micro-supercapacitors.

  The researchers, Han Xiao et al. at the Chinese Academy of Sciences, have published their paper in a recent issue of ACS Nano.

  "We have developed a versatile, simple and effective method for fabricating high-energy micro-supercapacitors with designed shapes," coauthor Zhong-Shuai Wu at the Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, told Phys.org.

  The essential step of fabricating the new micro-supercapacitor is integrating phosphorene nanosheets into the interlayer of graphene nanosheets, and the good performance is in large part due to the synergistic combination of these two materials. The different materials have complementary effects, with the phosphorene offering a high storage capacity and preventing the graphene sheets from unwanted stacking, while the graphene forms the main skeleton and offers a high-speed electron transport network.

  Among their other characteristics, the micro-supercapacitors demonstrate very good flexibility, which the researchers attribute to the layered structure and planar device geometry. The device also has a high capacitance, which is maintained at nearly 90% of its maximum capacity after 2000 cycles. In general, the simple fabrication process also contributes to improving the device performance because it avoids the contamination and oxidation that often occur during multiple-step processing.

  As the researchers explain, the small energy-storage devices have the potential to be used in a wide variety of areas.

  "Micro-supercapacitors are very promising for on-chip energy storage," Wu said. "Very recently, the emergence of wearable and smart electronics urgently call for highly flexible and multi-functional, integrated energy storage devices. Overall, new micro-supercapacitors could keep up with the pace of the fast development of high-tech microsystems used in the precision instruments, materials, bio-medical and other fields."

  The researchers also expect that, in the future, the new fabrication process can be easily scaled up and eventually be used for commercial purposes. They also plan to investigate other materials and techniques for developing microscale energy storage systems.

  "We are continuously developing a variety of ultrathin, structurally defined graphene and 2-D materials, safe high-voltage electrolytes, and device fabrication techniques for flexible, smart, and integrated microscale energy storage device systems, such as high-energy micro-supercapacitors," Wu said.

  Explore further: Stretchy supercapacitors power wearable electronics 

  More information: Han Xiao et al. "One-Step Device Fabrication of Phosphorene and Graphene Interdigital Micro-Supercapacitors with High Energy Density." ACS Nano. DOI: 10.1021/acsnano.7b03288   

  Journal reference: ACS Nano 

版权所有 中国科学院上海硅酸盐研究所 沪ICP备05005480号
长宁园区地址:上海市长宁区定西路1295号 电话:86-21-52412990 传真:86-21-52413903 邮编:200050
嘉定园区地址:上海市嘉定区和硕路585号  电话:86-21-69906002 传真:86-21-69906700 邮编:201899