您的位置>> 首页 > 科学研究 > 研究动态 > 正文
研究动态Infomation
物理大讲堂——青年学者论坛(28)
发表于: 2017-12-15 16:07  点击:

报告题目:Materials for High-rate Storage of Electrical Energy: State of-the-Art and Research Directions

报告人:Prof. Yury Gogotsi

报告时间:2017年12月18日星期一下午2:00

报告地点:吉林大学中心校区物理楼333讲学厅


报告人简介:

尤里•高果奇教授作为世界碳材料和储能领域的著名领军人物,于2016年入选“千人计划”外专项目专家引入吉林大学物理学院。尤里•高果奇教授为ACS Nano副主编;在Science、Nature及其子刊发表论文24篇,SCIE检索论文500余篇,2本专著的合作者,14本专著编辑,研究成果他引累计40000余次,具有极高的学术水平和学术声誉,其H因子高达92,自2014年至2017年连续4年入选全球 “高被引科学家(Highly Cited Researchers)”名单,被Tomson Reuters评为“世界最有影响力的科学家”。


 

报告简介:

Further scientific advances are needed to move into an era of electrochemical energy storage with significantly higher capacity, faster charging, lower cost, greater reliability, and increased safety. These advances and innovations for energy storage will find immediate impact in applications across many fields — transportation, the electricity grid, communication, Internet of Things (IoT), and energy security.

The scientific directions presented in this lecture build on rich opportunities in the synthesis of nanoscale materials and design of 3D architectures with the required functionality for high-rate storage of electrical energy.

Special attention in development of high-rate energy storage devices, both batteries and supercapacitors, will be dedicated to two-dimensional (2D) materials, which are receiving increasing attention due to their unusual electronic, mechanical and optical properties. 2D materials hold much promise for energy storage applications due to their large number of electrochemically active sites per unit of surface area [1]. Several of them are already available in large quantities at a moderate cost and can serve as convenient building blocks for a variety of layered structures, membranes and composites. There are several single-element 2D materials, such as graphene or phosphorene, but the majority contain two (dichalcogenides, simple oxides) or more elements. Transition metal carbides, carbonitrides and nitrides (MXenes) are among the latest additions to the 2D world. [2] Ti3C2 was the first MXene reported in 2011 and since then, about 30 different MXene compositions have been synthesized and dozens more predicted to exist and studied in silico. A combination of high electronic conductivity, oxide/hydroxide-like surface with redox-active transition metals exposed make MXenes very attractive for fabrication of electrodes. Their energy storage applications already range from Li-ion and Na-ion batteries and capacitors, to supercapacitors and Li-S batteries.

The use of fast surface redox storage (pseudocapacitive) mechanisms can enable devices that store much more energy than electrical double layer capacitors (EDLCs) and, unlike conventional batteries, can do so quite rapidly. We have demonstrated that two-dimensional transition metal carbides (MXenes), can operate at the rates exceeding those of conventional EDLCs, but still provide higher volumetric and areal capacitance than carbons, electrically conducting polymers or transition metal oxides. We designed electrode architectures that pushed the performance of Ti3C2 and Mo2C to the new heights. A macroporous Ti3C2 MXene film delivered up to 210 Fg-1 at scan rates of 10 Vs-1, surpassing the best carbon supercapacitors known. Moreover, we showed that MXene hydrogels are able to deliver volumetric capacitance of ~1500 Fcm-3. [3]  

Finally, designs of microscale energy storage devices for IoT will be described.

References

1. B. Mendoza-Sánchez, Y. Gogotsi, Synthesis of Two-Dimensional Materials for Capacitive Energy Storage, Advanced Materials, 28, 6104-6135 (2016)

2. B. Anasori, M. R. Lukatskaya, Y. Gogotsi, 2D metal carbides and nitrides (MXenes) for energy storage, Nature Reviews Materials, 2, 16098 (2017)

3. M. R. Lukatskaya, et al., Ultra-high-rate pseudocapacitive energy storage in two-dimensional transition metal carbides, Nature Energy, 2, 17105 (2017)

M.R. Lukatskaya, B. Dunn, Y. Gogotsi, Multidimensional Material and Device Architectures for Hybrid Energy Storage, Nature Communications, 7, 12647 (2016)

主办单位:

新型电池物理与技术教育部重点实验室

吉林大学物理学院






版权所有:吉林大学物理学院 © 2017 电话:0431-85166112 邮箱:wlxy@jlu.edu.cn

地址:吉林省长春市前进大街2699号 邮编:130012