2018新材料国际发展趋势高层论坛

黄建宇

返回列表 >

职位/职称:

单位: 燕山大学

报告论坛: 材料界面与控制分论坛

报告题目: In Situ TEM Imaging Interface and Surface Evolution during Battery Operations

简历:

黄建宇,燕山大学教授,博士生导师。1996年博士毕业于中科院金属研究所;1996年至1999年间,于日本国家无机材料研究所、日本大阪大学先后任职;1999年至2001年间,于美国洛斯阿拉莫斯国家实验室做博士后;2002年至2012年间,于美国波斯顿学院、美国桑迪亚国家实验室纳米科技综合中心主任研究员。一直以来以电子显微镜为主要研究手段,从事纳米材料与能源科学研究工作20多年,主持或者共同主持美国能源部和自然科学基金等项目12项。在电池研究领域取得了系列原创性的研究成果,建立了多种纳米力学和能源材料透射电镜-探针显微镜(TEM-SPM)的原位定量测量技术,在国际上率先制 造出可在高真空度电镜中工作的锂电池,发明了在原子尺度上实时观察锂离子电池充放电过程的新技术,形成了原位纳米尺度电化学和纳米力学研究的新领域,为锂离子电池研究提供了有效的技术手段,得到了学术界的广泛认同和高度评价。研究成果在Nature, Science, Phy. Rev. Lett., Nature Nanotech., Nature Comm., Nature Methods, PNAS, Angew Chem. 等杂志上发表, 共发表论文218篇,h因子为76,总引用次数超过20000次,在各种专业学术会议上发表特邀报告90 多 次。 

摘要:

The advent of aberration corrected environmental transmission electron microscope (ETEM) provides new opportunities in studying gas solid interactions. Recent results obtained from the ETEM at Yanshan University are presented, which include in situ imaging the nano welding of ceramic nanowires, all solid state sodium oxygen batteries (SOBs) and potassium carbon dioxide (K-CO2) nanobatteries.
Under a CO2 environment, we realized a ceramic nanowelding through a chemical reaction MgO + CO2 → MgCO3 by using the porous MgO as the solder. Using this new nanotechnology, we conducted not only nanowelding on MgO, CuO, and V2O5 nanowires and performed tensile tests successfully on these nanowires but also macroscopic welding on ceramic material such as SiO2, indicating the great application potential of this technology in the bottom-up ceramic tools and devices.
In SOB, the ORR occurred in a distinct two-step reaction: namely a first conversion reaction followed by a second multiple ORRs. In the former, CuO was first converted to Cu2O and then to Cu; in the latter, NaO2 formed first, followed by its disproportionation to Na2O2 and O2. Concurrent with the two distinct electrochemical reactions, the CuO NWs experienced multiple consecutive large volume expansions. It is evident that the freshly formed ultrafine-grained Cu in the conversion reaction catalyzed the latter one-electron-transfer ORR, leading to the formation of NaO2. These results provide fundamental understanding into the oxygen chemistry in the carbonless air cathode in all solid state SOBs. In K-CO2 nano batteries, during discharge, K2CO3 was generated in the cathode, which converted back to metal K during charge, and the K-CO2 nanobattery demonstrates a good cyclability. Moreover, it is evident that CO gas was released during discharge and the carbon cathode was consumed continuously during charge. Our study provides a fundamental understanding of the K-CO2 battery, which may aid the designing of K-CO2 based energy storage devices.

请现场注册

重要日期

会议开始时间

2018-09-16

会议结束时间

2018-09-18

报到时间

2018-09-16

poster提交截止日期

2018-08-30

报告人摘要提交截止日期

2018-08-25

联系方式

王方 
电话:029-86226599
传真:029-86282362
materialschina@163.com


王媛
电话: 13464049904
yuan209108@imr.ac.cn 

富甘霖(参展及赞助)
电话:13811320379 
13811320379@163.com

高虹(财务)
电话:029-86226599
传真:029-86282362
zgcljz@126.com

 

Powered by YConf.org · Manage Conference