期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 122, 期 18, 页码 9746-9754出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.8b01062
关键词
-
资金
- U.S. Department of Energy (DOE) [DE-AC05-00OR22725]
- US government
- DOE
- Vehicle Technologies Office, Hybrid Electric Systems Program, Battery R&D, at the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy
Si has the possibility to greatly increase the energy density of Li-ion battery anodes, though it is not without its problems. One issue often overlooked is the decomposition of Si during large scale slurry formulation and battery fabrication. Here, we investigate the mechanism of H-2 production to understand the role of different slurry components and their impact on the Si oxidation and surface chemistry. Mass spectrometry and in situ pressure monitoring identifies that carbon black plays a major role in promoting the oxidation of Si and generation of H-2. Si oxidation also occurs through atmospheric O-2 consumption. Both pathways, along with solvent choice, impact the surface silanol chemistry, as analyzed by H-1-Si-29 cross-polarization magic angle spinning nuclear magnetic resonance (MAS NMR) and attenuated total reflectance Fourier transform infrared spectroscopy (ATR FTIR). An understanding of the oxidation of Si, during slurry processing, provides a pathway toward improving the manufacturing of Si based anodes by maximizing its capacity and minimizing safety hazards.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据