Understanding Binder-Silicon Interactions during Slurry Processing

被引：28

作者：

Burdette-Trofimov, Mary K. ^{[1
]}

Armstrong, Beth L. ^{[2
]}

Rogers, Alexander M. ^{[1
]}

Heroux, Luke ^{[3
]}

Doucet, Mathieu ^{[3
]}

Yang, Guang ^{[1
]}

Phillip, Nathan D. ^{[1
]}

Kidder, Michelle K. ^{[4
]}

Veith, Gabriel M. ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Chem Sci Div, Oak Ridge, TN 37830 USA

[2] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37830 USA

[3] Oak Ridge Natl Lab, Neutron Scattering Div, Oak Ridge, TN 37830 USA

[4] Oak Ridge Natl Lab, Energy Sci Div, Oak Ridge, TN 37830 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2020年 / 124卷 / 24期

关键词：

SOLID-ELECTROLYTE INTERPHASES; FILLED POLYMERIC SYSTEMS; POLYACRYLIC-ACID PAA; LI-ION BATTERIES; POLY(ACRYLIC ACID); NEGATIVE ELECTRODES; CARBON-BLACK; CONFORMATIONAL BEHAVIOR; RHEOLOGICAL PROPERTIES; COMPOSITE ELECTRODES;

D O I：

10.1021/acs.jpcc.0c03660

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The conformation of poly(acrylic acid) (PAA) as a function of shear during slurry processing to construct silicon-based anodes is elucidated via rheology-coupled ultra-small-angle neutron scattering (rheo-USANS). Rheo-USANS shows that PAA with encapsulated silicon exists as discrete aggregates that do not interact with one another. As a result, a well-connected matrix of silicon and carbon black dispersed in PAA does not exist; thus, the electrode is inhomogeneous. Raman mapping and X-ray photoelectron spectroscopy were used to confirm the electrode heterogeneity and further understand the cycling properties. These results are correlated to silicon surface chemistry to provide a pathway to making better electrodes.

引用

页码：13479 / 13494

页数：16

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